Home ReviewsRefund
Home/Cadillac/STS/Cadillac STS I (2004-2007)/Repair manual/Mechanical/Engine Mechanical - 4.6l (lh2) (2 of 6)
Contents Wiring diagrams Section: Mechanical All sections

Engine Mechanical - 4.6l (lh2) (2 of 6) Cadillac STS I

Mechanical ~15453 words

Removal Procedure

  1. Remove the air conditioning, power steering, and water pump belt (3). Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Rotate the generator drive belt tensioner (4) clockwise to release drive belt tension.
  3. Slide the generator drive belt from the generator pulley (1).
  4. Allow the drive belt tensioner to return to the relaxed position.
  5. Remove the generator drive belt from the pulleys.

Installation Procedure

  1. Route the generator drive belt to the crankshaft pulley (3) and the tensioner (4).
  2. Rotate the generator drive belt tensioner (4) clockwise.
  3. Route the generator drive belt over the generator pulley (1).
  4. Release the drive belt tensioner and inspect the generator drive belt for proper seating in the accessory drive pulleys.
  5. Install the air conditioning, power steering, and water pump belt (3). Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  3. If equipped with a crankshaft driven cooling fan, remove the cooling fan bracket. Refer to «Engine Cooling Fan Bracket Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  4. Rotate the drive belt tensioner (2) clockwise to release drive belt tension.
  5. Slide the drive belt from the water pump pulley (1).
  6. Slide the drive belt out from behind the drive belt tensioner. Access the belt from the side of the tensioner pulley in the location of the lower reservoir mounting nut.
  7. Allow the drive belt tensioner to return to the relaxed position.
  8. Remove the drive belt from the remaining pulleys.
  1. Route the drive belt to the accessory drive pulleys, excluding the tensioner (2) and the water pump pulley (1).
  2. Rotate the drive belt tensioner (2) clockwise.
  3. Slide the drive belt behind the drive belt tensioner and around the tensioner pulley. Access the belt from the side of the tensioner pulley in the location of the lower reservoir mounting nut.
  4. Route the drive belt under the water pump pulley (1).
  5. Release the drive belt tensioner and inspect the drive belt for proper seating in the accessory drive pulleys.
  6. If equipped with a crankshaft driven cooling fan, install the cooling fan bracket. Refer to «Engine Cooling Fan Bracket Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  7. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  8. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the air conditioning, power steering, and water pump drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Loosen the generator drive belt tensioner bolt.
  4. Remove the drive belt tensioner and bolt from the engine.
  1. Position the generator drive belt tensioner and bolt to the engine as an assembly.
  2. Ensure that the alignment pin on the rear of the tensioner assembly is aligned with the locating hole on the engine.
  3. Install the drive belt tensioner bolt. Tighten: Tighten the drive belt tensioner bolt to 50 N.m (37 lb ft).
  4. Install the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  5. Install the air conditioning, power steering, and water pump drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the air conditioning, power steering and water pump drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Loosen the drive belt tensioner bolt.
  3. Remove the drive belt tensioner and bolt from the engine.
  1. Position the drive belt tensioner and bolt to the engine as an assembly.
  2. Ensure that the alignment pin on the rear of the tensioner assembly is aligned with the locating hole on the engine.
  3. Install the drive belt tensioner bolt. Tighten: Tighten the drive belt tensioner bolt to 50 N.m (37 lb ft).
  4. Install the air conditioning, power steering and water pump drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the air conditioning, power steering and water pump drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the drive belt idler pulley bolt.
  3. Remove the drive belt idler pulley.
  1. Install the drive belt idler pulley.
  2. Install the drive belt idler pulley bolt. Tighten: Tighten the drive belt idler pulley bolt to 50 N.m (37 lb ft).
  3. Install the drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Tools Required

  1. J 28467-15 Engine Support Adapter. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. J 28467-86 Engine Lift Bracket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. J 28467-87 Engine Lift Bracket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. J 28467-B Universal Engine Support Fixture
  1. Instructions for the right rear J 28467-87 are included at the end of this procedure. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the wiring harness push pin from the left front cylinder head bolt hole.
  4. Install the J 28467-86 to the left cylinder head. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Remove the front bolt securing the wiring harness bracket to the right cylinder head.
  6. Install the J 28467-15 to the right cylinder head. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) . The graphic shows the engine removed for clarity.
  7. Assemble a J 28467-501A (1) to each end of the J 28467-518 (2).
  8. Position the main support beam and rail support assembly (1) on the fender flange.
  9. Ensure that the rear portion of the rail support is resting on the reinforced section of the fender flange.
  10. Assemble a J 28467-16 tube assembly (1) to each end of the J 28467-518, in line with the lift bracket and support bracket, using the J 28467-1 cross brackets.
  11. Install the J 28467-4A front support assemblies to the J 28467-16 using the J 28467-9 quick release pins. Ensure that the J 28467-16 are as level as possible by selecting the appropriate hole for the quick release pins.
  12. Install the J 28467-7A , as required, to lift the hook through the J 28467-6A lift hook bracket.
  13. Install the 1/2 inch lift hook washer and the J 28467-34 lift hook wing nut onto the J 28467-7A lift hook.
  14. Install the J 28467-6A (1) over the J 28467-16 (2).
  15. Adjust the J 28467-6A bracket (1) in order to align the hook with the left J 28467-86 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  16. Repeat the previous step for the right J 28467-15 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  17. Install each J 28467-7A through each engine lift bracket and engine support adapter. Ensure that the hooks do not damage the surrounding components.
  18. Hand-tighten the J 28467-34 securely to remove all slack from the engine support fixture assembly.
  19. The engine is now supported in vehicle to perform repairs that require front frame removal.
  20. The J 28467-87 is used to lift the engine once the engine is removed from the vehicle. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  21. Remove the ground strap from the right rear cylinder head and bolt the J 28467-87 in position. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  22. The J 28467-87 and the J 28467-86 can now be used to lift the engine. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Unscrew the lift hooks (1) and remove them from the lift bracket and the support brackets. Remove the lift hooks from the tube assemblies.
  2. Remove the front tube and support assemblies from the main support beam.
  3. Remove the main support beam assembly.
  4. Remove the J 28467-15 from the right cylinder head. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Install the front wire harness bracket bolt. Tighten: Tighten the wire harness bracket bolt to 45 N.m (33 lb ft).
  6. Remove the J 28467-86 from the left cylinder head. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  7. Install the push pin securing the wiring harness to the left cylinder head.
  8. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Engine Mount Inspection

  1. Install the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) . Raising the engine removes the weight from the engine mount and creates slight tension in the rubber.
  2. Observe the engine mount while raising the engine. Replace the engine mount if the engine mount exhibits any of the following conditions: The hard rubber surface is covered with heat check cracks. The rubber is separated from the metal plate of the engine mount. The rubber is split through the center of the engine mount. The GLYCOL™ fluid is leaking from the engine mount.
  3. If there is movement between the metal plate of the engine mount and its attaching points, lower the engine on the engine mount. Tighten the bolts or nuts attaching the engine mount to the frame or engine mount bracket. Refer to «Engine Mount Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Replacement - Right (w/RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Replacement - Right (w/AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the left engine mount bracket. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the lower engine mount retaining nut.
  4. Remove the engine mount from the vehicle.
  1. Install the engine mount to the vehicle.
  2. Install the engine mount lower retaining nuts. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  3. Install the left engine mount bracket. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Lower the vehicle.
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the right engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the engine mount retaining nut.
  4. Remove the engine mount from the vehicle.
  1. Install the engine mount to the vehicle.
  2. Install the engine mount retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  3. Install the right engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Lower the vehicle.
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the right engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the engine mount retaining nut.
  4. Remove the engine mount from the vehicle.
  1. Install the engine mount to the vehicle.
  2. Install the engine mount retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  3. Install the right engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Lower the vehicle.
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the left exhaust manifold. Refer to «Exhaust Manifold Removal - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-left) .
  3. Install a screw jack with a block of wood under the oil pan for support.
  4. Remove the upper engine mount retaining nut.
  5. Remove the left engine mount bracket retaining bolts.
  6. Remove the left engine mount bracket.
  1. Install the left engine mount brackets.
  2. Install the left engine mount bracket retaining bolts. Tighten: Tighten the bolts to 60 N.m (44 lb ft).
  3. Install the upper engine mount retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  4. Remove the screw jack.
  5. Install the left exhaust manifold. Refer to «Exhaust Manifold Removal - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-left) .
  6. Lower the vehicle.
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the right exhaust manifold. Refer to «Exhaust Manifold Removal - Right (RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-rwd) or «Exhaust Manifold Removal - Right (AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-awd) .
  3. Install a screw jack with a block of wood under the oil pan for support.
  4. Remove the right engine mount upper retaining nut.
  5. Remove the right engine mount bracket mounting bolts.
  6. Remove the engine mount bracket from the vehicle.
  1. Install the engine mount bracket to the vehicle.
  2. Install the engine mount bracket mounting bolts. Tighten: Tighten the bolts to 60 N.m (44 lb ft).
  3. Remove the screw jack.
  4. Install the upper engine mount retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  5. Install the right exhaust manifold. Refer to «Exhaust Manifold Removal - Right (RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-rwd) or «Exhaust Manifold Removal - Right (AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-awd) .
  6. Lower the vehicle.
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  2. Remove the right exhaust manifold. Refer to «Exhaust Manifold Removal - Right (RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-rwd) or «Exhaust Manifold Removal - Right (AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-awd) .
  3. Install a screw jack with a block of wood under the oil pan for support.
  4. Remove the right engine mount upper retaining nut.
  5. Remove the right engine mount bracket mounting bolts.
  6. Remove the engine mount bracket from the vehicle.
  1. Install the engine mount bracket to the vehicle.
  2. Install the engine mount bracket mounting bolts. Tighten: Tighten the bolts to 60 N.m (44 lb ft).
  3. Remove the screw jack.
  4. Install the upper engine mount retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
  5. Install the right exhaust manifold. Refer to «Exhaust Manifold Removal - Right (RWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-rwd) or «Exhaust Manifold Removal - Right (AWD)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__exhaust-manifold-removal-right-awd) .
  6. Lower the vehicle.
  1. Remove the cross car brace, if necessary. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. Clean the fuel injector sight shield at the power steering and engine oil fill cap locations.
  3. Remove the power steering and engine oil fill caps.
  4. Lift the sight shield up from the front and pull forward to disengage the rear tab from the bracket.
  5. Remove the front compartment sight shields, if necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Install the front compartment sight shield, if necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. Align the rear tab with the slot in the rear bracket and push the sight shield inward to engage.
  3. Push the sight shield down and align the ball studs on the engine with the holes in the sight shield.
  4. Install the power steering and engine oil fill caps.
  5. Install the cross car brace, if necessary. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Disconnect the PCV fresh air tube from the left camshaft cover.
  3. Remove the PCV fresh air tube from the air cleaner outlet duct.
  4. Remove the retaining clip securing the PCV dirty air tube.
  5. Disconnect the PCV dirty air tube from the PCV orificed tube.
  6. Remove the PCV dirty air tube from the intake manifold.
  1. Connect the PCV dirty air tube to the intake manifold fitting.
  2. Connect the PCV dirty air tube to the PCV orificed tube.
  3. Attach the retaining clip to the intake manifold.
  4. Connect the PCV fresh air tube to the left camshaft cover.
  5. Connect the PCV fresh air tube to the air cleaner outlet duct.
  6. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the cross car brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the PCV dirty air tube from the camshaft cover. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Remove the PCV fresh air tube. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  5. Remove the sight shield bracket nuts.
  6. Remove the sight shield bracket.
  7. Disconnect the left side fuel injector electrical connectors (1) from the fuel injectors (2).
  8. Disconnect the right side fuel injector electrical connectors (1) from the fuel injectors (2).
  9. Disconnect the evaporative emissions purge valve line (2) and electrical connector (1).
  10. Remove the EVAP line from the retaining feature (2) at the rear of the right head. Position the line aside.
  11. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  12. Disconnect the fuel line from the fuel rail (1). Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction__quick-connect-fittings-service-metal-collar) or «Quick Connect Fitting(s) Service (Plastic Collar)»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  13. Remove the fuel line from the retainer at the rear of the right head.
  14. Remove the fasteners attaching the fuel rail to the intake manifold.
  15. Lift the entire fuel rail and injector assembly from the intake manifold.
  16. Loosen the plenum duct clamp (1) at the front of the intake manifold.
  17. Loosen the bolts attaching the intake manifold to the cylinder heads.
  18. Remove the intake manifold by using an upward lifting motion at the rear of the manifold assembly.
  19. Inspect the intake manifold. Refer to «Intake Manifold Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  1. Transfer the necessary parts when replacing the intake manifold. Refer to «Intake Manifold Disassemble»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6__intake-manifold-disassemble) and «Intake Manifold Assemble»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6__intake-manifold-assemble) .
  2. Lightly grease the inside edge of the rubber plenum duct.
  3. Ensure that the NEW gaskets are installed to the intake manifold.
  4. Place the intake manifold in position.
  5. Position the front of the intake manifold into the plenum duct.
  6. Position the rear of the intake manifold downward onto the cylinder heads.
  7. Loosely install the 10 bolts attaching the intake manifold to the cylinder heads.
  8. Tighten the intake manifold bolts in sequence (1-10). Tighten: Tighten the intake manifold bolts to 10 N.m (89 lb in).
  9. Ensure that the plenum duct is fully attached to the front of the intake manifold. Tighten: Tighten the plenum duct clamp to 2.25 N.m (20 lb in).
  10. Lubricate the intake manifold fuel injector bores with light mineral oil GM P/N 9981704, clean engine oil or equivalent.
  11. Install the entire fuel rail and injector assembly into the intake manifold by pressing the fuel rail and injector simultaneously into the correct position.
  12. Install the bolts attaching the fuel rail to the intake manifold. Tighten: Tighten the fuel rail bolts to 10 N.m (89 lb in).
  13. Install the fuel line to the retainer at the rear of the right head.
  14. Connect the fuel line to the fuel rail (1). Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction__quick-connect-fittings-service-metal-collar) or «Quick Connect Fitting(s) Service (Plastic Collar)»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  15. Install the evaporative emissions purge valve line to the retainer (2) at the rear of the right head.
  16. Install the evaporative emissions purge valve line (2) and electrical connector (1).
  17. Connect the right side fuel injector electrical connectors (1) to the fuel injectors (2).
  18. Connect the left side fuel injector electrical connectors (1) to the fuel injectors (2).
  19. Install the sight shield bracket.
  20. Install the sight shield bracket nuts. Tighten: Tighten the sight shield bracket nuts to 10 N.m (89 lb in).
  21. Install the PCV fresh air tube to the engine.
  22. Install the PCV dirty air tube to the engine.
  23. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  24. Install the cross car brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Remove the front compartment sight shield as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. Remove the oil level indicator.
  3. Loosen the oil level indicator tube bolt.
  4. Pull the oil level indicator tube from the crankcase.
  1. Replace the oil level indicator tube O-ring.
  2. Install the oil level indicator tube.
  3. Install the oil level indicator tube bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
  4. Install the oil level indicator.
  5. Install the front compartment sight shield as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Remove the left engine mount bracket. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Disconnect the engine oil cooler lines from the adapter, if equipped.
  3. Disconnect the electrical connector from the engine oil pressure switch.
  4. Remove the oil filter.
  5. Remove the adapter mounting bolts.
  6. Remove the adapter and discard the gasket.
  7. Remove the engine oil pressure switch from the oil filter adapter.
  8. Clean and inspect the oil filter adapter. Refer to «Oil Filter Adapter Cleaning and Inspection (Without Oil Cooler)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) or «Oil Filter Adapter Cleaning and Inspection (With Oil Cooler)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Install the engine oil pressure switch to the oil filter adapter. Tighten: Tighten the engine oil pressure switch to 16 N.m (12 lb ft).
  2. Install the new gasket.
  3. Install the bolts attaching the oil filter adapter to the engine block. Tighten: Tighten the oil filter adapter bolts to 16 N.m (12 lb ft).
  4. Lightly oil the replacement oil filter gasket with clean oil.
  5. Install the oil filter. Tighten: Tighten the oil filter to 32 N.m (24 lb ft).
  6. Connect the electrical connector to the engine oil pressure switch.
  7. Connect the engine oil cooler lines to the adapter, if equipped.
  8. Install the left engine mount bracket. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  9. Lower the vehicle.
  10. Adjust the engine oil level to the full mark.
  11. Inspect for oil leaks after engine start up.

Crankshaft Balancer Replacement

Tools Required

  1. J 24420-C Crankshaft Balancer Remover
  2. J 38416-2 Crankshaft Button
  3. J 41998-B Crankshaft Balancer Installer
  4. J 45059 Angle Meter
  5. EN 46326 Flywheel Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the accessory drive belts. Refer to «Drive Belt Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) and to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the mechanical fan adapter, if equipped. Refer to «Engine Cooling Fan Bracket Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Cooling Fan Bracket Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  4. Remove the starter motor. Refer to «Starter Motor Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Motor Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  5. Install the EN 46326 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Remove the crankshaft balancer bolt.
  7. Place the J 38416-2 crankshaft button into the end of the crankshaft.
  8. Install the J 24420-C on the crankshaft balancer.
  9. Remove the crankshaft balancer using the J 24420-C .

Cleaning and Inspection

Clean and inspect the crankshaft balancer. Refer to Crankshaft Balancer Cleaning and Inspection .

  1. Position the crankshaft balancer on the nose of the crankshaft.
  2. Press the crankshaft balancer in place using the J 41998-B .
  3. Clean the crankshaft balancer bolt threads.
  4. Apply engine oil to the crankshaft balancer bolt threads.
  5. Install the crankshaft balancer bolt. Tighten: First Pass Tighten the bolt to 50 N.m (37 lb ft). Final Pass Tighten the bolt an additional 120 degrees using the J 45059 .
  6. Remove the EN 46326 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  7. Install the starter motor. Refer to «Starter Motor Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Motor Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  8. Install the mechanical fan adapter, if equipped. Refer to «Engine Cooling Fan Bracket Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Cooling Fan Bracket Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  9. Install the accessory drive belts. Refer to «Drive Belt Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) and to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  10. Lower the vehicle.

J 38185 Hose Clamp Pliers. See Special Tools .

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  2. Remove the air outlet duct in order to gain access to the thermostat housing. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  3. Remove the heater hose from the thermostat housing using a J 38185 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Remove the coolant radiator hose from the thermostat housing. Refer to «Coolant Bypass Hose Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  5. If equipped, remove the afterboil coolant pump. Refer to «Afterboil Coolant Pump Replacement»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  6. Remove the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) and to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  7. Remove the drive belt idler pulley bolt. Remove the drive belt idler pulley.
  8. Remove the water pump pulley.
  9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/sts/i-2004-2007/remont/hoistjack/#general-information) in General Information.
  10. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  11. Remove the engine front cover bolts.
  12. Remove the engine front cover.
  13. Remove and discard the engine front cover gasket.

Clean and inspect the engine front cover. Refer to Engine Front Cover Cleaning and Inspection .

  1. Place a small amount of sealant GM P/N 12578521 (Canadian P/N 88901148) or equivalent at the split line (1) of the upper and lower crankcases, and at the top of the block face.
  2. Place the NEW engine front cover gasket over the crankcase dowel pins.
  3. Place the engine front cover in position on the crankcase.
  4. Apply the thread locking compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the engine front cover bolts.
  5. Install the engine front cover retaining bolts.
  6. Tighten the engine front cover bolts in the sequence shown. Tighten: Tighten the engine front cover bolts in proper sequence to 15 N.m (11 lb ft).
  7. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  8. Install the water pump pulley. Tighten: Tighten the water pump pulley bolts to 10 N.m (89 lb in).
  9. Install the drive belt idler pulley.
  10. Install the drive belt idler pulley bolt. Tighten: Tighten the drive belt idler pulley bolt to 50 N.m (37 lb ft).
  11. Install the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) and to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  12. Install the coolant radiator hose to the thermostat housing. Refer to «Coolant Bypass Hose Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  13. Install the heater hose to the thermostat housing using a J 38185 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  14. If equipped, install the afterboil coolant pump. Refer to «Afterboil Coolant Pump Replacement»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
  15. Install the air outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  16. Fill the cooling system. Refer to «Draining and Filling Cooling System»(/cadillac/sts/i-2004-2007/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.

J 45059 Angle Meter

  1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the 3 oil pump assembly retaining bolts (1, 2, 3) identified by the larger head size.
  3. Slide the oil pump assembly off the nose of the crankshaft with the drive collar in place.
  4. Clean and inspect the oil pump. Refer to «Oil Pump Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Install the oil pump drive spacer (1) into the oil pump (2) so that the drive flat engages the pump rotor.
  2. Position the oil pump on the crankshaft.
  3. Install the retaining bolts.
  4. Apply upward pressure on the pump while tightening the three retaining bolts. Tighten the bolts in the sequence (1, 2, 3) shown. Tighten: First Pass Tighten the oil pump mounting bolts in sequence to 10 N.m (89 lb in). Final Pass Tighten the oil pump mounting bolts in sequence an additional 35 degrees using the J 45059 .
  5. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the oil filter adapter. Refer to «Oil Filter Adapter Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the oil pressure sensor and/or switch from the oil filter adapter.
  3. Clean and inspect the oil filter adapter. Refer to «Oil Filter Adapter Cleaning and Inspection (Without Oil Cooler)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) or «Oil Filter Adapter Cleaning and Inspection (With Oil Cooler)»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Install a new O-ring on the oil pressure switch.
  2. Install the oil pressure switch to the oil filter adapter. Tighten: Tighten the oil pressure sensor and/or switch to 16 N.m (12 lb ft).
  3. Install the oil filter adapter. Refer to «Oil Filter Adapter Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Drain the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6) .
  2. Disconnect the electrical connector from engine oil level switch.
  3. Remove the engine oil level switch from the oil pan.
  1. Install the engine oil level switch to the oil pan.
  2. Install the engine oil level switch bolt. Tighten: Tighten the engine oil level switch bolt to 10 N.m (89 lb in).
  3. Connect the electrical connector to engine oil level switch.
  4. Fill the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6) .
  5. Inspect for oil leaks after engine start up.
  1. Remove the engine oil pan. Refer to «Oil Pan Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6) .
  2. Remove the oil pump pipe support bracket nut.
  3. Remove the oil pump pipe bolt.
  4. Remove the oil pump pipe and screen assembly.
  5. Remove and discard the oil pump pipe gasket.
  1. Lubricate the silicone seal in the oil manifold plate. With a twisting motion, install the end of the oil pump pick-up tube.
  2. Install the oil pump pick-up retaining bolt and nut. Tighten: Tighten the oil pump pick-up tube nut to 24 N.m (18 lb ft). Tighten the oil pump pick-up tube bolt to 10 N.m (89 lb in).
  3. Install the oil pan. Refer to «Oil Pan Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6) .
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Disconnect the positive crankcase ventilation (PCV) fresh air tube from the left camshaft cover.
  3. Remove the left side ignition module. Refer to «Ignition Control Module Replacement - Bank 2»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  4. Remove the bolt connecting the ground strap to the left camshaft cover.
  5. Remove the bolt securing the oil level indicator tube to the left cylinder head and reposition the tube away from the camshaft cover.
  6. Remove the camshaft cover bolts.
  7. Lift the camshaft drive end of the camshaft cover up.
  8. Remove the camshaft cover.
  9. Discard the camshaft cover gasket and spark plug port seals if there is any evidence of damage or if the seal comes out of the groove in the cover during removal.
  10. Clean the gasket mating surface on the cylinder head.
  11. Clean and inspect the camshaft cover. Refer to «Camshaft Cover Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  1. Install a new camshaft cover gasket to the camshaft cover if necessary.
  2. Place a small amount of sealant GM P/N 12345739 (Canadian P/N 10953541) or equivalent at the split line (1, 2) of the left cylinder head and the left camshaft position actuator housing.
  3. Work the camshaft cover into position by pivoting the cover down and aligning the bolt holes.
  4. Install the camshaft cover bolts. Tighten: Tighten the camshaft cover bolts to 10 N.m (89 lb in).
  5. Install the bolt connecting the left camshaft cover ground strap to the left camshaft cover. Tighten: Tighten the left ground strap bolt to 10 N.m (89 lb in).
  6. Rotate the oil level indicator tube back into its original position and install the bolt securing the tube to the cylinder head. Tighten: Tighten the oil level indicator tube bolt to 10 N.m (89 lb in).
  7. Install the ignition module. Refer to «Ignition Control Module Replacement - Bank 2»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  8. Connect the PCV fresh air tube to the left camshaft cover.
  9. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Disconnect the positive crankcase ventilation (PCV) dirty air tube from the camshaft cover.
  3. Remove the ignition module. Refer to «Ignition Control Module Replacement - Bank 1»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L (LH2).
  4. Disconnect the cable harness clips at the front of the camshaft cover and position the cable harness aside.
  5. Remove the bolt connecting the ground strap to the right camshaft cover.
  6. Remove the camshaft cover bolts.
  7. Remove the camshaft cover.
  8. Discard the camshaft cover gasket and spark plug port seals if there is any evidence of damage or if the seal comes out of the groove in the cover during removal.
  9. Clean and inspect the camshaft cover. Refer to «Camshaft Cover Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  1. Install the camshaft cover gasket as required.
  2. Place a small amount of sealant GM P/N 12345739 (Canadian P/N 10953541) or equivalent at the split line (1, 2) of the right cylinder head and the right camshaft position actuator housing.
  3. Install the camshaft cover.
  4. Install the camshaft cover bolts installing the ground strap to the camshaft cover. Tighten: Tighten the camshaft cover bolts to 10 N.m (89 lb in).
  5. Install the ignition module. Refer to «Ignition Control Module Replacement - Bank 1»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) in Engine Controls - 4.6L.
  6. Connect the PCV dirty air tube to the camshaft cover.
  7. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the left exhaust camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  3. Remove the left intake camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  4. Remove the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/manual-power-steering/#power-steering-system) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
  5. Remove the left camshaft cover. Refer to «Camshaft Cover Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  6. Remove the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  7. Remove the left intake camshaft position actuator solenoid bolts.
  8. Remove the left intake camshaft position actuator solenoid.
  9. Remove the left intake camshaft position actuator solenoid alignment plug and discard.
  10. Remove the left exhaust camshaft position actuator solenoid bolts.
  11. Remove the left exhaust camshaft position actuator solenoid.
  12. Remove the left exhaust camshaft position actuator solenoid alignment plug and discard.
  13. Remove the left camshaft position actuator housing bolts.
  14. Remove the left camshaft position actuator housing.
  1. Install a NEW gasket to the camshaft position actuator housing.
  2. Install the left camshaft position actuator housing to the left cylinder head.
  3. Install the actuator housing bolts and studs. Tighten: Tighten the actuator housing bolts and studs to 10 N.m (89 lb in).
  4. To allow for camshaft position actuator solenoid to camshaft position actuator oil control valve alignment, DO NOT install NEW camshaft position actuator solenoid alignment plugs at this time.
  5. Use the following procedure for the camshaft position actuator solenoid alignment: Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long. Verify that the alignment pin will pass through the camshaft position actuator solenoid alignment hole. Verify that the alignment pin will fit into the alignment hole in the camshaft position actuator oil control valve. Apply a 2 mm (0.079 in) bead of RTV GM P/N 12378521 (Canadian P/N 88901148) around the flange of the camshaft position actuator solenoid. Install the camshaft position actuator solenoid over the oil control valve. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole. With the alignment pin in place, install the camshaft position actuator solenoid bolts. Tighten: Tighten the camshaft position actuator solenoid bolts to 8 N.m (71 lb in). Remove the alignment pin. Install a NEW camshaft position actuator solenoid plug. Repeat steps 4 through 9 for the exhaust camshaft position actuator solenoid.
  6. Install the left camshaft cover. Refer to «Camshaft Cover Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  7. Install the left intake camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  8. Install the left exhaust camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  9. Install the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  10. Install the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(/cadillac/sts/i-2004-2007/remont/manual-power-steering/#power-steering-system) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(/cadillac/sts/i-2004-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
  11. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the right exhaust camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 1 (Right) Exhaust»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  3. Remove the right intake camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 1 (Right) Intake»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  4. Remove the right camshaft cover. Refer to «Camshaft Cover Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  5. Remove the cam sensor harness from the retainers.
  6. Remove the right intake camshaft position actuator solenoid bolts.
  7. Remove the right intake camshaft position actuator solenoid.
  8. Remove the right intake camshaft position actuator solenoid alignment plug and discard.
  9. Remove the right exhaust camshaft position actuator solenoid bolts.
  10. Remove the right exhaust camshaft position actuator solenoid.
  11. Remove the right exhaust camshaft position actuator solenoid alignment plug and discard.
  12. Remove the right camshaft position actuator housing bolts.
  13. Remove the right camshaft position actuator housing.
  1. Install a NEW gasket to the camshaft position actuator housing.
  2. Install the right camshaft position actuator housing to the right cylinder head.
  3. Install the actuator housing bolts and studs. Tighten: Tighten the actuator housing bolts and studs to 10 N.m (89 lb in).
  4. To allow for camshaft position actuator solenoid to camshaft position actuator oil control valve alignment, DO NOT install NEW camshaft position actuator solenoid alignment plugs at this time.
  5. Use the following procedure for the camshaft position actuator solenoid alignment: Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long. Verify that the alignment pin will pass through the camshaft position actuator solenoid alignment hole. Verify that the alignment pin will fit into the alignment hole in the camshaft position actuator oil control valve. Apply a 2 mm (0.079 in) bead of RTV GM P/N 12378521 (Canadian P/N 88901148) around the flange of the camshaft position actuator solenoid. Install the camshaft position actuator solenoid over the oil control valve. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole. With the alignment pin in place, install the camshaft position actuator solenoid bolts. Tighten: Tighten the camshaft position actuator solenoid bolts to 8 N.m (71 lb in). Remove the alignment pin. Install a NEW camshaft position actuator solenoid plug. Repeat steps 4 through 9 for the exhaust camshaft position actuator solenoid.
  6. Install the right camshaft cover. Refer to «Camshaft Cover Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  7. Install the right intake camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 1 (Right) Intake»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  8. Install the right exhaust camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement - Bank 1 (Right) Exhaust»(/cadillac/sts/i-2004-2007/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction) .
  9. Install the camshaft sensor harness to the retainers.
  10. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Replacement - Left

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the right secondary timing chain. Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  2. Using the J 39946 , rotate the crankshaft until the primary timing gear alignment marks (1) are adjacent to each other as shown. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. Remove the left camshaft position actuator housing. DO NOT remove the actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Install the EN 46328 (1) on the bank 2 (left) camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Loosen and remove the left secondary timing chain tensioner bolts and tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  6. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
  7. Loosen and remove the bank 2 (left) exhaust camshaft position oil control valve.
  8. Slide the left exhaust camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.
  9. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
  10. Loosen and remove the bank 2 (left) intake camshaft position oil control valve.
  11. Slide the left intake camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.
  12. Remove the left secondary timing chain from the engine.
  13. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. The secondary timing chain (2) has 3 black links that aid in timing the camshaft position actuators to the intermediate sprocket.
  2. The black link (4) is aligned with the bank 2 exhaust actuator timing mark. The black link (3) is aligned with the bank 2 intake actuator timing mark.
  3. The black link (1) is aligned with the intermediate sprocket.
  4. The intermediate sprocket left bank timing mark is labeled left bank (LB) as shown.
  5. Assemble the secondary timing chain to the intermediate sprocket aligning the sprocket LB timing mark to the timing chain black link.
  6. Align the timing mark (5) of the LB intake camshaft position actuator with the timing chain black link (3) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation.
  7. Loosely install the oil control valve (10) to secure the intake actuator.
  8. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  9. Align the timing mark (7) of the LB exhaust camshaft position actuator with the timing chain black link (4) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation.
  10. Loosely install the oil control valve (8) to secure the exhaust actuator.
  11. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  12. Install the left secondary timing chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  13. Install the right secondary timing chain. Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  14. Remove the EN 46328 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  15. Install the left camshaft position actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Replacement - Right

Tools Required

  1. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Using the J 39946 , rotate the crankshaft until the primary timing gear marks (1) are adjacent to each other as shown. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. Remove the right camshaft position actuator housing. DO NOT remove the actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Install the EN 46328 (1) on the bank 1 (right) camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Loosen and remove the right secondary timing chain tensioner bolts and tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  6. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
  7. Loosen and remove the bank 1 (right) exhaust camshaft position oil control valve.
  8. Slide the right exhaust camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.
  9. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
  10. Loosen and remove the bank 1 (right) intake camshaft position oil control valve.
  11. Slide the right intake camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.
  12. Remove the right secondary timing chain from the engine.
  13. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. The secondary timing chain has 3 black links that aid in timing the camshaft position actuators to the intermediate sprocket.
  2. The black link (2) is aligned with the bank 1 exhaust actuator timing mark. The black link (3) is aligned with the bank 1 intake actuator timing mark.
  3. The black link (1) is aligned with the intermediate sprocket.
  4. The intermediate sprocket right bank timing mark is labeled right bank (RB) as shown.
  5. Assemble the secondary timing chain to the intermediate sprocket aligning the sprocket RB timing mark to the timing chain black link.
  6. Align the timing mark (5) of the RB intake camshaft position actuator with the timing chain black link (8) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface near the top of its rotation.
  7. Loosely install the oil control valve (2) to secure the intake actuator.
  8. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  9. Align the timing mark (3) of the RB exhaust camshaft position actuator with the timing chain black link and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface near the top of its rotation.
  10. Loosely install the oil control valve (1) to secure the exhaust actuator.
  11. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  12. Install the right secondary timing chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  13. Remove the EN 46328 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  14. Install the right camshaft position actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  15. Install the oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Tensioner Replacement - Left

Tools Required

  1. J 39946 Crankshaft Rotation Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the left camshaft cover. Refer to «Camshaft Cover Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Align the primary timing marks (1) using the J 39946 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) on the left bank camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Create two reference marks (1) using a paint stick to identify the chain link adjacent to each actuator timing mark (2, 3).
  6. Remove the 2 bolts attaching the left secondary camshaft drive chain tensioner to the engine block.
  7. Remove the left secondary camshaft drive chain tensioner, allowing the tensioner to expand as you remove it.
  8. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Collapse the left secondary camshaft chain tensioner using the following procedure: Rotate the ratchet release lever (2) counterclockwise and hold. Collapse the tensioner shoe (1) and hold. Release the ratchet lever (2).
  2. Slowly release the pressure on the shoe (1), until the ratchet lever (2) moves to the first detent and a "click" is heard and felt.
  3. Collapse the tensioner shoe (1) and hold.
  4. Insert a pin through the hole in the release lever in order to lock the tensioner shoe in the collapsed position.
  5. Install the left secondary camshaft drive chain tensioner and retaining bolts. Tighten: Tighten the secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
  6. Remove the pin holding the tensioner to tighten any slack in the timing chain.
  7. Inspect the two paint marks created previously to ensure they remain aligned with the timing marks (1, 2) on the actuator.
  8. Install the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  9. Remove the EN 46328 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  10. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Tensioner Replacement - Right

Tools Required

  1. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. J 39946 Crankshaft Socket - 4.0L and 4.6L
  1. Remove the right camshaft cover. Refer to «Camshaft Cover Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Align the primary timing marks (1) using the J 39946 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) on the right bank camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Create two reference marks (1) using a paint stick to identify the chain link adjacent to each actuator timing mark (2, 3).
  6. Install an engine front cover bolt (2) into the front of the engine.
  7. Wrap mechanics wire (1) tightly around both the right secondary camshaft drive chain shoe (3) and the front cover bolt (2).
  8. Remove the 2 bolts attaching the right secondary camshaft drive chain tensioner to the engine block.
  9. Remove the right secondary camshaft drive chain tensioner, allowing the tensioner to expand as you remove it.
  10. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Collapse the right secondary camshaft chain tensioner using the following procedure: Rotate the ratchet release lever (2) counterclockwise and hold. Collapse the tensioner shoe (1) and hold. Release the ratchet lever (2).
  2. Slowly release the pressure on the shoe (1), until the ratchet lever (2) moves to the first detent and a "click" is heard and felt.
  3. Collapse the tensioner shoe (1) and hold.
  4. Insert a pin through the hole in the release lever in order to lock the tensioner shoe in the collapsed position.
  5. Install the right secondary camshaft drive chain tensioner and retaining bolts. Tighten: Tighten the secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
  6. Remove the pin holding the tensioner to tighten any slack in the timing chain.
  7. Inspect the two paint marks (1, 3) created previously to ensure they remain aligned with the timing marks (2, 4) on the actuator.
  8. Remove the mechanics wire (1) supporting the right secondary camshaft drive chain shoe (3).
  9. Remove the engine front cover bolt (2) from the front of the engine.
  10. Install the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  11. Remove the EN 46328 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  12. Install the right camshaft cover. Refer to «Camshaft Cover Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Shoe Replacement - Left

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the left secondary camshaft tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  2. Remove the left camshaft position actuator housing. DO NOT remove the camshaft actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Using the J 39946 , rotate the crankshaft until both camshaft position actuator timing marks (5, 7) are at the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2).
  6. Use a paint stick to create a mark on a primary chain link and intermediate primary chain sprocket tooth adjacent to the primary chain link.
  7. Use an open end wrench on the hex cast into the left intake camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  8. Loosen and remove the left intake oil control valve.
  9. Slide the left intake camshaft actuator off of the camshaft, disengage the sprocket teeth from the secondary timing chain, and remove the actuator.
  10. Remove the left secondary camshaft drive timing chain shoe bolt.
  11. Remove the left secondary camshaft drive timing shoe.
  12. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Position the left secondary camshaft drive chain shoe in through the left front cylinder head as shown.
  2. Install the left secondary camshaft drive chain shoe bolt. Tighten: Tighten the secondary camshaft drive chain shoe bolt to 25 N.m (18 lb ft).
  3. Install the left intake actuator to the secondary chain, ensuring that the actuator timing mark is aligned with the chain link that was marked during disassembly.
  4. Loosely install the oil control valve to secure the intake actuator to the camshaft.
  5. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  6. Install the left secondary camshaft drive chain tensioner. Refer to «Secondary Camshaft Drive Chain Guide Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-guide-replacement) .
  7. Ensure that the previously created paint marks (1, 3) still line up with the sprocket timing marks (2, 4).
  8. Install the left camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Shoe Replacement - Right

Tools Required

  1. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the right secondary camshaft tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  2. Remove the right camshaft position actuator housing. DO NOT remove the camshaft actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Using the J 39946 , rotate the crankshaft until both camshaft position actuator timing marks (3, 5) are at the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Use a paint stick to create a mark on a primary chain link and intermediate primary chain sprocket tooth adjacent to the primary chain link.
  7. Use an open end wrench on the hex cast into the right exhaust camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  8. Loosen and remove the right exhaust oil control valve.
  9. Slide the right exhaust camshaft actuator off of the camshaft, disengage the sprocket teeth from the secondary timing chain, and remove the actuator.
  10. Remove the right secondary camshaft drive timing chain shoe bolt.
  11. Remove the right secondary camshaft drive timing chain shoe.
  12. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Position the right secondary camshaft drive timing chain shoe in through the right front cylinder head as shown.
  2. Install the right secondary camshaft drive chain shoe bolt. Tighten: Tighten the secondary camshaft drive chain shoe bolt to 25 N.m (18 lb ft).
  3. Install the right exhaust actuator to the secondary chain, ensuring that the actuator timing mark is aligned with the chain link that was marked during disassembly.
  4. Loosely install the oil control valve to secure the exhaust actuator to the camshaft.
  5. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  6. Install the right secondary camshaft drive chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  7. Ensure that the previously created paint marks (1, 3) still line up with the sprocket timing marks (2, 4).
  8. Install the right camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Guide Replacement - Left

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the left secondary camshaft tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  2. Remove the left camshaft position actuator housing. DO NOT remove the camshaft actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Using the J 39946 , rotate the crankshaft until both camshaft position actuator timing marks (5, 7) are at the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Use a paint stick to create a mark on a primary chain link and intermediate primary chain sprocket tooth adjacent to the primary chain link.
  7. Use an open end wrench on the hex cast into the left exhaust camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  8. Loosen and remove the left exhaust oil control valve.
  9. Slide the left exhaust camshaft actuator off of the camshaft, disengage the sprocket teeth from the secondary timing chain, and remove the actuator.
  10. Remove the secondary camshaft drive chain guide bolt.
  11. Remove the left secondary camshaft drive chain guide.
  12. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Position the left secondary camshaft drive chain guide in through the left front cylinder head as shown.
  2. Install the left secondary camshaft drive chain guide bolt. Tighten: Tighten the secondary camshaft drive chain guide bolt to 25 N.m (18 lb ft).
  3. Install the left exhaust actuator to the secondary chain, ensuring that the actuator timing mark is aligned with the chain link that was marked during disassembly.
  4. Loosely install the oil control valve to secure the exhaust actuator to the camshaft.
  5. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  6. Install the left secondary camshaft drive chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  7. Ensure that the previously created paint marks (1, 3) still line up with the sprocket timing marks (2, 4).
  8. Install the left camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Secondary Camshaft Drive Chain Guide Replacement - Right

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the right secondary camshaft tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  2. Remove the right camshaft position actuator housing. DO NOT remove the camshaft actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Using the J 39946 , rotate the crankshaft until both camshaft position actuator timing marks (3, 5) are at the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Use a paint stick to create a mark on a primary chain link and intermediate primary chain sprocket tooth adjacent to the primary chain link.
  7. Use an open end wrench on the hex cast into the right intake camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  8. Loosen and remove the right intake oil control valve.
  9. Slide the right intake camshaft actuator off of the camshaft, disengage the sprocket teeth from the secondary timing chain, and remove the actuator.
  10. Remove the secondary camshaft drive chain guide bolt.
  11. Remove the right secondary camshaft drive chain guide.
  12. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Position the right secondary camshaft drive chain guide in through the right front cylinder head as shown.
  2. Install the right secondary camshaft drive chain guide bolt. Tighten: Tighten the secondary camshaft drive chain guide bolt to 25 N.m (18 lb ft).
  3. Install the right intake actuator to the secondary chain, ensuring that the actuator timing mark is aligned with the chain link that was marked during disassembly.
  4. Loosely install the oil control valve to secure the intake actuator to the camshaft.
  5. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  6. Install the right secondary camshaft drive chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  7. Ensure that the previously created paint marks (1, 3) still line up with the sprocket timing marks (2, 4).
  8. Install the right camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

J 39946 Crankshaft Socket. See Special Tools .

  1. Remove the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Align the primary timing marks (1) using the J 39946 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. Remove the 2 bolts attaching the primary camshaft drive chain tensioner to the engine block.
  4. Remove the primary camshaft drive chain tensioner, allowing the tensioner to expand as you remove it.
  5. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Collapse the primary camshaft drive chain tensioner using the following procedure: Rotate the ratchet release lever (2) clockwise and hold. Collapse the tensioner shoe (1) and hold. Release the ratchet lever (2).
  2. Slowly release the pressure on the shoe (1), until the ratchet lever (2) moves to the first detent and a click is heard and felt.
  3. Collapse the tensioner shoe (1) and hold.
  4. Insert a pin through the hole in the release lever in order to lock the tensioner shoe in the collapsed position.
  5. Install the primary camshaft drive chain tensioner and retaining bolts. Tighten: Tighten the primary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
  6. Remove the pin holding the tensioner to tighten any slack in the timing chain.
  7. Ensure the primary timing marks (1) are aligned vertically.
  8. Install the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the right side secondary camshaft drive chain (4). Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  2. Remove the left side secondary camshaft drive chain (2). Refer to «Secondary Camshaft Drive Chain Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  3. Remove the right side secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-shoe-replacement) .
  4. Remove the right side secondary camshaft drive chain guide. Refer to «Secondary Camshaft Drive Chain Guide Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-guide-replacement) .
  5. Remove the left side secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-shoe-replacement) .
  6. Remove the left side secondary camshaft drive chain guide. Refer to «Secondary Camshaft Drive Chain Guide Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-guide-replacement) .
  7. Remove the oil outlet tube (4) from the engine. Refer to «Oil Outlet Tube Removal»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__oil-outlet-tube-removal) .
  8. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Drive Chain Tensioner Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  9. Remove the bolts attaching the primary camshaft drive chain guide to the engine block.
  10. Remove the primary camshaft drive chain guide.
  11. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Install the primary camshaft drive chain guide and retaining bolts. Tighten: Tighten the primary camshaft drive chain guide bolts to 25 N.m (18 lb ft).
  2. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Drive Chain Tensioner Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Install the oil outlet tube (4) to the engine. Refer to «Oil Outlet Tube Installation»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6__oil-outlet-tube-installation) .
  4. Install the left side secondary camshaft drive chain guide. Refer to «Secondary Camshaft Drive Chain Guide Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-guide-replacement) .
  5. Install the left side secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-shoe-replacement) .
  6. Install the right side secondary camshaft drive chain guide. Refer to «Secondary Camshaft Drive Chain Guide Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-guide-replacement) .
  7. Install the right side secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-shoe-replacement) .
  8. Install the left side secondary camshaft drive chain (2). Refer to «Secondary Camshaft Drive Chain Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  9. Install the right side secondary camshaft drive chain (4). Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .

J 39946 Crankshaft Socket. See Special Tools .

  1. Remove the oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Align the primary timing marks (1) using the J 39946 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. Remove the secondary camshaft drive chains. Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) and «Secondary Camshaft Drive Chain Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  4. Remove the primary drive chain tensioner. Refer to «Primary Camshaft Drive Chain Tensioner Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  5. Remove the oil outlet tube (4).
  6. Remove the primary camshaft drive chain guide bolts and guide.
  7. Remove the camshaft intermediate sprocket retaining bolt.
  8. Remove the following as an assembly: The primary camshaft drive chain (3) The crankshaft sprocket The camshaft intermediate sprocket
  9. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Align the timing marks (1) of the camshaft intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
  2. Install the primary camshaft drive chain on the drive sprockets.
  3. Use the J 39946 to rotate the crankshaft until the crankshaft keyway is approximately at the 1 o'clock position. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the following as an assembly: The primary camshaft drive chain (3) The crankshaft sprocket The camshaft intermediate sprocket
  5. Install the camshaft intermediate sprocket retaining bolt. Tighten: Tighten the camshaft intermediate sprocket retaining bolt to 60 N.m (44 lb ft).
  6. Install the primary drive chain guide.
  7. Install the primary drive chain guide bolts. Tighten: Tighten the primary drive chain guide bolts to 25 N.m (18 lb ft).
  8. Install the primary drive chain tensioner. Refer to «Primary Camshaft Drive Chain Tensioner Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  9. Install the oil outlet tube (4) and bolts. Tighten: Tighten the oil outlet tube bolts to 10 N.m (89 lb in).
  10. Install the secondary camshaft drive chains. Refer to «Secondary Camshaft Drive Chain Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) and «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  11. Remove the pin from the primary timing chain tensioner release lever.
  12. Ensure the primary timing marks (1) are aligned vertically.
  13. Install the oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the camshaft intermediate drive shaft sprocket. Refer to «Primary Camshaft Drive Chain and Sprockets Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the camshaft intermediate drive shaft retaining bolts.
  3. Remove the camshaft intermediate drive shaft from the engine.
  4. Clean and inspect the camshaft intermediate driveshaft. Refer to «Camshaft Intermediate Drive Shaft Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Position the camshaft intermediate drive shaft to the engine, aligning the bolt holes.
  2. Install the camshaft intermediate drive shaft retaining bolts. Tighten: Tighten the camshaft intermediate drive shaft retaining bolts to 10 N.m (89 lb in).
  3. Install the camshaft intermediate drive shaft sprocket. Refer to «Primary Camshaft Drive Chain and Sprockets Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Intake

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46327 Timing Chain Retention Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the right actuator housing. DO NOT remove the camshaft position (CMP) actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  3. Using the J 39946 , rotate the crankshaft until both bank 1 (right) CMP actuator timing marks are perpendicular (90 degrees) to the cylinder head deck surface and near the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Install the EN 46327 (1) using the installation of the EN 46327 timing chain retention tool procedure. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .

Installation of the EN 46327 Timing Chain Retention Tool - Right Bank

  1. Rotate the wing nut (3) of the EN 46327 to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. Position the bottom retention tool on the cylinder head with the V-notch of the block (1) adjacent to the right exhaust camshaft actuator timing sprocket and chain as shown.
  3. Insert the hook end (2) into a secondary timing chain link as shown.
  4. Rotate the wing nut until it contacts the retention tool block (1). DO NOT tighten the wing nut at this time.
  5. Rotate the wing nut of the EN 46327 (4) to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Position the top retention tool on the cylinder head with the V-notch of the block (1) adjacent to the right intake camshaft actuator timing sprocket and chain as shown.
  7. Insert the hook end (2) into a secondary timing chain link as shown.
  8. Rotate the wing nut until it contacts the retention tool block (1). Alternately tighten both wing nuts to retain the chain.
  9. Use an open end wrench on the hex cast into the right intake camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  10. Loosen and remove the right intake oil control valve (2).
  1. Install the oil control valve through the opening in the right intake camshaft position actuator and thread it into the right intake camshaft.
  2. Ensure both camshaft actuator timing marks (1, 3) are aligned with the paint marks on the secondary timing chain previously created.
  3. Use an open end wrench on the hex cast into the right intake camshaft to prevent the camshaft from rotating when tightening the camshaft oil control valve. Tighten: Tighten the camshaft oil control valve to 120 N.m (89 lb ft).
  4. Remove the EN 46327 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Remove the EN 46328 (1) from the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  7. Install the right camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Exhaust

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46327 Timing Chain Retention Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the right actuator housing. DO NOT remove the camshaft position (CMP) actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  3. Using the J 39946 , rotate the crankshaft until both bank 1 (right) CMP actuator timing marks are perpendicular (90 degrees) to the cylinder head deck surface and near the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Install the EN 46327 (1) using the installation of the EN 46327 timing chain retention tool procedure. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Rotate the wing nut (3) of the EN 46327 to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. Position the bottom retention tool on the cylinder head with the V-notch of the block (1) adjacent to the right exhaust camshaft actuator timing sprocket and chain as shown.
  3. Insert the hook end (2) into a secondary timing chain link as shown.
  4. Rotate the wing nut until it contacts the retention tool block (1). DO NOT tighten the wing nut at this time.
  5. Rotate the wing nut of the EN 46327 (4) to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Position the top retention tool on the cylinder head with the V-notch of the block (1) adjacent to the right intake camshaft actuator timing sprocket and chain as shown.
  7. Insert the hook end (2) into a secondary timing chain link as shown.
  8. Rotate the wing nut until it contacts the retention tool block (1). Alternately tighten both wing nuts to retain the chain.
  9. Use an open end wrench on the hex cast into the right exhaust camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  10. Loosen and remove the right exhaust oil control valve (1).
  1. Install the oil control valve through the opening in the right exhaust camshaft position actuator and thread it into the right exhaust camshaft.
  2. Ensure both camshaft actuator timing marks (1, 3) are aligned with the paint marks on the secondary timing chain previously created.
  3. Use an open end wrench on the hex cast into the right exhaust camshaft to prevent the camshaft from rotating when tightening the camshaft oil control valve. Tighten: Tighten the camshaft oil control valve to 120 N.m (89 lb ft).
  4. Remove the EN 46327 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Remove the EN 46328 (1) from the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  7. Install the right camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Intake

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46327 Timing Chain Retention Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the left actuator housing. DO NOT remove the camshaft position (CMP) actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  3. Using the J 39946 , rotate the crankshaft until both bank 2 (left) CMP actuator timing marks are perpendicular (90 degrees) to the cylinder head deck surface and near the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Install the EN 46327 (1) using the installation of the EN 46327 timing chain retention tool procedure. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .

Installation of the EN 46327 Timing Chain Retention Tool - Left Bank

  1. Rotate the wing nut (3) of the EN 46327 to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. Position the bottom retention tool on the cylinder head with the V-notch of the block (1) adjacent to the left exhaust camshaft actuator timing sprocket and chain as shown.
  3. Insert the hook end (2) into a secondary timing chain link as shown.
  4. Rotate the wing nut until it contacts the retention tool block (1). DO NOT tighten the wing nut at this time.
  5. Rotate the wing nut of the EN 46327 (4) to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Position the top retention tool on the cylinder head with the V-notch of the block (1) adjacent to the left intake camshaft actuator timing sprocket and chain as shown.
  7. Insert the hook end (2) into a secondary timing chain link as shown.
  8. Rotate the wing nut until it contacts the retention tool block (1). Alternately tighten both wing nuts to retain the chain.
  9. Use an open end wrench on the hex cast into the left intake camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  10. Loosen and remove the left intake oil control valve (10).
  1. Install the oil control valve through the opening in the left intake camshaft position actuator and thread it into the left intake camshaft.
  2. Ensure both camshaft actuator timing marks (1, 3) are aligned with the paint marks on the secondary timing chain previously created.
  3. Use an open end wrench on the hex cast into the left intake camshaft to prevent the camshaft from rotating when tightening the camshaft oil control valve. Tighten: Tighten the camshaft oil control valve to 120 N.m (89 lb ft).
  4. Remove the EN 46327 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Remove the EN 46328 (1) from the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  7. Install the left camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Exhaust

Tools Required

  1. J 39946 Crankshaft Socket. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. EN 46327 Timing Chain Retention Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. EN 46328 Camshaft Holding Tool. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Remove the left actuator housing. DO NOT remove the camshaft position (CMP) actuator solenoids from the housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  3. Using the J 39946 , rotate the crankshaft until both bank 2 (left) CMP actuator timing marks are perpendicular (90 degrees) to the cylinder head deck surface and near the top of their rotation. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  4. Install the EN 46328 (1) to the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
  6. Install the EN 46327 (1) using the installation of the EN 46327 timing chain retention tool procedure. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  1. Rotate the wing nut (3) of the EN 46327 to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  2. Position the bottom retention tool on the cylinder head with the V-notch of the block (1) adjacent to the left exhaust camshaft actuator timing sprocket and chain as shown.
  3. Insert the hook end (2) into a secondary timing chain link as shown.
  4. Rotate the wing nut until it contacts the retention tool block (1). DO NOT tighten the wing nut at this time.
  5. Rotate the wing nut of the EN 46327 (4) to the top of its travel. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Position the top retention tool on the cylinder head with the V-notch of the block (1) adjacent to the left intake camshaft actuator timing sprocket and chain as shown.
  7. Insert the hook end (2) into a secondary timing chain link as shown.
  8. Rotate the wing nut until it contacts the retention tool block (1). Alternately tighten both wing nuts to retain the chain.
  9. Use an open end wrench on the hex cast into the left exhaust camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.
  10. Loosen and remove the left exhaust oil control valve (8).
  1. Install the oil control valve through the opening in the left exhaust camshaft position actuator and thread it into the left exhaust camshaft.
  2. Ensure both camshaft actuator timing marks (1, 3) are aligned with the paint marks on the secondary timing chain previously created.
  3. Use an open end wrench on the hex cast into the left exhaust camshaft to prevent the camshaft from rotating when tightening the camshaft oil control valve. Tighten: Tighten the camshaft oil control valve to 120 N.m (89 lb ft).
  4. Remove the EN 46327 (1). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  5. Remove the EN 46328 (1) from the camshafts (2). See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  6. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__crankshaft-balancer-replacement) .
  7. Install the left camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the right intake camshaft position actuator oil control valve (2). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  2. Pull the actuator forward to disengage the actuator from the camshaft alignment pin.
  3. Disengage the secondary timing chain from the actuator and remove the actuator.
  4. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Locate the camshaft alignment pin hole (2) on the back of the actuator. This hole will mate with the camshaft alignment pin.
  2. Locate the timing alignment mark (1) on the front of the actuator.
  3. Engage the actuator timing gear teeth with the secondary timing chain ensuring that the actuator alignment mark (5) corresponds with the paint mark created on the chain link.
  4. Slide the actuator over the camshaft alignment pin and install the actuator onto the camshaft.
  5. Install the right intake camshaft position actuator oil control valve. Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  1. Remove the right exhaust camshaft position actuator oil control valve (1). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  2. Pull the actuator forward to disengage the actuator from the camshaft alignment pin.
  3. Disengage the secondary timing chain from the actuator and remove the actuator.
  4. Clean and inspect the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Locate the camshaft alignment pin hole (2) on the back of the actuator. This hole will mate with the camshaft alignment pin.
  2. Locate the timing alignment mark (1) on the front of the actuator.
  3. Engage the actuator timing gear teeth with the secondary timing chain ensuring that the actuator alignment mark (3) corresponds with the paint mark created on the chain link.
  4. Slide the actuator over the camshaft alignment pin and install the actuator onto the camshaft.
  5. Install the right exhaust camshaft position actuator oil control valve. Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  1. Remove the left intake camshaft position actuator oil control valve (10). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  2. Pull the actuator forward to disengage the camshaft alignment pin from the actuator.
  3. Disengage the secondary timing chain from the actuator and remove the actuator.
  1. Locate the camshaft alignment pin hole (2) on the back of the actuator.
  2. Locate the timing alignment mark (1) on the front of the actuator.
  3. Engage the actuator timing gear teeth with the secondary timing chain ensuring that the actuator alignment mark (5) corresponds with the paint mark created on the chain link.
  4. Slide the actuator over the camshaft alignment pin and install the actuator onto the camshaft.
  5. Install the left intake camshaft position actuator oil control valve (10). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  1. Remove the left exhaust camshaft position actuator oil control valve (8). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .
  2. Pull the actuator forward to disengage the camshaft alignment pin from the actuator.
  3. Disengage the secondary timing chain from the actuator and remove the actuator.
  1. Locate the camshaft alignment pin hole (2) on the back of the actuator.
  2. Locate the timing alignment mark (1) on the front of the actuator.
  3. Engage the actuator timing gear teeth with the secondary timing chain ensuring that the actuator alignment mark (7) corresponds with the paint mark created on the chain link.
  4. Slide the actuator over the camshaft alignment pin and install the actuator onto the camshaft.
  5. Install the left exhaust camshaft position actuator oil control valve (8). Refer to «Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__camshaft-position-cmp-actuator-oil-control) .

J 39946 Crankshaft Socket. See Special Tools .

Setting the camshaft timing is necessary whenever the camshaft drive system has been disturbed such that the alignment relationship between any chain and sprocket has been lost.

The crankshaft and camshafts are correctly timed when the crank sprocket and the intermediate shaft sprocket have their timing marks aligned and all 4 camshaft position actuator timing marks are perpendicular (90 degrees) to the cylinder head deck surface at the top of their rotation. The black timing chain links are used for assembly purposes. Do not reference these black links to determine if the engine timing components are properly aligned. The black links will only align with the actuator timing marks and the intermediate shaft sprocket, once every 126 revolutions. For this reason, it is not necessary to have the black secondary chain links aligned with the timing marks when servicing only one of the secondary timing components. Proper alignment is maintained by marking a chain link and sprocket gear tooth with a paint stick prior to disassembling individual components. When servicing individual components, refer to the appropriate procedure.

  1. Remove the following components for access to the timing chains: The left camshaft actuator housing - Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) . The right camshaft actuator housing - Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) . The engine front cover - Refer to «Engine Front Cover Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) . The engine oil pump - Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) . The right secondary camshaft drive chain - Refer to «Secondary Camshaft Drive Chain Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) . The left secondary camshaft drive chain - Refer to «Secondary Camshaft Drive Chain Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-replacement) .
  2. Use the J 39946 (1) in order to rotate the crankshaft. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  3. Using the J 39946 , rotate the crankshaft until: The primary timing gear alignment mark (1) is at the top of its position The crankshaft keyway (2) is approximately at the 1 o'clock position The intermediate sprocket timing mark (1) is at the bottom of its rotation, adjacent to the crank gear timing mark
  4. Timing the primary timing gears ensures that the #1 cylinder piston, bank 1 right front cylinder, is at top dead center (TDC) beginning its power stroke event. If this condition can not be accomplished while rotating the crankshaft (2), remove the primary gears and chain (3) and realign the primary timing marks. Refer to «Primary Camshaft Drive Chain Removal»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__primary-camshaft-drive-chain-removal) and «Primary Camshaft Drive Chain Installation»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  5. The left bank 2 secondary timing chain (2) has 3 black links that aid in timing the camshaft position actuators to the intermediate sprocket.
  6. The black link (4) is aligned with the bank 2 exhaust actuator timing mark. The black link (3) is aligned with the bank 2 intake actuator timing mark.
  7. The black link (1) is aligned with the intermediate sprocket.
  8. The intermediate sprocket left bank 2 timing mark is labeled left bank (LB) as shown.
  9. Assemble the secondary timing chain to the intermediate sprocket aligning the sprocket LB timing mark to the timing chain black link.
  10. Locate the timing mark (1) on the front of the intake actuator marked LI which stands for left intake.
  11. Align the timing mark (5) of the left bank intake camshaft position actuator with the timing chain black link (3) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation. Ensure that the camshaft alignment pin hole on the rear of the actuator engages with the camshaft alignment pin. If necessary, use an open-end wrench on the hex cast into the camshaft to obtain proper camshaft pin to actuator engagement.
  12. Loosely install the oil control valve (10) to secure the intake actuator.
  13. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  14. Locate the timing mark (1) on the front of the exhaust actuator marked LE which stands for left exhaust.
  15. Align the timing mark (7) of the left bank exhaust camshaft position actuator with the timing chain black link (4) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation. Ensure that the camshaft alignment pin hole on the rear of the actuator engages with the camshaft alignment pin. If necessary, use an open-end wrench on the hex cast into the camshaft to obtain proper camshaft pin to actuator engagement.
  16. Loosely install the oil control valve (8) to secure the exhaust actuator.
  17. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  18. Install the left secondary timing chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  19. The right bank 1 secondary timing chain has 3 black links that aid in timing the camshaft position actuators to the intermediate sprocket.
  20. The black link (2) is aligned with the bank 1 exhaust actuator timing mark. The black link (3) is aligned with the bank 1 intake actuator timing mark.
  21. The black link (1) is aligned with the intermediate sprocket.
  22. The intermediate sprocket right bank timing mark is labeled right bank (RB) as shown.
  23. Assemble the secondary timing chain to the intermediate sprocket aligning the sprocket RB timing mark to the timing chain black link.
  24. Locate the timing mark (1) on the intake actuator marked RI which stands for right intake.
  25. Align the timing mark (5) of the right bank intake camshaft position actuator with the timing chain black link (8) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface near the top of its rotation. Ensure that the camshaft alignment pin hole on the rear of the actuator engages with the camshaft alignment pin. If necessary, use an open-end wrench on the hex cast into the camshaft to obtain proper camshaft pin to actuator engagement.
  26. Loosely install the oil control valve (2) to secure the intake actuator.
  27. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  28. Locate the timing mark (1) on the actuator marked RE which stands for right exhaust.
  29. Align the timing mark (3) of the right bank exhaust camshaft position actuator with the timing chain black link and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface near the top of its rotation. Ensure that the camshaft alignment pin hole on the rear of the actuator engages with the camshaft alignment pin. If necessary, use an open-end wrench on the hex cast into the camshaft to obtain proper camshaft pin to actuator engagement.
  30. Loosely install the oil control valve (1) to secure the exhaust actuator.
  31. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve. Tighten: Tighten the oil control valve to 120 N.m (89 lb ft).
  32. Install the right secondary timing chain tensioner. Refer to «Secondary Camshaft Drive Chain Tensioner Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6__secondary-camshaft-drive-chain-tensioner-replacement) .
  33. Remove the EN 46328 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-1-of-6__special-tools) .
  34. Ensure the correct alignment of all secondary timing components.
  35. Ensure the correct alignment of the primary timing drive components (1).
  36. Install the engine oil pump. Refer to «Oil Pump Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  37. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  38. Install the right camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Right»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  39. Install the left camshaft actuator housing. Refer to «Camshaft Position (CMP) Actuator Housing Replacement - Left»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  1. Remove the left intake camshaft actuator (6). Refer to «Camshaft Position (CMP) Actuator Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  2. Remove the left exhaust camshaft actuator (9). Refer to «Camshaft Position (CMP) Actuator Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  3. Remove the left intake camshaft. Refer to «Camshaft Removal - Left Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__camshaft-removal-left-intake) .
  4. Remove the left exhaust camshaft. Refer to «Camshaft Removal - Left Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-3-of-6__camshaft-removal-left-exhaust) .
  5. Clean and inspect the camshafts. Refer to «Camshaft Cleaning and Inspection»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-4-of-6) .
  1. Install the left exhaust camshaft. Refer to «Camshaft Installation - Left Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  2. Install the left intake camshaft. Refer to «Camshaft Installation - Left Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-5-of-6) .
  3. Install the left exhaust camshaft actuator (9). Refer to «Camshaft Position (CMP) Actuator Replacement - Bank 2 (Left) Exhaust»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .
  4. Install the left intake camshaft actuator (6). Refer to «Camshaft Position (CMP) Actuator Replacement - Bank 2 (Left) Intake»(/cadillac/sts/i-2004-2007/remont/mechanical/#engine-mechanical-46l-lh2-2-of-6) .

See also:
• Air Cleaner Outlet Duct Replacement
• Engine Cooling Fan Bracket Replacement (LH2)
• Fastener Notice
• Special Tools
• Lifting and Jacking the Vehicle
• Exhaust Manifold Removal - Left
• Exhaust Manifold Removal - Right (RWD)
• Exhaust Manifold Removal - Right (AWD)
• Brace Replacement - Cross Vehicle
• Quick Connect Fitting(s) Service (Metal Collar)
• Intake Manifold Cleaning and Inspection
• Intake Manifold Disassemble
• Intake Manifold Assemble
• Oil Filter Adapter Cleaning and Inspection (Without Oil Cooler)
• Component Fastener Tightening Notice
• Starter Motor Replacement (LY7)
• Engine Oil and Oil Filter Replacement
• Remote Power Steering Fluid Reservoir Replacement (LH2)
• Camshaft Holding Tool Caution
• Torque Reaction Against Timing Drive Chain Notice
• Oil Outlet Tube Removal
• Oil Outlet Tube Installation
• Primary Camshaft Drive Chain Removal
• Camshaft Removal - Left Intake
• Camshaft Removal - Left Exhaust
• Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump
• Crankshaft Balancer Replacement
• Secondary Camshaft Drive Chain Replacement - Right
• Secondary Camshaft Drive Chain Tensioner Replacement - Left
• Secondary Camshaft Drive Chain Guide Replacement - Left
• Secondary Camshaft Drive Chain Shoe Replacement - Right
• Camshaft Position (CMP) Actuator Oil Control Valve Replacement - Bank 1 (Right) Intake

More articles — Engine