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Engine Mechanical - 2.0l (Ltg) or 2.5l (Lcv) - Repair Instructions - on Vehicle Cadillac ATS I

Mechanical 22 illustrations ~10480 words

Scheme 41

Scheme 41: Intake Manifold Cover Replacement
Scheme 41: Intake Manifold Cover Replacement
CalloutComponent Name
1Oil Cap
2Intake Manifold Cover Fastener CAUTION: Refer to Fastener Caution . Tighten 9 (80 lb in)
3Intake Manifold Cover
CAUTION
Refer to Fastener Caution .

Intake Manifold Cover Replacement

Scheme 42

Scheme 42: Drive Belt Replacement
Scheme 42: Drive Belt Replacement
CalloutComponent Name
Preliminary Procedure If equipped with engine RPO code LCV, remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (LCV) , Air Cleaner Outlet Duct Replacement (LTG) . If equipped, remove the secondary air injection pump. Refer to Secondary Air Injection Pump Replacement .
1Drive Belt Procedure Use the proper tool to rotate the drive belt tensioner. Remove the drive belt from the pulleys and tensioner.
2Drive Belt Tensioner Procedure Clean and inspect the drive belt surfaces of all the pulleys. Inspect the drive belt for correct alignment.

Drive Belt Replacement

Scheme 43

Scheme 43: Drive Belt Tensioner Replacement
Scheme 43: Drive Belt Tensioner Replacement
CalloutComponent Name
Preliminary Procedure Remove the drive belt. Refer to Drive Belt Replacement .
1Drive Belt Tensioner Fastener CAUTION: Refer to Fastener Caution . Tighten 58 (43 lb ft)
2Drive Belt Tensioner
CAUTION
Refer to Fastener Caution .

Drive Belt Tensioner Replacement

Engine Mount Inspection

  1. Install the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) . 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 split through the center of the engine mount. The GLYCOL™ fluid is leaking from the engine mount. The phenolic spacer under the top mounting stud of the engine mount is missing or damaged.
  3. Inspect the system for loose vacuum hose connections or vacuum leaks. Refer to «Vacuum Operated Engine Mounts Description and Operation»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-description-and-operation__vacuum-operated-engine-mounts-description-and) .
  4. Inspect the engine mount valve assemblies for loose electrical connections. Inspect the electrical system connected to the engine mount valve assemblies. Refer to «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .
  5. Inspect for the presence of glycol fluid in the vacuum system. Remove the hose assembly connections at the engine mounts. If fluid is present in the engine mount vacuum system, the entire vacuum system should be replaced.

Removal Procedure

  1. Remove the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  2. Remove the engine mount bracket bolt (1).
  3. Remove the engine mount bracket bolts (1).
  4. Remove the engine mount bracket (2).
  5. Engine mount bracket spacers (1).

Installation Procedure

  1. Install the engine mount bracket (2).
  2. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  3. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  4. Install the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  1. Remove the exhaust manifold. Refer to «Exhaust Manifold Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  2. Install the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the oil pump flow control valve heat shield bolt (1).
  5. Remove the oil pump flow control valve heat shield (2).
  6. Raise the vehicle.
  7. Remove the engine mount bracket bolt (1).
  8. Remove the engine mount bracket nut (1).
  9. Remove the engine mount bracket bolts (1).
  10. Remove the engine mount bracket (2).
  11. Engine Mount bracket spacers (1).
  1. Install the engine mount bracket (2).
  2. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  3. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  4. Install engine mount bracket nut (1) and tighten to 70 (52 lb ft).
  5. Install the oil pump flow control valve heat shield (2).
  6. Install the oil pump flow control valve heat shield bolt (1) and tighten to 9 (7 lb ft).
  7. Install the lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  8. Remove the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  9. Install the exhaust manifold. Refer to «Exhaust Manifold Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  1. Remove the turbocharger. Refer to «Turbocharger Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Install the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the oil pump flow control valve heat shield bolt (1).
  5. Remove the oil pump flow control valve heat shield (2).
  6. Raise the vehicle.
  7. Remove the engine mount bracket bolt (1).
  8. Remove the engine mount bracket nut (1).
  9. Remove the engine mount bracket bolts (1).
  10. Remove the engine mount bracket (2).
  11. If reusing the engine mount bracket, ensure that the engine mount bracket spacers (1) are in place in the engine mount bracket.
  1. Install the engine mount bracket (2).
  2. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  3. Install engine mount bracket bolts (1) and tighten to 58 (43 lb ft).
  4. Install engine mount bracket nut (1) and tighten to 70 (52 lb ft).
  5. Install the oil pump flow control valve heat shield (2).
  6. Install the oil pump flow control valve heat shield bolt (1) and tighten to 9 (7 lb ft).
  7. Install the lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  8. Remove the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  9. Install the turbocharger. Refer to «Turbocharger Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  1. Remove the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  2. Disconnect the engine mount vacuum hose.
  3. Remove the engine mount bolts (1).
  4. Remove the engine mount (2).
  1. Inspect the engine mount to ensure the phenolic spacer (1) is in place and not damaged.
  2. Install the engine mount (2).
  3. Install the engine mount bolts (1) and tighten to 62 (46 lb ft).
  4. Connect the engine mount vacuum hose.
  5. Install the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  1. Remove the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  2. Disconnect the engine mount vacuum hose (1).
  3. Remove the engine mount bolts (2).
  4. Remove the engine mount (3).
  1. Inspect the engine mount to ensure the phenolic spacer (1) is in place and not damaged.
  2. Install the engine mount (3)
  3. Install the engine mount bolts (2) and tighten to 62 (46 lb ft).
  4. Connect the engine mount vacuum hose (1)
  5. Install the drivetrain and front suspension frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .

Scheme 44

Scheme 44: Engine Mount Vacuum Valve Replacement
Scheme 44: Engine Mount Vacuum Valve Replacement
CalloutComponent Name
1Engine Mount Vacuum Valve Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . NOTE: Disconnect the vacuum lines from the components. Tighten 9 (80 lb in)
2Engine Mount Vacuum Valve (Qty: 2) Procedure Disconnect electrical connectors as necessary.
CAUTION
Refer to Fastener Caution .
NOTE
Disconnect the vacuum lines from the components.

Engine Mount Vacuum Valve Replacement

Scheme 45

Scheme 45: Engine Mount Vacuum Filter Replacement
Scheme 45: Engine Mount Vacuum Filter Replacement
CalloutComponent Name
1Engine Mount Vacuum Filter Procedure Disconnect the engine mount vacuum hose before removing the filter.

Engine Mount Vacuum Filter Replacement

Scheme 46

Scheme 46: Engine Mount Vacuum Tank Replacement
Scheme 46: Engine Mount Vacuum Tank Replacement
CalloutComponent Name
1Engine Mount Vacuum Tank Fastener CAUTION: Refer to Fastener Caution . NOTE: Disconnect the vacuum lines from the components. Tighten 9 (80 lb in)
2Engine Mount Vacuum Tank
CAUTION
Refer to Fastener Caution .
NOTE
Disconnect the vacuum lines from the components.

Engine Mount Vacuum Tank Replacement

Scheme 47

Scheme 47: Engine Mount Vacuum Hose Replacement
Scheme 47: Engine Mount Vacuum Hose Replacement
CalloutComponent Name
Preliminary Procedure Remove the drivetrain and front suspension frame. Refer to Drivetrain and Front Suspension Frame Removal and Installation .
1Engine Mount Vacuum Hose Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . NOTE: Disconnect the vacuum lines from the components. Tighten 9 (80 lb in)
2Engine Mount Vacuum Hose Procedure Remove the engine mount vacuum tank fastener. Refer to Engine Mount Vacuum Tank Replacement . Disconnect the engine mount vacuum hose retainer at the frame. Remove the engine mount vacuum hose assembly from the frame. Remove the vacuum tank and vacuum valves from the engine mount vacuum hose assembly. Remove the vacuum filter from the vacuum hose assembly.
CAUTION
Refer to Fastener Caution .
NOTE
Disconnect the vacuum lines from the components.

Engine Mount Vacuum Hose Replacement

Scheme 48

Scheme 48: Engine Support Fixture
Scheme 48: Engine Support Fixture
CalloutComponent Name
Preliminary Procedure Remove the front compartment front sight shield. Refer to Front Compartment Front Sight Shield Replacement . Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . Unclip and reposition the engine harness attached to the upper portion of the front cover. Special Tools J-28467-B Universal Engine Support Fixture J-28467-550 Engine Support Beam Adapter J-36857 Engine Lift Bracket For equivalent regional tools, refer to Special Tools .
1Engine Lift Bracket CAUTION: Refer to Fastener Caution . Procedure Install engine lift bracket using the engine front cover bolt. Tighten 58 (43 lb ft)
2Engine Support Fixture Adapter Leg (Qty: 2) Procedure Install the bracket to fender frame. Do not install on top of fender lip.
3Main Support Beam
4Cross Bracket (Qty, 2)
5Engine Support Fixture leg (Qty, 2) Procedure Adjust the length of the engine support fixture leg.
6Radiator Tube Shelf Assembly
7Hook Assembly NOTE: If the engine is not equipped with engine lift bracket, install J-36857 engine lift bracket in place.
CAUTION
Refer to Fastener Caution .
NOTE
If the engine is not equipped with engine lift bracket, install J-36857 engine lift bracket in place.

Engine Support Fixture

Scheme 49

Scheme 49: Turbocharger Heat Shield Replacement
Scheme 49: Turbocharger Heat Shield Replacement
CalloutComponent Name
1Turbocharger Heat Shield Fastener (Qty, 3) CAUTION: Refer to Fastener Caution . NOTE: In the event that a bolt breaks upon removal of components, perform an extraction of the broken bolt. Tighten 14 (10 lb ft)
2Turbocharger Heat Shield
CAUTION
Refer to Fastener Caution .
NOTE
In the event that a bolt breaks upon removal of components, perform an extraction of the broken bolt.

Turbocharger Heat Shield Replacement

  1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  3. Drain the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  4. Remove the turbocharger heat shield (1). Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. Remove the catalytic converter. Refer to «Catalytic Converter Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  6. Remove the charger air cooler inlet air tube. Refer to «Charge Air Cooler Inlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  7. Remove the turbocharger coolant return pipe bolts (1) and DISCARD gasket (2).
  8. Remove the PCV hose (1).
  9. Remove the turbocharger oil feed pipe bolts (1) and DISCARD gasket (2).
  10. Remove the turbocharger coolant return pipe bolts (1) and DISCARD gasket (2).
  11. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  12. Remove the turbocharger oil return pipe bolts (1).
  13. Lower the vehicle.
  14. Disconnect the electrical connectors at the turbocharger.
  15. Remove the turbocharger nuts (2) and discard.
  16. Remove the turbocharger (1).
  17. Remove the turbocharger gasket (3) and discard.
  18. For turbocharger cleaning and inspection. Refer to «Turbocharger Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  19. If replacing the turbocharger, transfer any necessary components.
  1. Install a NEW turbocharger gasket (3) on the turbocharger.
  2. Install NEW turbocharger oil feed and oil return pipe gaskets (4, 5).
  3. Install the turbocharger (1).
  4. Install NEW turbocharger nuts (2) finger tight.
  5. Install the turbocharger oil feed and return pipe bolts (6) at the engine block. tighten the bolts to 10 (89 lb in).
  6. Install the PCV hose. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  7. Tighten the turbocharger nuts in sequence: First pass 30 (22 lb ft). Final pass plus 90 degrees.
  8. Install the turbocharger oil return pipe bolts (1) and a NEW gasket and tighten the bolt to 10 (89 lb in).
  9. Install the turbocharger coolant return pipe bolts (1) and NEW gasket (2) and tighten the bolt to 10 (89 lb in).
  10. Install the turbocharger oil feed pipe bolts (1) and NEW gasket (2) and tighten the bolt to 10 (89 lb in).
  11. Install the PCV hose (1).
  12. Install the turbocharger coolant return pipe bolts (1) and NEW gasket (2) and tighten the bolt to 10 (89 lb in).
  13. Connect electrical connectors as necessary.
  14. Install the charger air cooler inlet air tube. Refer to «Charge Air Cooler Inlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  15. Install the catalytic converter. Refer to «Catalytic Converter Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Catalytic Converter Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  16. Install the turbocharger heat shield (1). Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  17. Fill the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  18. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  19. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Scheme 50

Scheme 50: Positive Crankcase Ventilation Valve Replacement (LTG)
Scheme 50: Positive Crankcase Ventilation Valve Replacement (LTG)
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . NOTE: Inspect each component while attached to the camshaft cover. Do not remove the PCV components unless inspection indicates a suspect component. Replace the PCV valve, PCV tube assembly, and PCV hose fitting as an assembly. The connections between these components are permanent.
1Positive Crankcase Ventilation Valve Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Positive Crankcase Ventilation Valve Procedure Inspect the PCV valve. If the PCV valve is suspect, use a suitable tool to pry the valve off of the cover. Retrieve any particles that fall onto the baffle in the cover. Discard the valve and particles. NOTE: When the PCV valve is removed, small particles of the valve will break and fall into the cover.
3Positive Crankcase Ventilation Valve
NOTE
Inspect each component while attached to the camshaft cover. Do not remove the PCV components unless inspection indicates a suspect component. Replace the PCV valve, PCV tube assembly, and PCV hose fitting as an assembly. The connections between these components are permanent.
CAUTION
Refer to Fastener Caution .
NOTE
When the PCV valve is removed, small particles of the valve will break and fall into the cover.

Positive Crankcase Ventilation Valve Replacement (LTG)

Scheme 51

Scheme 51: Positive Crankcase Ventilation Valve Replacement (Front)
Scheme 51: Positive Crankcase Ventilation Valve Replacement (Front)
CalloutComponent Name
Preliminary Procedures Remove the positive crankcase ventilation hose. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV) , Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG) .
1Positive Crankcase Ventilation Valve Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Positive Crankcase Ventilation Valve Procedure Inspect each component, O-rings, and fasteners, and replace as necessary.
CAUTION
Refer to Fastener Caution .

Positive Crankcase Ventilation Valve Replacement (Front)

Scheme 52

Scheme 52: Positive Crankcase Ventilation Valve Replacement (Rear)
Scheme 52: Positive Crankcase Ventilation Valve Replacement (Rear)
CalloutComponent Name
Preliminary Procedures Remove the positive crankcase ventilation hose. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV) , Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG) .
1Positive Crankcase Ventilation Valve Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Positive Crankcase Ventilation Valve Procedure Inspect each component, O-rings, and fasteners, and replace as necessary.
CAUTION
Refer to Fastener Caution .

Positive Crankcase Ventilation Valve Replacement (Rear)

Scheme 53

Scheme 53: Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)
Scheme 53: Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Positive Crankcase Ventilation Hose Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Positive Crankcase Ventilation Hose
CAUTION
Refer to Fastener Caution .

Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)

Scheme 54

Scheme 54: Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)
Scheme 54: Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Positive Crankcase Ventilation Hose Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Positive Crankcase Ventilation Hose
CAUTION
Refer to Fastener Caution .

Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)

  1. Remove the plenum front panel. Refer to «Plenum Front Panel Replacement»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#bolted-exterior-body-panels-and-closures) .
  2. Remove the PCV pipe. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the fuel pump insulator (1). Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  4. Remove the evaporative emission canister purge solenoid valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Evaporative Emission Canister Purge Solenoid Valve Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  5. Remove the radiator surge tank. Refer to «Radiator Surge Tank Replacement (LCV, LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  6. Remove the generator. Refer to «Generator Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) , «Generator Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  7. Remove the radiator inlet pipe fastener (1).
  8. Remove the lower intake manifold fastener (1).
  9. Disconnect the wire harness retainers from the intake manifold and reposition the harness aside.
  10. Disconnect the vacuum brake booster pipe at the intake manifold.
  11. Disconnect the evaporative emission pipe from the intake manifold retainer.
  12. If equipped with all-wheel drive, disconnect the front differential vent hose from the retainer at the intake manifold.
  13. Remove the upper intake manifold fasteners (1).
  14. Remove the intake manifold (2) from the vehicle.
  15. Disconnect electrical connector as necessary.
  16. Remove the intake manifold gasket (1) and DISCARD.
  17. For intake manifold cleaning and inspection. Refer to «Intake Manifold Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__intake-manifold-cleaning-and-inspection) .
  18. If replacing the intake manifold, transfer all necessary parts.
  1. Install the intake manifold gasket (1).
  2. Install the intake manifold (2).
  3. Install the intake manifold upper fasteners (1) and hand tighten.
  4. Install the lower intake manifold fastener (1) and hand tighten.
  5. Tighten the fastener in sequence twice to 12 (106 lb in).
  6. Install the radiator inlet pipe fastener (1) and tighten to 10 (89 lb in).
  7. Connect the wire harness retainers from the intake manifold and reposition the harness aside.
  8. Connect the vacuum brake booster pipe at the intake manifold.
  9. Connect the evaporative emission pipe from the intake manifold retainer.
  10. If equipped with all-wheel drive, connect the front differential vent hose from the retainer at the intake manifold.
  11. Install the generator. Refer to «Generator Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) , «Generator Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  12. Install the radiator surge tank. Refer to «Radiator Surge Tank Replacement (LCV, LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  13. Install the evaporative emission canister purge solenoid valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Evaporative Emission Canister Purge Solenoid Valve Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  14. Install the fuel pump insulator (1). Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  15. Install the PCV pipe. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  16. Install the plenum front panel. Refer to «Plenum Front Panel Replacement»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#bolted-exterior-body-panels-and-closures) .

Scheme 55

Scheme 55: Upper Intake Manifold Bracket Replacement
Scheme 55: Upper Intake Manifold Bracket Replacement
CalloutComponent Name
Preliminary Procedure Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Upper Intake Manifold Bracket Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Upper Intake Manifold Bracket
CAUTION
Refer to Fastener Caution .

Upper Intake Manifold Bracket Replacement

Scheme 56

Scheme 56: Crankshaft Balancer Replacement
Scheme 56: Crankshaft Balancer Replacement
CalloutComponent Name
Preliminary Procedures Remove the starter. Refer to Starter Replacement (LCV,LTG) . Install the EN-50792 Flywheel Holding Tool. Remove the drive belt. Refer to Drive Belt Replacement . Remove the engine fan shroud. Refer to Engine Coolant Fan Shroud Replacement (LCV, LFX without KC4) , Engine Coolant Fan Shroud Replacement (LTG without V03) , Engine Coolant Fan Shroud Replacement (LTG with VO3) . Special Tools EN-50792 Flywheel Holding Tool EN-45059 Angle Meter. EN-41816 Crankshaft Balancer Remover. J-38416-A Crankshaft End Protector For equivalent regional tools, refer to Special Tools .
1Crankshaft Bolt CAUTION: Refer to Fastener Caution . CAUTION: Refer to Torque-to-Yield Fastener Caution . Procedure Install the J-38416-A protector to the nose of the crankshaft prior to installing the EN-41816 to remove the balancer. Use the old bolt to seat the balancer. Install a NEW crankshaft bolt and washer. Tighten 150 (111 lb ft) plus 180 degrees.
2Crankshaft
CAUTION
Refer to Fastener Caution .

Crankshaft Balancer Replacement

Timing Chain Crankshaft Sprocket Replacement

Special Tools

EN-50837 Timing Chain Tensioner Retraction Tool

For equivalent regional tools, refer to Special Tools .

  1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the timing chain. Refer to «Camshaft Timing Chain and Tensioner Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the balancer chain tensioner bolt (1).
  4. Remove the balancer chain tensioner (2).
  5. Compress and lock the tensioner using EN-50837 retention tool. Insert EN-50837 retention tool into the lever arm and push in a counterclockwise direction. Compress the tensioner while holding lever arm. Relax the force on the lever and tensioner slightly, allowing the tensioner to extend 3 ratchet clicks, and then hold in place. Pull lever clockwise using EN-50837 retention tool until the hole in the lever aligns with the hole in the tensioner assembly. Push the point of EN-50837 retention tool through the lever and into the tensioner assembly.
  6. Remove the balancer chain guide bolt (1).
  7. Remove the balancer chain guide (2).
  8. Remove and discard the balancer shaft driven sprocket bolt (1).
  9. Remove the crankshaft sprocket, balancer shaft driven sprocket, and balancer chain (1) simultaneously.
  1. Assemble the crankshaft sprocket, balancer shaft driven sprocket, and balancer chain. Ensure the timing link (1) lines up with the timing mark (2) on the crankshaft sprocket. Ensure that both timing teeth (3) on the balancer shaft driven sprocket line up with the timing links (4).
  2. Install the sprockets and chain (1) as an assembly to the crankshaft and balancer shaft assembly.
  3. Ensure the timing link (1) is aligned with the crankshaft sprocket timing mark (2).
  4. Ensure the adjacent timing links (4) are aligned with both of the timing marks (3) on the balancer shaft driven sprocket.
  5. Install the NEW balancer shaft driven sprocket bolt (1).
  6. Tighten the balancer shaft driven sprocket bolt to 40 N.m (30 lb ft) plus 50 degrees.
  7. Install the balancer chain guide (2).
  8. Install the balancer chain guide bolts (1). Tighten the bolts to 10 N.m (89 lb in).
  9. Install the balancer chain tensioner (2).
  10. Install the balancer chain tensioner bolts (1). Tighten the bolts to 10 N.m (89 lb in).
  11. Remove EN-50837 retention tool to restore the tension to the balancer chain.
  12. Install the timing chain. Refer to «Camshaft Timing Chain and Tensioner Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  13. Install the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Scheme 57

Scheme 57: Crankshaft Front Oil Seal Replacement
Scheme 57: Crankshaft Front Oil Seal Replacement
CalloutComponent Name
Preliminary Procedure Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
1Front Crankshaft Seal Procedure Use a suitable tool to remove the front cover oil seal. Use the EN 50820 Front Crankshaft Seal Installer to install the seal. Special Tools EN 50820 Front Crankshaft Seal Installer For equivalent regional tools, refer to Special Tools .

Crankshaft Front Oil Seal Replacement

Special Tools

EN-50820 Front Crankshaft Seal Installer

KM-470-B Angular Torque Gauge

For equivalent regional tools, refer to Special Tools .

  1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the crankshaft balancer (1). Refer to «Crankshaft Balancer Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the drive belt tensioner (1). Refer to «Drive Belt Tensioner Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  4. Disconnect the wire harness retainers from the front cover.
  5. Remove the engine front cover bolts (2-6, 8).
  6. Remove the engine front cover (1).
  7. Remove the front oil seal (7) with an appropriate tool.
  8. Clean the engine block and cylinder head to front cover sealing surfaces.
  9. Clean the front cover sealing surface.
  1. Using EN-50820 installer , install the front crankshaft seal (1) into the engine front cover.
  2. Apply a 5 mm bead of sealer directly in the flange (1) of the engine front cover perimeter mating surface. Also apply a 5 mm bead of sealer directly to the locations indicated (2). Finally, apply a 14 mm dab of sealant at the locations indicated (3). Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  3. Install the engine front cover (1).
  4. Hand start the engine front cover bolts (2-6, 7).
  5. Tighten the engine front cover bolts in sequence to final torque twice: Tighten sequence 1-2 bolts to 58 (43 lb ft) Tighten sequence 3 bolt to 58 (43 lb ft). Tighten sequence 4-11 bolts to 25 (18 lb ft). Tighten sequence 12 bolt to 25 (18 lb ft). Tighten sequence 13-15 bolts to 25 (18 lb ft). Tighten sequence 16-17 bolts to 10 (89 lb in). Tighten sequence 18-19 bolts to 10 (89 lb in). Tighten sequence 20 bolt to 25 (18 lb ft)
  6. Connect the wire harness retainers to the front cover.
  7. Install the drive belt tensioner (1). Refer to «Drive Belt Tensioner Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  8. Install the crankshaft balancer (1). Refer to «Crankshaft Balancer Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  9. Install the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  1. Remove the camshaft position actuator and camshaft - exhaust. Refer to «Camshaft Position Actuator and Camshaft Replacement - Exhaust»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__camshaft-position-actuator-and-camshaft-replacement) .
  2. Remove the exhaust rocker arm (1).
  1. Lubricate the valve tips. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  2. Lubricate the roller bearings with valve rocker arm lubricant. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  3. Position the valve rocker arm (1) on the tip of the valve stem and on the lash adjuster and lubricate. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  4. Install the camshaft position actuator and camshaft - exhaust. Refer to «Camshaft Position Actuator and Camshaft Replacement - Exhaust»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__camshaft-position-actuator-and-camshaft-replacement) .
  1. Remove the camshaft position actuator and camshaft - intake. Refer to «Camshaft Position Actuator and Camshaft Replacement - Intake»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__camshaft-position-actuator-and-camshaft-replacement) .
  2. Remove the intake rocker arm (1).
  1. Lubricate the valve tips. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  2. Lubricate the roller bearings with valve rocker arm lubricant. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  3. Position the valve rocker arm (1) on the tip of the valve stem and on the lash adjuster and lubricate. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  4. Install the camshaft position actuator and camshaft - intake. Refer to «Camshaft Position Actuator and Camshaft Replacement - Intake»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__camshaft-position-actuator-and-camshaft-replacement) .
  1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the upper timing chain guide bolts (2, 3).
  3. Remove the upper timing chain guide (1).
  4. Remove the timing chain tensioner bolts (1) and timing chain tensioner (2).
  5. Remove the timing chain tensioner pivot arm bolt (1).
  6. Remove the timing chain tensioner pivot arm (2).
  7. Remove the timing chain guide bolts (1).
  8. Remove the timing chain guide (2).
  9. Remove the timing chain (1).
  10. Remove the timing chain oil nozzle (1).
  11. For camshaft timing chain, sprocket, and tensioner cleaning and inspection. Refer to «Camshaft Timing Chain, Sprocket, and Tensioner Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__camshaft-timing-chain-sprocket-and-tensioner) .
  1. Install the timing chain oil nozzle (1).
  2. Loop the timing chain over the intake and exhaust camshaft actuators, aligning the unique colored link (2) with the timing mark on the exhaust camshaft actuator (3).
  3. Ensure the crankshaft key in the 12 O'clock position. Loop the timing chain onto the crankshaft sprocket.
  4. Install the timing chain guide (2) and upper bolt (1) only, finger tight.
  5. Install the timing chain tensioner pivot arm (3).
  6. Install the pivot arm bolt (1) finger tight.
  7. With a suitable tool, rotate the crankshaft counterclockwise to align the timing mark on the crankshaft sprocket (1) with the timing link (2).
  8. Rotate the lower end of the fixed timing chain guide into installation position and install the lower bolt (3).
  9. Tighten the timing chain guide upper and lower bolts to 25 N.m (18 lb ft).
  10. Using a suitable tool, rotate the intake camshaft counterclockwise until the timing mark on the intake actuator (2) is aligned with the timing link (1). Maintain tension on intake camshaft until the timing chain tensioner can be installed and activated.
  11. Install the timing chain tensioner (2) and tighten timing chain tensioner bolts (1) to 25 (18 lb ft)
  12. Verify the timing links on the timing chain are properly aligned to the timing marks: The timing links (1, 2) are aligned to the appropriate timing marks on the camshaft actuators (6, 3). The unique colored link (5) is aligned to the timing mark on the crankshaft sprocket (4).
  13. If they are not, repeat the portion of the procedure necessary to align the timing marks.
  14. Install the timing chain guide (1) and bolts (2, 3) finger tight.
  15. Tighten the front camshaft cap bolts in sequence to 10 N.m (89 lb in) twice.
  16. Rotate the crankshaft clockwise to see if either of the actuators or the crankshaft sprocket jump timing chain teeth. If this occurs, repeat procedure to align the timing marks.
  17. Verify the timing links on the balance chain are properly aligned to the timing marks: The timing link (1) is aligned to the timing mark on the crankshaft sprocket (2). The adjacent timing links (4) are aligned with both timing marks (3) on the balancer shaft driven sprocket.
  18. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  1. Remove the fuel pump insulator- outer. Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  2. Remove the positive crankcase ventilation hose/pipe/tube (1). Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the oil level indicator (3). Inspect and replace the oil indicator O-ring seals (4), if necessary.
  4. If equipped with engine RPO LTG, remove the turbocharger heat shield bolts and heat shield. Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. Disconnect the wire harness retainers at the camshaft cover heat shield.
  6. Remove the camshaft cover heat shield (2) and bolts (1).
  7. Remove the vacuum pump. Refer to «Vacuum Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  8. Remove the engine coolant air bleed pipe.
  9. Remove the ignition coils (1). Refer to «Ignition Coil Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  10. Remove the camshaft position actuator intake solenoid valve. Refer to «Camshaft Position Actuator Intake Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  11. Remove the camshaft position actuator exhaust solenoid valve. Refer to «Camshaft Position Actuator Exhaust Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  12. Remove the fuel line bracket retainer stud and reposition bracket.
  13. If equipped with engine RPO LTG, remove the turbocharger PCV tube fastener at the turbocharger and reposition the PCV tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  14. Remove the camshaft cover short fasteners (1).
  15. Remove the camshaft cover longer fastener (2).
  16. Remove the camshaft cover (1) and gasket (2).
  17. For cleaning and inspection. Refer to «Camshaft Cover Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  1. Assemble the camshaft cover (2) and a NEW gasket (4). Ensure that the gasket is located in the retaining groove in the camshaft cover.
  2. Install the cover on the cylinder head and hand start the bolts (1, 3).
  3. Tighten the camshaft cover bolts in sequence to 10 (89 lb in).
  4. Install the camshaft position actuator intake solenoid valve. Refer to «Camshaft Position Actuator Intake Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  5. Install the camshaft position actuator exhaust solenoid valve. Refer to «Camshaft Position Actuator Exhaust Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  6. Install the vacuum pump. Refer to «Vacuum Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  7. Reinstall the fuel line bracket retainer stud and reposition bracket.
  8. If equipped with engine RPO LTG, install the turbocharger PCV tube fastener at the turbocharger and reposition the PCV tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  9. Install the ignition coils (1). Refer to «Ignition Coil Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  10. Install the camshaft cover heat shield (2) and bolts (1) and tighten the bolts to 10 (89 lb in).
  11. Install the oil level indicator (3). Inspect and replace the oil indicator O-ring seals (4), if necessary.
  12. If equipped with engine RPO LTG, install the turbocharger heat shield bolts and heat shield. Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  13. Connect the wire harness retainers at the camshaft cover heat shield.
  14. Inspect the O-ring on the engine coolant air bleed pip. Replace if necessary. Install the engine coolant air bleed pipe (1).
  15. Install the pipe fastener and tighten to 10 (89 lb in).
  16. If equipped with engine RPO LTG, install the turbocharger coolant return pipe. Refer to «Turbocharger Coolant Return Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system)
  17. Install the positive crankcase ventilation hose/pipe/tube (1). Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  18. Install the fuel pump insulator- outer. Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  1. Remove the fuel pump insulator- outer. Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  2. Remove the positive crankcase ventilation hose/pipe/tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the PCV hose fitting bolt (2).
  4. Disconnect the PCV hose fitting (1) with the PCV hose attached from the turbocharger.
  5. Remove the oil level indicator (3). Inspect and replace the oil indicator O-ring seals (4), if necessary.
  6. If equipped with engine RPO LTG, remove the turbocharger heat shield bolts and heat shield. Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  7. Disconnect the wire harness retainers at the camshaft cover heat shield.
  8. Remove the camshaft cover heat shield (2) and bolts (1).
  9. Remove the vacuum pump. Refer to «Vacuum Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  10. Remove the engine coolant air bleed pipe. Refer to «Engine Coolant Air Bleed Pipe Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  11. If equipped with engine RPO LTG, remove the turbocharger coolant return pipe. Refer to «Turbocharger Coolant Return Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  12. Remove the ignition coils (1). Refer to «Ignition Coil Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  13. Remove the camshaft position actuator intake solenoid valve. Refer to «Camshaft Position Actuator Intake Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  14. Remove the camshaft position actuator exhaust solenoid valve. Refer to «Camshaft Position Actuator Exhaust Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  15. Remove the fuel line bracket retainer stud and reposition bracket.
  16. If equipped with engine RPO LTG, remove the turbocharger PCV tube fastener at the turbocharger and reposition the PCV tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  17. Remove the camshaft cover long fasteners (1) and short fasteners (2).
  18. Remove the camshaft cover (1) and gasket (2).
  19. For cleaning and inspection. Refer to «Camshaft Cover Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  1. Assemble the camshaft cover (2) and a NEW gasket (4). Ensure that the gasket is located in the retaining groove in the camshaft cover.
  2. Install the cover on the cylinder head and hand start the bolts (1, 3).
  3. Tighten the camshaft cover bolts in sequence to 10 (89 lb in).
  4. Install the camshaft position actuator intake solenoid valve. Refer to «Camshaft Position Actuator Intake Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  5. Install the camshaft position actuator exhaust solenoid valve. Refer to «Camshaft Position Actuator Exhaust Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  6. Install the vacuum pump. Refer to «Vacuum Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  7. Install the engine coolant air bleed pipe. Refer to «Engine Coolant Air Bleed Pipe Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  8. Reinstall the fuel line bracket retainer stud and reposition bracket.
  9. If equipped with engine RPO LTG, install the turbocharger PCV tube fastener at the turbocharger and reposition the PCV tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  10. Install the ignition coils (1). Refer to «Ignition Coil Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  11. Install the camshaft cover heat shield (2) and bolts (1) and tighten the bolts to 10 (89 lb in).
  12. Install the oil level indicator (3). Inspect and replace the oil indicator O-ring seals (4), if necessary.
  13. If equipped with engine RPO LTG, install the turbocharger heat shield bolts and heat shield. Refer to «Turbocharger Heat Shield Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  14. Connect the wire harness retainers at the camshaft cover heat shield.
  15. Inspect the O-ring on the engine coolant air bleed pip. Replace if necessary. Install the engine coolant air bleed pipe (1).
  16. Install the pipe fastener and tighten to 10 (89 lb in).
  17. If equipped with engine RPO LTG, install the turbocharger coolant return pipe. Refer to «Turbocharger Coolant Return Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  18. Install the PCV hose and fitting assembly (1) to the turbocharger. Install the PCV hose fitting assembly bolt (2) and tighten to 8 (71 lb in).
  19. Install the positive crankcase ventilation hose/pipe/tube. Refer to «Positive Crankcase Ventilation Hose/Pipe/Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  20. Install the fuel pump insulator- outer. Refer to «Fuel Pump Insulator Replacement (Inner)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Pump Insulator Replacement (Outer)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .

Scheme 58

Scheme 58: Timing Chain Tensioner Replacement
Scheme 58: Timing Chain Tensioner Replacement
CalloutComponent Name
Preliminary Procedure Remove the camshaft timing chain. Refer to Camshaft Timing Chain and Tensioner Replacement .
1Timing Chain Tensioner Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 25 (18 lb ft)
2Timing Chain Tensioner
CAUTION
Refer to Fastener Caution .

Timing Chain Tensioner Replacement

  1. Remove the exhaust valve rocker arm. Refer to «Valve Rocker Arm Replacement (Exhaust)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the hydraulic lash adjusters (1).
  1. Lubricate and install the hydraulic valve lash adjusters (1) into their bores in the cylinder head. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  2. Install the exhaust valve rocker arm. Refer to «Valve Rocker Arm Replacement (Exhaust)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  1. Remove the Intake valve rocker arm. Refer to «Valve Rocker Arm Replacement (Intake)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the hydraulic lash adjusters (1).
  1. Lubricate and install the hydraulic valve lash adjusters (1) into their bores in the cylinder head. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  2. Install the Intake valve rocker arm. Refer to «Valve Rocker Arm Replacement (Intake)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Camshaft Position Actuator and Camshaft Replacement - Intake

Special Tools

  1. EN-50656 Holding Tool
  2. EN 50793 Locking Tool

For equivalent regional tools, refer to Special Tools .

  1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the high pressure fuel pump. Refer to «Fuel Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  3. Install EN-50656 timing chain holding tool (1) and tighten to 8 (71 lb in).
  4. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the exhaust camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  5. Remove and DISCARD the camshaft actuator bolt (1).
  6. Remove the EN-50793 holding tool (2).
  7. Remove the upper timing chain guide bolts (1, 2).
  8. Remove the upper timing chain guide (3).
  9. Remove the camshaft front bearing cap bolts (4).
  10. Remove the camshaft front bearing cap (5).
  11. Mark the exhaust camshaft rear cap to ensure it is installed in the same position. Remove the exhaust camshaft bearing rear cap bolts (1) and cap (2).
  12. Mark the camshaft caps (4) to ensure they are installed in the same position.
  13. Remove the exhaust camshaft cap bolts (3).
  14. Remove the camshaft caps (4).
  15. Pull exhaust camshaft actuator assembly forward away from camshaft assembly (1), then lift rear of exhaust camshaft assembly to a tilt and pull free from exhaust camshaft actuator assembly (2).
  16. Mark the intake camshaft rear cap to ensure it is installed in the same position. Remove the intake camshaft bearing rear cap bolts (1) and cap (2).
  17. Mark the camshaft caps (4) to ensure they are installed in the same position.
  18. Remove the intake camshaft cap bolts (3).
  19. Remove the camshaft caps (4).
  20. Lift and roll intake camshaft assembly from original position over into exhaust camshaft position within engine head assembly.
  21. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the intake camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  22. Remove the camshaft actuator bolt (1).
  23. Remove the EN-50793 holding tool (2).
  24. Pull intake camshaft actuator assembly forward away from camshaft assembly (1), then lift rear of intake camshaft assembly to a tilt and pull free from intake camshaft actuator assembly (2).
  25. Replace the camshaft if necessary.
  1. Install the intake camshaft (1) and camshaft actuator (2).
  2. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the intake camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  3. Install a NEW camshaft actuator bolt (1) and tighten to 30 (22 lb ft) plus 100 degrees.
  4. Lift and roll intake camshaft assembly from exhaust camshaft position over into original position.
  5. Set the intake camshaft on top of the roller followers in the camshaft bearing journals with the intake actuator timing mark at approximately the 11 O'clock position.
  6. Install the camshaft cap bolts (1, 3) into the camshaft caps (2, 4).
  7. Install the camshaft caps (2, 4) and hand start the camshaft cap bolts (1, 3).
  8. Install the exhaust camshaft (1) and camshaft actuator (2).
  9. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the intake camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  10. Install a NEW camshaft actuator bolt (1) and tighten to 30 (22 lb ft) plus 100 degrees.
  11. Set the exhaust camshaft on top of the roller followers in the camshaft bearing journals with the exhaust actuator timing mark at approximately the one O'clock position.
  12. Install the camshaft cap bolts (1, 3) into the camshaft caps (2, 4).
  13. Install the camshaft caps (2, 4) and hand start the camshaft cap bolts (1, 3).
  14. Install the front camshaft bearing cap (1). Install the timing chain guide (2) onto the front camshaft bearing cap, then hand start the camshaft cap bolts (3-5).
  15. Tighten the camshaft cap bolts in sequence using the following procedure: Tighten the camshaft cap bolts in sequence to 8 (71 lb in). Loosen both bolts in each cap in sequence to 180 degrees. Tighten the camshaft cap bolts in sequence to 10 (89 lb in) twice.
  16. Tighten the front camshaft cap bolts in sequence to 10 (89 lb in) twice.
  17. Remove EN-50656 timing chain holding tool (1).
  18. Install the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  19. Install the high pressure fuel pump. Refer to «Fuel Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .

Camshaft Position Actuator and Camshaft Replacement - Exhaust

Special Tools

  1. EN-50656 Holding Tool
  2. EN 50793 Locking Tool

For equivalent regional tools, refer to Special Tools .

  1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Install EN-50656 timing chain holding tool (1) and tighten to 8 (71 lb in).
  3. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the exhaust camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  4. Remove and DISCARD the camshaft actuator bolt (1).
  5. Remove the EN-50793 holding tool (2).
  6. Remove the upper timing chain guide bolts (1, 2).
  7. Remove the upper timing chain guide (3).
  8. Remove the camshaft front bearing cap bolts (4).
  9. Remove the camshaft front bearing cap (5).
  10. Mark the exhaust camshaft rear cap to ensure it is installed in the same position. Remove the exhaust camshaft bearing rear cap bolts (1) and cap (2).
  11. Mark the camshaft caps (4) to ensure they are installed in the same position.
  12. Remove the exhaust camshaft cap bolts (3).
  13. Remove the camshaft caps (4).
  14. Pull exhaust camshaft actuator assembly forward away from camshaft assembly (1), then lift rear of exhaust camshaft assembly to a tilt and pull free from exhaust camshaft actuator assembly (2).
  15. Replace the camshaft if necessary.
  1. Install the exhaust camshaft (1) and camshaft actuator (2).
  2. Align and install camshaft actuator locking tool (2) EN 50793 into the slots of the intake camshaft actuator and mount tool to engine front cover assembly and tighten the bolts (1) to 10 (89 lb in).
  3. Install a NEW camshaft actuator bolt (1) and tighten to 30 (22 lb ft) plus 100 degrees.
  4. Set the exhaust camshaft on top of the roller followers in the camshaft bearing journals with the exhaust actuator timing mark at approximately the one O'clock position.
  5. Install the camshaft cap bolts (1, 3) into the camshaft caps (2, 4).
  6. Install the camshaft caps (2, 4) and hand start the camshaft cap bolts (1, 3).
  7. Install the front camshaft bearing cap (1). Install the timing chain guide (2) onto the front camshaft bearing cap, then hand start the camshaft cap bolts (3-5).
  8. Install the camshaft cap bolts in sequence using the following procedure: Tighten the camshaft cap bolts in sequence to 8 (71 lb in). Loosen both bolts in each cap in sequence to 180 degrees. Tighten the camshaft cap bolts in sequence to 10 (89 lb in) twice.
  9. Tighten the front camshaft cap bolts in sequence to 10 (89 lb in) twice.
  10. Remove EN-50656 timing chain holding tool (1).
  11. Install the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Scheme 59

Scheme 59: Camshaft Cover Heat Shield Replacement
Scheme 59: Camshaft Cover Heat Shield Replacement
CalloutComponent Name
Preliminary Procedure Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . If equipped with LTG, remove the engine coolant air bleed pipe. Refer to Engine Coolant Air Bleed Pipe Replacement (LTG) . If equipped with LTG, remove the turbocharger coolant return pipe. Refer to Turbocharger Coolant Return Pipe Replacement .
1Camshaft Heat Shield Cover Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Camshaft Heat Shield Cover
CAUTION
Refer to Fastener Caution .

Camshaft Cover Heat Shield Replacement

Special Tools

  1. EN 38188 Cylinder Head Broken Bolt Extractor Kit
  2. EN 45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

  1. Drain the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  2. Drain the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Remove the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  4. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. Remove the exhaust manifold. Refer to «Exhaust Manifold Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Exhaust Manifold Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  6. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  7. Remove the camshaft timing chain and tensioner. Refer to «Camshaft Timing Chain and Tensioner Removal»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__camshaft-timing-chain-and-tensioner-removal) .
  8. Remove the fuel pump. Refer to «Fuel Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  9. Remove the intake and exhaust camshafts. Refer to «Intake and Exhaust Camshaft, Bearing Cap, and Lash Adjuster Removal»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  10. Remove the ground wire bolt and wire at the left front of the cylinder head and reposition the harness retainer
  11. Remove the 2 bolt and ground wires at the left rear of the cylinder head.
  12. Disconnect the right camshaft position sensor electrical.
  13. Disconnect the left camshaft position sensor electrical.
  14. Disconnect the thermostat bypass hose from the water outlet housing.
  15. Disconnect the heater hose from the water outlet housing.
  16. Remove the water outlet housing bolts and housing.
  17. Remove the water outlet housing seal.
  18. Remove the injector fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) .
  19. Remove the cylinder head to the block bolts in sequence. Discard the bolts.
  20. Remove the cylinder head (2) and bolts (1).
  21. Remove the cylinder head gasket (3).
  22. Clean all of the gasket surfaces.
  23. Use the following procedures when cleaning the cylinder head and cylinder block surfaces: Use a gasket scraper to clean the cylinder head and cylinder block gasket surfaces. Do not scratch or gouge any surface. NOTE: Do not use any other method or technique to clean these gasket surfaces. NOTE: Be careful not to gouge or scratch the gasket surfaces. Do not gouge or scrape the combustion chamber surfaces. The feel of the gasket surface is important, not the appearance. There will be indentations from the gasket left in the cylinder head after all of the gasket material is removed. These small indentations will be filled in by the new gasket.
  24. Clean the old sealer/lube and dirt from the bolt holes.
  25. Clean the bolt holes with a nylon bristle brush.
  26. When cleaning the cylinder head bolt holes use a suitable commercial spray liquid solvent and compressed air from an extended-tip blow gun to reach the bottom of the holes.
  27. Remove any broken long cylinder head bolts using the EN 38188 kit.
  28. For cylinder head disassemble. Refer to «Cylinder Head Disassemble»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__cylinder-head-disassemble) .
  29. For cylinder head cleaning and inspection. Refer to «Cylinder Head Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__cylinder-head-cleaning-and-inspection)
  1. For cylinder head assemble. Refer to «Cylinder Head Assemble»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__cylinder-head-assemble) .
  2. Remove EN-50792 flywheel holding tool.
  3. Ensure the number one cylinder is at top dead center. The crankshaft key should be on top at the 12 o'clock position.
  4. Install the cylinder head gasket (3) to the block.
  5. Install the cylinder head (2).
  6. Install the cylinder head bolts. Tighten the bolts in sequence to 30 N.m (22 lb ft). Tighten the bolts an additional 190 degrees in sequence using the EN-45059 meter.
  7. Connect the heater hose to the water outlet.
  8. Connect the thermostat bypass hose to the water outlet.
  9. Connect the left side camshaft electrical connector.
  10. Connect the right side camshaft electrical connector.
  11. Install the 2 ground wire and bolt at the left rear of the cylinder head.
  12. Install the ground wire and bolt at the left front of the cylinder head.
  13. Install the water outlet housing bolts and housing.
  14. Install the water outlet housing seal.
  15. Install the injector fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) .
  16. Install the intake and exhaust camshafts. Refer to «Intake and Exhaust Camshaft, Bearing Cap, and Lash Adjuster Installation»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  17. Install the fuel pump. Refer to «Fuel Pump Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  18. Install the camshaft timing chain and tensioner. Refer to «Camshaft Timing Chain and Tensioner Installation»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__camshaft-timing-chain-and-tensioner-installation) .
  19. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  20. Install the exhaust manifold. Refer to «Exhaust Manifold Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Exhaust Manifold Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
  21. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  22. Install the camshaft cover. Refer to «Camshaft Cover Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Camshaft Cover Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  23. Refill the engine with NEW oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  24. Refill the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  1. Remove the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the engine oil cooler fastener (1).
  3. Remove the engine oil cooler hose (1) and (2).
  4. Remove the engine oil cooler connector (3).
  5. Remove the engine oil cooler (1).
  1. Install the engine oil cooler (1).
  2. Install the engine oil cooler connector (3) and tighten to 50 (37 lb ft).
  3. Install the oil cooler hose (1) and (2).
  4. Install the oil cooler fastener (1) and tighten to 10 (89 lb in)
  5. Install the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Scheme 60

Scheme 60: Oil Pan Replacement (LCV Lower)
Scheme 60: Oil Pan Replacement (LCV Lower)
CalloutComponent Name
Preliminary Procedures Drain engine oil. Refer to Engine Oil and Oil Filter Replacement
1Oil Pan Bolts (Qty 2) CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Oil Pan Bolts (Qty; 13) Tighten 10 (89 lb in)
3Oil Pan Procedure Apply a 2.25 mm bead of sealer on the level part of the flange around the perimeter of the oil pan. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) . NOTE: The lower crankcase surface must be free of contamination prior to applying the sealer. Install and align the oil pan to block within 20 minutes of applying the sealer. The oil pan must be fastened to final torque specification within 60 minutes of applying the sealer.
CAUTION
Refer to Fastener Caution .
NOTE
The lower crankcase surface must be free of contamination prior to applying the sealer. Install and align the oil pan to block within 20 minutes of applying the sealer. The oil pan must be fastened to final torque specification within 60 minutes of applying the sealer.

Oil Pan Replacement (LCV Lower)

  1. Drain the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  3. Unbolt and reposition the A/C compressor without disconnecting the lines. Refer to «Air Conditioning Compressor Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Air Conditioning Compressor Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. If equipped, remove the engine oil cooler. Refer to «Engine Oil Cooler Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. If equipped with all-wheel drive, remove the front differential carrier assembly. Refer to «Front Differential Carrier Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/differentials-drive-axles/#front-drive-axle__front-differential-carrier-assembly-replacement) .
  6. If equipped with all-wheel drive, remove the front wheel drive intermediate shaft housing. Refer to «Front Wheel Drive Intermediate Shaft Housing Replacement»(/cadillac/ats/i-2012-2014/remont/differentials-drive-axles/#front-drive-axle__front-wheel-drive-intermediate-shaft-housing) .
  7. If equipped with rear-wheel drive, remove the frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  8. Remove the oil pump exhaust shield bolt (1).
  9. Remove the exhaust bracket bolts (1) and bracket (2).
  10. Remove the transmission cooler pipe retainer bolt and reposition the pipe assembly. Refer to «Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LCV, LFX, LTG with VO3)»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) , «Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LCV, LFX, LTG without VO3)»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  11. Remove the transmission bolts (1).
  12. Remove the oil pan bolts (1-3).
  13. Remove the oil pan (4).
  14. Disconnect the electrical connector as necessary.
  15. Remove the lower oil pan (2), if necessary. Refer to «Oil Pan Removal (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__oil-pan-removal-lcv) , «Oil Pan Removal (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__oil-pan-removal-ltg) .
  16. For oil pan cleaning and inspection, refer to «Oil Pan Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle) .
  1. Apply a 4.25 mm bead of sealer (1) on the level part of the flange around the perimeter of the oil pan. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  2. Install the oil pan (4).
  3. Install the oil pan bolts (1-3) and finger tighten.
  4. Tighten the oil pan bolts in sequence to final torque twice using the following procedure: Tighten bolts in sequence 1-11 to 25 (18 lb ft). Tighten bolts in sequence 12-13 to 10 (89 lb in).
  5. Install the transmission bolts (1) and tighten to 50 (37 lb ft).
  6. Install the exhaust bracket (2).
  7. Install the exhaust bolts (1) and tighten to 10 (89 lb in).
  8. Install the transmission cooler pipe retainer bolt . Refer to «Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LCV, LFX, LTG with VO3)»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) , «Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LCV, LFX, LTG without VO3)»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  9. Install the oil pump exhaust shield bolt (1) and tighten to 10 (89 lb in).
  10. Connect the electrical connector as necessary.
  11. If equipped with rear-wheel drive, install the frame. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  12. If equipped with all-wheel drive, install the front wheel drive intermediate shaft housing. Refer to «Front Wheel Drive Intermediate Shaft Housing Replacement»(/cadillac/ats/i-2012-2014/remont/differentials-drive-axles/#front-drive-axle__front-wheel-drive-intermediate-shaft-housing) .
  13. If equipped with all-wheel drive, install the front differential carrier assembly. Refer to «Front Differential Carrier Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/differentials-drive-axles/#front-drive-axle__front-differential-carrier-assembly-replacement) .
  14. If equipped, install the engine oil cooler. Refer to «Engine Oil Cooler Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  15. Reinstall the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Air Conditioning Compressor Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  16. Refill the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Scheme 61

Scheme 61: Oil Pan Replacement (LTG Lower)
Scheme 61: Oil Pan Replacement (LTG Lower)
CalloutComponent Name
Preliminary Procedures Drain engine oil. Refer to Engine Oil and Oil Filter Replacement
1Oil Pan Bolts (Qty 8) CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Oil Pan Procedure Apply a 2.25 mm bead of sealer on the level part of the flange around the perimeter of the oil pan. Refer to Adhesives, Fluids, Lubricants, and Sealers (LTG) . NOTE: The lower crankcase surface must be free of contamination prior to applying the sealer. Install and align the oil pan to block within 20 minutes of applying the sealer. The oil pan must be fastened to final torque specification within 60 minutes of applying the sealer.
CAUTION
Refer to Fastener Caution .
NOTE
The lower crankcase surface must be free of contamination prior to applying the sealer. Install and align the oil pan to block within 20 minutes of applying the sealer. The oil pan must be fastened to final torque specification within 60 minutes of applying the sealer.

Oil Pan Replacement (LTG Lower)

  1. Remove the oil pan. Refer to «Oil Pan Replacement (LCV Lower)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Oil Pan Replacement (Upper)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Oil Pan Replacement (LTG Lower)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. Disconnect the oil level sensor electrical connector.
  3. Remove the engine oil level sensor C-clip (1).
  4. Remove the engine oil level sensor fasteners (1).
  5. Remove the engine oil level sensor (1) from the oil pan.
  1. Install the engine oil level sensor (1).
  2. Install the engine oil level sensor fastener (1) and tight to 10 (89 lb in).
  3. Install the engine oil level sensor C-clip (1).
  4. Connect the oil level sensor electrical connector.
  5. Remove the oil pan. Refer to «Oil Pan Replacement (LCV Lower)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Oil Pan Replacement (Upper)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) , «Oil Pan Replacement (LTG Lower)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .

Engine Flywheel Replacement

Special Tools

  1. EN 50792 Flywheel Holding Tool
  2. EN-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

  1. Remove the clutch assembly. Refer to «Clutch Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/clutches-manual-hydraulic/#manual-transmission-clutch__clutch-assembly-replacement) .
  2. To prevent crankshaft rotation, install EN-50792 holding tool (2) and starter motor bolts (1) at the starter motor location and engaging the flywheel.
  3. Remove and discard the flywheel attaching bolts (1).
  4. Remove the flywheel (2).
  5. Remove EN 50792 holding tool.
  6. For engine flywheel cleaning and inspection. Refer to «Engine Flywheel Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__engine-flywheel-cleaning-and-inspection) .
  1. Install the flywheel (2) and hand start NEW bolts (1).
  2. To prevent crankshaft rotation, install EN-50792 holding tool (2) and starter motor bolts (1) at the starter motor location and engaging the flywheel.
  3. Tighten the bolts evenly using the following procedure: Tighten the bolts a first pass in sequence to 20 (15 lb ft). Tighten the bolts a second pass in sequence to 30 (22 lb ft). Tighten the bolts a final pass in sequence 40 degrees using the EN-45059 angle meter.
  4. Remove EN-50792 holding tool.
  5. Install the clutch assembly. Refer to «Clutch Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/clutches-manual-hydraulic/#manual-transmission-clutch__clutch-assembly-replacement) .

Special Tools

  1. EN 50792 Flywheel Holding Tool
  2. EN-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

  1. Remove the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  2. To prevent crankshaft rotation, install EN 50792 holding tool (2) and starter motor bolts (1) at the starter motor location and engaging the automatic flex plate.
  3. Remove the automatic flex plate attaching bolts (1).
  4. Remove the automatic flex plate (2).
  5. Remove EN 50792 holding tool.
  6. For automatic flex plate cleaning and inspection. Refer to «Automatic Transmission Flex Plate Cleaning and Inspection»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__automatic-transmission-flex-plate-cleaning-and) .
  1. Install the automatic flex plate (2) and hand start NEW bolts (1).
  2. To prevent crankshaft rotation, install EN-50792 automatic flex plate holding tool (2) and starter motor bolts (1) at the starter motor location and engaging the flex plate.
  3. Tighten the bolts evenly using the following procedure: Tighten the bolts a first pass in sequence to 20 N.m (15 lb ft). Tighten the bolts a second pass in sequence to 30 N.m (22 lb ft). Tighten the bolts a final pass in sequence 40 degrees using the EN-45059 angle meter.
  4. Remove EN-50792 automatic flex plate holding tool.
  5. Install the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .

Crankshaft Rear Oil Seal Replacement

Special Tools

EN-42067 Rear Main Seal Installer

For equivalent regional tools, refer to Special Tools .

  1. If equipped with an automatic transmission, remove the automatic transmission flex plate. Refer to «Automatic Transmission Flex Plate Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  2. If equipped with an manual transmission, remove the engine flywheel. Refer to «Engine Flywheel Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__engine-flywheel-replacement) .
  3. Use a suitable tool to remove the crankshaft rear oil seal (1).

Scheme 62

Scheme 62: Installation Procedure
Scheme 62: Installation Procedure
  1. Using the (2) EN-42067 rear main seal installer , install a NEW crankshaft real oil seal (1).
  2. If equipped with an manual transmission, install the engine flywheel. Refer to «Engine Flywheel Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle__engine-flywheel-replacement)
  3. Install the automatic transmission flex plate. Refer to «Automatic Transmission Flex Plate Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  2. Recover the refrigerant system . Refer to «Refrigerant Recovery and Recharging (R-134a)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging-r-134a) .
  3. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  4. Remove the intake manifold cover (1). Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. Remove the air cleaner assembly (1). Refer to «Air Cleaner Assembly Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  6. Remove the air cleaner outlet duct (2). Refer to «Air Cleaner Outlet Duct Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  7. Disconnect the radiator surge tank inlet hose (1) from the engine. Refer to «Radiator Surge Tank Inlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  8. Remove the radiator inlet hose. Refer to «Radiator Inlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  9. Remove the radiator outlet hose. Refer to «Radiator Outlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  10. Disconnect the fuel feed hose from the engine. Refer to «Fuel Feed Pipe Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  11. Disconnect the air conditioning compressor and condenser hose (1). Refer to «Air Conditioning Compressor and Condenser Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  12. Prepare the transmission for removal. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  13. Disconnect the evaporative emission line at the canister purge solenoid and remove the line from the retainer.
  14. Remove the front compartment fuse block housing. Refer to «Front Compartment Fuse Block Housing Replacement»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
  15. Remove the ECM. Refer to «Engine Control Module Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  16. Disconnect the lever lock connector attached to the base of the ECM bracket.
  17. Remove the ground cable nut at the right front inner core support and remove the cable.
  18. Disconnect the engine harness retainers at the right engine compartment frame rail and position the harness on the engine.
  19. Remove the positive cable at the 100 amp pre-fuse base and position the cable on the engine.
  20. Disconnect the heater inlet hose at the heater core.
  21. Disconnect the heater outlet hose at the heater core.
  22. Disconnect the vacuum line at the brake booster.
  23. Disconnect the vacuum brake booster vacuum switch electrical connector.
  24. Remove the drivetrain and front suspension frame with the powertrain attached. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  25. Secure the powertrain to the support table using straps and binders
  26. Ensure when raising the body the following items are clear from the frame: Vacuum lines Steering knuckles Electrical wiring harnesses
  27. Separate the engine from the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  28. Disconnect electrical connectors as necessary.
  1. Install the engine to the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  2. Place the powertrain and frame assembly on the engine support table.
  3. Secure the powertrain to the support table using straps and binders.
  4. With the aid of an assistant, carefully lower the body onto the powertrain assembly.
  5. Ensure when lowering the body the following items are clear from the frame: Vacuum lines Steering knuckles Electrical wiring harnesses
  6. Install the drivetrain and front suspension frame with the powertrain attached. Refer to «Drivetrain and Front Suspension Frame Removal and Installation»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-removal) .
  7. Complete installation of the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  8. Connect the lever lock connector attached to the base of the ECM bracket.
  9. Install the ground cable nut at the right front inner core support and remove the cable.
  10. Connect the engine harness retainers at the right engine compartment frame rail and position the harness on the engine.
  11. Install the positive cable at the 100 amp pre-fuse base and position the cable on the engine.
  12. Connect the heater inlet hose at the heater core.
  13. Connect the heater outlet hose at the heater core.
  14. Connect the vacuum line at the brake booster.
  15. Connect the vacuum brake booster vacuum switch electrical connector.
  16. Install the ECM. Refer to «Engine Control Module Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  17. Install the front compartment fuse block housing. Refer to «Front Compartment Fuse Block Housing Replacement»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
  18. Connect the air conditioning compressor and condenser hose (1). Refer to «Air Conditioning Compressor and Condenser Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  19. Connect the fuel feed hose to the engine. Refer to «Fuel Feed Pipe Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  20. Install the radiator inlet hose. Refer to «Radiator Inlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  21. Install the radiator outlet hose. Refer to «Radiator Outlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  22. Connect the radiator surge tank inlet hose (1) to the engine. Refer to «Radiator Surge Tank Inlet Hose Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  23. Install the air cleaner outlet duct (2). Refer to «Air Cleaner Outlet Duct Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  24. Install the air cleaner assembly (1). Refer to «Air Cleaner Assembly Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  25. Install the intake manifold cover (1). Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  26. Refill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  27. If the engine is replaced with a new engine or has been overhauled, perform the Engine Prelubing procedure. Refer to «Engine Prelubing»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__engine-prelubing) .
  28. Recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging (R-134a)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging-r-134a) .
  29. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  30. Perform the throttle learn procedure. Refer to «Q38 Throttle Body: Throttle/Idle Learn»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
  1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  2. Recover the refrigerant system . Refer to «Refrigerant Recovery and Recharging (R-134a)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging-r-134a) .
  3. Remove the charge air cooler inlet air tube. Refer to «Charge Air Cooler Inlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  4. Remove the charger air cooler outlet tube. Refer to «Charge Air Cooler Outlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  5. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  6. Remove the intake manifold cover (1). Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  7. Remove the air cleaner assembly (1). Refer to «Air Cleaner Assembly Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  8. Remove the air cleaner outlet duct (2). Refer to «Air Cleaner Outlet Duct Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  9. Disconnect the radiator surge tank inlet hose (1) from the engine. Refer to «Radiator Surge Tank Inlet Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  10. Remove the radiator inlet hose. Refer to «Radiator Inlet Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  11. Remove the radiator outlet hose. Refer to «Radiator Outlet Hose Replacement (LTG without V03)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) , «Radiator Outlet Hose Replacement (LTG with VO3)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  12. Disconnect the fuel feed hose from the engine. Refer to «Fuel Feed Pipe Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  13. Disconnect the air conditioning compressor and condenser hose (1). Refer to «Air Conditioning Compressor and Condenser Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  14. If equipped with automatic transmission, disconnect the range selector lever cable. Refer to «Range Selector Lever Cable Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  15. If equipped with manual transmission, remove the shift control. Refer to «Shift Control Assembly Replacement»(ref-620502-S15675738622014060500000) .
  16. Remove the two piece drive shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
  17. If equipped with manual transmission, disconnect the hydraulic clutch hose/pipe from the transmission. Refer to «Hydraulic Clutch Hose/Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/clutches-manual-hydraulic/#manual-transmission-clutch) .
  18. If equipped with automatic transmission, disconnect the transmission cooler pipes from the engine and transmission.
  19. Disconnect the evaporative emission line at the canister purge solenoid and remove the line from the retainer.
  20. Remove the positive cable at the 100 amp pre-fuse base then position the cable on top the engine.
  21. Remove the front compartment fuse block housing. Refer to «Front Compartment Fuse Block Housing Replacement»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
  22. Remove the ECM. Refer to «Engine Control Module Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  23. Disconnect the lever lock connector attached to the base of the ECM bracket.
  24. Remove the ground cable nut at the right front inner core support and remove the cable.
  25. Disconnect the engine harness retainers at the right engine compartment frame rail and position the harness on the engine.
  26. Disconnect the heater inlet hose at the heater core. Refer to «Heater Inlet Hose Replacement (LCV, LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  27. Disconnect the heater outlet hose at the heater core. Refer to «Heater Outlet Hose Replacement (LTG with KL9)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Heater Outlet Hose Replacement (LTG without KL9)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  28. Disconnect the vacuum line at the brake booster. Refer to «Power Brake Booster Vacuum Check Valve and Hose Replacement (2.0L, 2.5L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  29. Disconnect the vacuum brake booster vacuum switch electrical connector.
  30. If equipped with AWD, remove the front wheel drive shaft. Refer to «Front Wheel Drive Shaft Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/axle-shafts/#wheel-drive-shafts__front-wheel-drive-shaft-replacement) , and «Front Wheel Drive Shaft Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/axle-shafts/#wheel-drive-shafts) .
  31. Ensure when raising the body the following items are clear from the frame: Vacuum lines Steering knuckles Electrical wiring harnesses
  32. Ensure that the fuel pump connector (1) clears the body structure when removing the engine.
  33. Remove the drivetrain and front suspension frame with the powertrain attached. Refer to «Drivetrain and Front Suspension Frame Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-replacement) .
  34. Secure the powertrain to the support table using straps and binders.
  35. Separate the engine from the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) for 6L45, or «Transmission Replacement»(ref-620502-S18808528732014060500000) for Tremec 6-Speed M/T.
  36. Disconnect electrical connectors as necessary.
  1. Connect electrical connectors as necessary.
  2. Install the engine to the transmission. Refer to «Transmission Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) for 6L45, or «Transmission Replacement»(ref-620502-S18808528732014060500000) for Tremec 6-Speed M/T.
  3. Remove the straps and binders securing the powertrain to the support table.
  4. Ensure when lowering the body the following items are clear from the frame: Vacuum lines Steering knuckles Electrical wiring harnesses
  5. Ensure that the fuel pump connector (1) clears the body structure when installing the engine.
  6. Install the drivetrain and front suspension frame with the powertrain attached. Refer to «Drivetrain and Front Suspension Frame Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__drivetrain-and-front-suspension-frame-replacement) .
  7. If equipped with AWD, install the front wheel drive shaft. Refer to «Front Wheel Drive Shaft Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/axle-shafts/#wheel-drive-shafts__front-wheel-drive-shaft-replacement) , and «Front Wheel Drive Shaft Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/axle-shafts/#wheel-drive-shafts) .
  8. Connect the vacuum line at the brake booster. Refer to «Power Brake Booster Vacuum Check Valve and Hose Replacement (2.0L, 2.5L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  9. Connect the vacuum brake booster vacuum switch electrical connector.
  10. Connect the heater outlet hose at the heater core. Refer to «Heater Outlet Hose Replacement (LTG with KL9)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Heater Outlet Hose Replacement (LTG without KL9)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  11. Connect the heater inlet hose at the heater core. Refer to «Heater Inlet Hose Replacement (LCV, LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  12. Connect the engine harness retainers at the right engine compartment frame rail and position the harness on the engine.
  13. Install the ground cable nut at the right inner core support and reinstall the cable.
  14. Connect the lever lock connector attached to the base of the ECM bracket.
  15. Install the ECM. Refer to «Engine Control Module Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  16. Install the front compartment fuse block housing. Refer to «Front Compartment Fuse Block Housing Replacement»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
  17. Install the positive cable at the 100 amp pre-fuse base and position the cable on the engine.
  18. Connect the evaporative emission line at the canister purge solenoid and install the line to the retainer.
  19. If equipped with automatic transmission, connect the transmission cooler pipes to the engine and transmission.
  20. If equipped with manual transmission, connect the hydraulic clutch hose/pipe to the transmission. Refer to «Hydraulic Clutch Hose/Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/clutches-manual-hydraulic/#manual-transmission-clutch) .
  21. Install the two piece drive shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
  22. If equipped with automatic transmission, connect the range selector lever cable. Refer to «Range Selector Lever Cable Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
  23. If equipped with manual transmission, install the shift control assembly. Refer to «Shift Control Assembly Replacement»(ref-620502-S15675738622014060500000) .
  24. Connect the air conditioning compressor and condenser hose. Refer to «Air Conditioning Compressor and Condenser Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  25. Connect the fuel feed hose to the engine. Refer to «Fuel Feed Pipe Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  26. Install the radiator outlet hose. Refer to «Radiator Outlet Hose Replacement (LTG without V03)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) , «Radiator Outlet Hose Replacement (LTG with VO3)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) , or «Radiator Outlet Hose Replacement (LTG without V03)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) , «Radiator Outlet Hose Replacement (LTG with VO3)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  27. Install the radiator inlet hose. Refer to «Radiator Inlet Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  28. Connect the radiator surge tank inlet hose (1) to the engine. Refer to «Radiator Surge Tank Inlet Hose Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
  29. Refill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
  30. If the engine is replaced with a new engine or has been overhauled, perform the Engine Prelubing procedure. Refer to «Engine Prelubing»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-off-vehicle__engine-prelubing) .
  31. Install the charge air cooler inlet air tube. Refer to «Charge Air Cooler Inlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  32. Install the charger air cooler outlet tube. Refer to «Charge Air Cooler Outlet Air Tube Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
  33. Recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging (R-134a)»(/cadillac/ats/i-2012-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging-r-134a) .
  34. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
  35. Perform the throttle learn procedure. Refer to «Q38 Throttle Body: Throttle/Idle Learn»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
  1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
  2. Place a drain pan under the oil drain plug.
  3. Remove the oil pan drain plug (1).
  4. Allow the oil to drain completely.
  5. Install the engine oil pan drain plug (1) and ring seal. Tighten to 25 (18 lb ft).
  6. Position a suitable drain pan under the oil filter.
  7. Remove the oil filter (1).
  8. Ensure that the oil filter gasket is still on the old oil filter, if not remove the oil filter gasket from the adapter.
  1. Install the oil filter and tighten to 30 (22 lb ft)
  2. Remove the oil drain pan from under the vehicle
  3. Lower the vehicle.
  4. Fill the engine with new engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers (LCV)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-lcv) , «Adhesives, Fluids, Lubricants, and Sealers (LTG)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-specifications__adhesives-fluids-lubricants-and-sealers-ltg) .
  5. Start the engine.
  6. Inspect for oil leaks after engine start up.
  7. Reset the oil life monitor. Refer to «GM Oil Life System Resetting»(/cadillac/ats/i-2012-2014/remont/lubrication-system/#maintenance-and-lubrication__gm-oil-life-system-resetting) .

See also:
• Fastener Caution
• Air Cleaner Outlet Duct Replacement (LCV)
• Vacuum Operated Engine Mounts Description and Operation
• Diagnostic System Check - Vehicle
• Drivetrain and Front Suspension Frame Removal and Installation
• Exhaust Manifold Replacement (LCV)
• Engine Compartment Lower Noise Shield Replacement
• Front Compartment Front Sight Shield Replacement
• Special Tools
• Cooling System Draining and Filling (Static Fill)
• Cooling System Draining and Filling (GE 47716)
• Lifting and Jacking the Vehicle
• Turbocharger Cleaning and Inspection
• Torque-to-Yield Fastener Caution
• Radiator Surge Tank Replacement (LCV, LTG)
• Generator Replacement (LCV)
• Intake Manifold Cleaning and Inspection
• Adhesives, Fluids, Lubricants, and Sealers (LCV)
• Adhesives, Fluids, Lubricants, and Sealers (LTG)
• Camshaft Timing Chain, Sprocket, and Tensioner Cleaning and Inspection
• Camshaft Timing Chain and Tensioner Removal
• Fuel Injection Fuel Rail Assembly Replacement
• Cylinder Head Disassemble
• Cylinder Head Cleaning and Inspection
• Cylinder Head Assemble
• Camshaft Timing Chain and Tensioner Installation
• Component Fastener Tightening Caution
• Air Conditioning Compressor Replacement (LCV)
• Front Differential Carrier Assembly Replacement
• Front Wheel Drive Intermediate Shaft Housing Replacement
• Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LCV, LFX, LTG with VO3)
• Oil Pan Removal (LCV)
• Oil Pan Removal (LTG)
• Clutch Assembly Replacement
• Engine Flywheel Cleaning and Inspection
• Automatic Transmission Flex Plate Cleaning and Inspection
• Refrigerant Recovery and Recharging (R-134a)
• Front Compartment Fuse Block Housing Replacement
• Engine Prelubing
• Q38 Throttle Body: Throttle/Idle Learn
• Two-Piece Propeller Shaft Replacement
• Hydraulic Clutch Hose/Pipe Replacement
• Power Brake Booster Vacuum Check Valve and Hose Replacement (2.0L, 2.5L)
• Front Wheel Drive Shaft Replacement - Left Side
• Front Wheel Drive Shaft Replacement - Right Side
• Drivetrain and Front Suspension Frame Replacement
• GM Oil Life System Resetting
• Drive Belt Replacement
• Camshaft Position Actuator and Camshaft Replacement - Exhaust
• Engine Flywheel Replacement

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