Engine Mechanical - 3.6l - Repair Instructions - on Vehicle Buick LaCrosse II

Scheme 90

Drive Belt Replacement

Scheme 91

Drive Belt Tensioner Replacement

Removal Procedure

1. Remove the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Completely loosen the idler pulley bolt.
3. Remove the drive belt idler pulley bolt.
4. Remove the drive belt idler pulley.

Installation Procedure

1. Install the drive belt idler pulley.
2. Install the drive belt idler pulley bolt. Tighten Tighten the drive belt idler pulley bolt to 58 N.m (43 lb ft).
3. Install the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Engine Support Fixture

Special Tools

1. EN-28467-B Universal Engine Support Fixture
2. EN-28467-501B Engine Support Fixture Adapters
3. EN-36857 Engine Lift Bracket

For equivalent regional tools, refer to Special Tools .

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/buick/lacrosse/ii-2009-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
3. Use a grade 10.9 bolt to install a EN-36857 bracket (1) to the right cylinder head in the location shown. Tighten the bolt to 65 N.m (48 lb ft).
4. Use a grade 10.9 bolt with a 25 mm (1 in) spacer to install the EN-36857 bracket (1) to the left cylinder head in the location shown. Tighten the bolt to 65 N.m (48 lb ft).
5. Assemble the EN-28467-501B legs (1) to the EN-28467-B cross bar.
6. Install the support hook (1) to the EN-28467-B fixture (2).
7. Install the support hook (1) to the EN-36857 bracket.
8. Raise the engine to release the pressure off of the engine mounts.
9. Reverse the procedure for removal.

Engine Mount Inspection

1. Install the engine support fixture. Refer to «Engine Support Fixture»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-support-fixture) .
2. Observe the engine mount while raising the engine. Raising the engine removes the weight from the engine mount and creates slight tension on the rubber.
3. Replace the engine mount if the engine mount exhibits any of the following conditions: The hard rubber is covered with heat check cracks. The rubber is separated from the metal plate of the engine mount. The rubber is split through the center of the engine mount. The engine mount itself is leaking fluid.
4. For engine mount replacement. Refer to «Engine Mount Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Scheme 92

Engine Mount Replacement - Right Side

Scheme 93

Engine Mount Bracket Replacement - Right Side

Scheme 94

Intake Manifold Cover Replacement

1. Remove the engine cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Disconnect the positive crankcase ventilation (PCV) fresh air pipe from the air cleaner duct.
3. Disconnect the PCV air pipe from the valve cover.

1. Connect the PCV air pipe to the valve cover valve.
2. Connect the PCV fresh air pipe to the air cleaner duct.
3. Install the engine cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Scheme 95

Positive Crankcase Ventilation Tube Replacement - Rear (LF1, LFW or LFX)

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle)
2. Disconnect and remove the positive crankcase ventilation (PCV) tube (1) from the intake manifold and right camshaft cover.
3. Remove the evaporative emission (EVAP) hose from the intake manifold and EVAP solenoid.
4. Remove the fuel pump cover bolt (1).
5. Remove the fuel pump cover (2).
6. Remove the fuel line booster hose bracket.
7. Disconnect the brake booster vacuum hose.
8. Disconnect electrical connectors as needed.
9. Remove engine coolant air bleed pipe. Refer to «Engine Coolant Air Bleed Pipe Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
10. Remove the intake manifold bolts (1).
11. Remove the intake manifold assembly (2).
12. Remove and discard the intake manifold gasket (1).
13. Transfer parts as needed.

1. Install the NEW intake manifold gasket (1).
2. Install the intake manifold assembly (2).
3. Install the intake manifold bolts (1).
4. Tighten the intake manifold bolts in the sequence shown.
5. Tighten the intake manifold bolts in sequence to 25 N.m (18 lb ft).
6. Tighten the intake manifold bolts a second pass in sequence to 25 N.m (18 lb ft).
7. Install the fuel pump cover (2).
8. Install the fuel pump cover bolt (1) and tighten to 10 N.m (89 lb in).
9. Connect the EVAP hose to the upper intake manifold and EVAP solenoid.
10. Connect the PCV tube assembly (1) to the upper intake manifold and the right camshaft cover.
11. Install coolant hose.
12. Install intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the oil level indicator tube bracket bolt (1).
2. Remove the oil level indicator and tube (2) by sliding the tube out from the lower crankcase hole.
3. Remove and discard the O-ring from the oil level indicator tube if damaged.

1. Install a NEW O-ring on the oil level indicator tube.
2. Install the oil level indicator and tube (2) by sliding the tube down through the lower crankcase hole.
3. Install the oil level indicator tube bracket bolt (1) and tighten to 10 N.m (89 lb in).

Scheme 96

Oil Filter Adapter Replacement

Crankshaft Balancer Replacement

Special Tools

1. EN-46106 Flywheel Holding Tool
2. J-38416-2 Crankshaft Button
3. J-41816 Crankshaft Balancer Remover
4. J-41998-B Crankshaft Balancer Installer
5. J-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Remove the right front wheelhouse liner. Refer to «Front Wheelhouse Front Liner Replacement»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
2. Remove the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Install the engine support fixture. Refer to «Engine Support Fixture»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-support-fixture) .
4. Remove the starter. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
5. Install the EN-46106 tool through the starter mounting hole.
6. Using engine support fixture, lower engine approximately two inches.
7. Remove the crankshaft balancer bolt. Discard the bolt.
8. Install the J-38416-2 button in the nose of the crankshaft.
9. Install the J-41816 remover in order to remove the crankshaft balancer.
10. Tighten the center bolt of the J-41816 remover in order to pull the crankshaft balancer off of the crankshaft.
11. Remove the J-41816 remover from the crankshaft balancer.

1. The EN-46106 tool must be installed onto the flywheel.
2. Use the J-41998-B installer, nut, bearing and washer to install the crankshaft balancer.
3. Apply lubricant to the inside of the crankshaft balancer hub bore.
4. Place the crankshaft balancer in position on the crankshaft.
5. Thread the J-41998-B installer in the crankshaft. Ensure you engage at least 10 threads of the J-41998-B installer before pressing the crankshaft balancer in place.
6. Push the crankshaft balancer into position by tightening the nut on the J-41998-B installer until the large washer bottoms out on the crankshaft end.
7. Remove the J-41998-B installer.
8. Install the NEW crankshaft balancer bolt.
9. Tighten the crankshaft balancer bolt to 100 N.m (74 lb ft) and an additional 150 degrees using the J-45059 meter.
10. Remove the EN-46106 tool.
11. Install the starter. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
12. Install the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
13. Install the right front wheelhouse liner. Refer to «Front Wheelhouse Front Liner Replacement»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
14. Remove the engine support fixture. Refer to «Engine Support Fixture»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-support-fixture) .

Crankshaft Front Oil Seal Replacement

Special Tools

EN-29184 Oil Seal Installer

For equivalent regional tools, refer to Special Tools .

1. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .
2. Remove the crankshaft front oil seal using a suitable flat blade tool.

1. Use the EN-29184 installer (1) or equivalent to install the crankshaft front oil seal (2).
2. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .

Camshaft Cover Replacement - Left Side

Special Tools

EN-46101 Spark Plug Tube Seal Guide

For equivalent regional tools, refer to Special Tools .

1. Remove the ignition coils. Refer to «Ignition Coil Replacement - Bank 2»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
2. Disconnect and remove the engine harness from the camshaft cover.
3. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
4. Remove the power steering reservoir bracket and reposition without disconnecting the hoses. Refer to «Power Steering Fluid Reservoir Bracket Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
5. Remove the left camshaft cover bolts.
6. Remove the left camshaft cover from the left cylinder head.
7. Clean the mating surfaces of the cylinder head and the camshaft cover. Refer to «Camshaft Cover Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
8. Install the EN-46101 guide onto the spark plug tubes of the left cylinder head.

1. Install new camshaft cover bolt grommets prior to installing the camshaft cover bolts.
2. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant equivalent, on the engine front cover split lines (1).
3. Place the left camshaft cover into position onto the left cylinder head.
4. Loosely install the left camshaft cover bolts.
5. Tighten the left camshaft cover bolts in the sequence shown to 10 N.m (89 lb in).
6. Install the power steering reservoir bracket. Refer to «Power Steering Fluid Reservoir Bracket Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
7. Connect and install the engine harness to the camshaft cover.
8. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
9. Remove the EN-46101 guide from the spark plug tubes of the left cylinder head.
10. Install the ignition coils. Refer to «Ignition Coil Replacement - Bank 2»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .

Camshaft Cover Replacement - Right Side

Special Tools

EN-46101 Spark Plug Tube Seal Guide

For equivalent regional tools, refer to Special Tools .

1. Remove the ignition coils. Refer to «Ignition Coil Replacement - Bank 1»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
2. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Remove the power steering reservoir from the bracket and reposition without disconnecting the hoses. Refer to «Power Steering Fluid Reservoir Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
4. Disconnect and remove the engine harness from the camshaft cover.
5. Remove the right camshaft cover bolts.
6. Remove the right camshaft cover from the right cylinder head.
7. Clean the mating surfaces of the cylinder head and the camshaft cover. Refer to «Camshaft Cover Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle)
8. Install the EN-46101 guide onto the spark plug tubes of the right cylinder head.

1. Install new camshaft cover bolt grommets prior to installing the camshaft cover bolts.
2. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, on the engine front cover split lines (1).
3. Place the right camshaft cover into position onto the right cylinder head.
4. Loosely install the right camshaft cover bolts.
5. Tighten the right camshaft cover bolts in the sequence shown to 10 N.m (89 lb in).
6. Connect and install the engine harness to the camshaft cover.
7. Install the power steering reservoir. Refer to «Power Steering Fluid Reservoir Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
8. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
9. Remove the EN-46101 guide from the spark plug tubes of the right cylinder head.
10. Install the ignition coils. Refer to «Ignition Coil Replacement - Bank 1»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .

Engine Front Cover Replacement

Special Tools

EN-46109 Engine Front Cover Installation Guide Pins

For equivalent regional tools, refer to Special Tools .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the camshaft covers. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) , and «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
3. Drain the engine coolant. Refer to «Cooling System Draining and Filling (Static Fill)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
4. Remove the water outlet with the radiator hose and reposition aside. Refer to «Water Outlet Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
5. Remove the generator. Refer to «Generator Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
6. Remove the power steering fluid reservoir and reposition the power steering fluid reservoir in order to provide access. Refer to «Power Steering Fluid Reservoir Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
7. Remove the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
8. Remove the power steering pump upper front bolt and loosen the remaining two bolts. Refer to «Power Steering Pump Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
9. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .
10. Remove the camshaft position sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
11. Remove the belt tensioner. Refer to «Drive Belt Tensioner Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle)
12. Remove the camshaft position actuator solenoid valves from the front cover. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
13. Remove the engine front cover with the water pump. Refer to «Engine Front Cover Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-removal) .
14. Disassemble the engine front cover. Refer to «Engine Front Cover Disassemble»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-disassemble) .
15. Carefully clean the engine front cover sealing surfaces. Refer to «Engine Front Cover Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-cleaning-and-inspection) .
16. Carefully clean the engine front cover sealing surfaces. Refer to «Engine Front Cover Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-cleaning-and-inspection) .
17. Use compressed air in order to remove any engine coolant from the engine cooling passages and from the top of the oil pan scraper (windage tray).

1. Assemble the engine front cover. Refer to «Engine Front Cover Assemble»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-assemble) .
2. Use the EN-46109 pins in order to install the engine front cover. Refer to «Engine Front Cover Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-front-cover-installation) .
3. Install the camshaft position actuator solenoid valves to the front cover. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
4. Install the camshaft position sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .
6. Install the power steering pump upper front bolt and tighten the remaining two bolts. Refer to «Power Steering Pump Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
7. Install the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
8. Install the power steering fluid reservoir. Refer to «Power Steering Fluid Reservoir Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
9. Install the generator bracket with the generator and the belt tensioner. Refer to «Generator Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
10. Install the water outlet. Refer to «Water Outlet Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
11. Install the purge vent hose to the water outlet. Refer to «Engine Coolant Air Bleed Pipe Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
12. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
13. Install the camshaft covers. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) , and «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
14. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
15. Install the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle)
16. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
4. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
5. Remove the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
6. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
7. Remove the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Removal - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .
8. Remove the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
9. Remove the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-removal) .
10. Remove the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
11. Remove the left bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
12. Remove the left bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
13. Remove the left bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-removal) .
14. Remove the left bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation)
15. Clean and inspect all of the camshaft timing drive components. Refer to «Camshaft Timing Drive Components Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) . Replace components as necessary.

1. Install the left bank secondary camshaft drive chain.
2. Install the left bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-installation) .
3. Install the left bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
4. Install the left bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
5. Install the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
6. Install the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-installation) .
7. Install the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-installation) .
8. Install the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Installation - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-installation) .
9. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
10. Install the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation) .
11. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
12. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
13. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
14. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
4. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
5. Remove the right bank secondary camshaft drive chain.

1. Ensure the stage 1 camshaft timing is correct. Refer to «Setting Camshaft Timing»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__setting-camshaft-timing) .
2. Install the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation)
3. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
4. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
5. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
6. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .

1. Install the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
2. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .

1. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
2. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the secondary shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .

1. Install the secondary shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
2. Install the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .

1. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
2. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the left bank secondary camshaft drive chain guide.

1. Install the left bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation)
2. Install the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the spark plugs in order to ease crankshaft/engine rotation. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
2. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
3. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
4. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .

1. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
2. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
4. Install the spark plugs. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
4. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
5. Remove the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
6. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
7. Remove the primary camshaft drive chain upper guide. Refer to «Primary Timing Chain Guide Removal - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .
8. Remove the primary camshaft timing chain.

1. Install the primary camshaft timing chain. Refer to «Primary Camshaft Intermediate Drive Chain Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-installation) .
2. Install the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Installation - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-installation) .
3. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
4. Install the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation) .
5. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
6. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
7. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
8. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
3. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
4. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
5. Remove the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
6. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
7. Remove the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Removal - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .
8. Remove the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
9. Remove the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-removal) .
10. If you are servicing the left bank camshaft intermediate drive chain idler, perform the following steps: Remove the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) . Remove the left bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) . Remove the left bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) . Remove the left bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) . Remove the left bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-removal) .

1. If you are servicing the left bank idler sprocket, perform the following steps: Install the left bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-installation) . Install the left bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation) . Install the left bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) . Install the left bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) . Install the left bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
2. Install the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-installation) .
3. Install the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-installation) .
4. Install the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Installation - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-installation) .
5. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
6. Install the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation) .
7. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
8. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
9. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
10. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the spark plugs in order to ease crankshaft/engine rotation. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
3. Remove the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-removal) .
4. Remove the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-removal) .
5. Remove the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-removal) .
6. Remove the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
7. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
8. Remove the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Removal - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .
9. Remove the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
10. Remove the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-removal) .

1. Ensure stage 1 camshaft timing is correct. Refer to «Setting Camshaft Timing»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__setting-camshaft-timing) .
2. Install the right bank camshaft intermediate drive chain idler. Refer to «Timing Chain Idler Sprocket Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__timing-chain-idler-sprocket-installation) .
3. Install the primary camshaft drive chain. Refer to «Primary Camshaft Intermediate Drive Chain Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-installation) .
4. Install the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Installation - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-installation) .
5. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
6. Install the right bank secondary camshaft drive chain. Refer to «Secondary Camshaft Intermediate Drive Chain Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-intermediate-drive-chain-installation) .
7. Install the right bank secondary camshaft drive chain guide. Refer to «Secondary Timing Chain Guide Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-guide-installation) .
8. Install the right bank secondary camshaft drive chain shoe. Refer to «Secondary Camshaft Drive Chain Shoe Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-camshaft-drive-chain-shoe-installation) .
9. Install the right bank secondary camshaft drive chain tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
10. Install the spark plugs. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
11. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .

1. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
2. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

1. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the primary camshaft drive chain lower guide bolts.
3. Remove the primary camshaft drive chain lower guide.

1. Position the primary camshaft drive chain lower guide to the oil pump.
2. Install the primary camshaft drive chain lower guide bolts and tighten to 25 N.m (18 lb ft).
3. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
2. Remove the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Remove the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Removal - Upper»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .

1. Install the primary upper camshaft drive chain guide. Refer to «Primary Timing Chain Guide Removal - Lower»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-timing-chain-guide-removal) .
2. Install the primary camshaft drive chain tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
3. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .

Camshaft Position Actuator Replacement - Bank 1

Special Tools

1. EN49982-1 Timing Chain Retainer
2. EN49982-2 Timing Chain Retainer

For equivalent regional tools, refer to Special Tools .

1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
2. Remove the camshaft position actuator solenoid valve solenoid - intake. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
3. Remove the intake camshaft position sensor. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
4. Remove the exhaust camshaft position sensor. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Remove the camshaft position actuator solenoid valve solenoid - exhaust. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
6. Rotate engine clockwise using crankshaft dampener retaining bolt until the flats at the rear ends of the camshafts are pointing up. This puts the camshafts on "base circle" and will reduce their tendency to rotate from valve spring pressure when the camshaft position actuators/drive chains are removed.
7. Loosen intake and/or exhaust camshaft position actuator retaining bolts, depending on which camshaft position actuator and/or camshaft you will be servicing. If servicing both camshaft position actuators and/or camshafts, loosen both bolts.
8. Mark the position of the chain to the camshaft position actuator - intake.
9. Mark the position of the chain to the camshaft position actuator - exhaust.
10. Remove camshaft front cap bolts (1).
11. Remove the camshaft front cap (1).
12. Loosen wingnut (4) to open the clamping area of EN49982-1 retainer.
13. Install EN49982-1 retainer intake side chain holder onto front cover by screwing in the thumbscrew (2) on the EN49982-1 retainer finger-tight.
14. Tighten wingnut (4) so EN49982-1 retainer closes over and firmly grasps timing chain.
15. EN49982-2 retainer (1) will be installed in the following steps such that it wedges between an internal rib (2) that is cast into the inside of the front cover (shown in dotted line above) and the timing chain and spring-loaded tensioner shoe (3), holding the chain in position. The wedge will be left in place during the cam position actuator and/or camshaft service.
16. Insert the EN49982-2 retainer between the two camshaft position actuators with the "teeth" on the EN49982-2 retainer facing toward the front cover.
17. Once the wedge portion of EN49982-2 retainer is below the camshaft position actuators, rotate the EN49982-2 retainer until the flat in the handle faces toward the intake camshaft position actuator. This orients the "teeth" toward the chain.
18. Drop the wedge down until it begins to engage the timing chain and the belt casting (2).
19. If possible shine a strong light down from above, between the camshaft position actuators, and see the wedge in overall position as shown in the above graphic.
20. Using a 20 mm wrench on the cast hexagonal portion of the exhaust camshaft, rotate the camshaft toward the intake camshaft while pushing down on the handle of the EN49982-2 retainer.
21. This rotation of the camshaft will compress the tensioner shoe (3) against the spring force of the tensioner, opening up a gap between the chain and the internal rib in the front cover. The wedge will then drop into this gap. You will feel a distinct click as the teeth engage the chain.
22. Release the force on the wrench, allowing the spring tension to close the tensioner shoe against the wedge portion of EN49982-2 retainer. You should be able to lightly tug on the EN49982-2 retainer and it should stay in position. Repeat Steps 20 and 21 if necessary to re-insert the EN49982-2 retainer until you are certain it is in position and will stay in position.
23. With EN49982-2 retainer in position and with the 20 mm wrench removed, there should now be some slack in the timing drive chain as indicated in the graphics shown.
24. Do not pry against the face of the camshaft position actuators or the position actuator retaining bolt.
25. Position a screwdriver or small pry bar between a camshaft cap and camshaft lobe. Carefully move/pry the camshafts as far as possible toward the rear/flywheel end of the engine.
26. The EN49982-1 retainer and EN49982-2 retainer should be in position as shown, they must be left in position during the servicing of the camshaft position actuator(s) and/or camshaft(s).
27. Remove and capture the plastic thrust washers (1) in the following steps. Ensure the plastic thrust washer does not fall into the front cover area.
28. To remove the intake camshaft position actuator, remove the loosened retaining bolt. To remove only the exhaust camshaft position actuator, skip the steps for removing the intake camshaft position actuator. However, the EN49982-1 retainer MUST be installed as discussed even if the intake side will not be serviced or the timing of the camshaft chains will be lost.
29. Slide the camshaft position actuator forward and off the end of the intake camshaft. The slot in the EN49982-1 retainer will allow the tool to move forward enough to disengage the camshaft position actuator from the front of the camshaft. Remove the plastic thrust washer when removing the camshaft position actuator from the end of the camshaft.
30. Tilt the camshaft position actuator forward and out/away from the engine.
31. Allow the chain to rest on the EN49982-1 retainer and EN49982-2 retainer in position during service.

1. Install plastic camshaft position actuator thrust washer (1) between cylinder head face and camshaft position actuator on assembly.
2. It may help to carefully pry the camshaft forward and to move the EN49982-1 retainer backward via the slot to reengage the position actuator to the camshaft. The dowel pin on the camshaft position actuator must be aligned with the slot in the camshaft nose for reassembly.
3. Install the intake camshaft position actuator first by inserting the actuator between the timing chain and front cover. Tilt the actuator in and engage the chain while aligning the marks you made on the chain and position actuator.
4. Ensure the camshaft position actuator fits snugly to the end of the camshaft.
5. Install the intake camshaft position actuator retaining bolt, and lightly tighten the bolt to hold the camshaft actuator in place. DO NOT torque at this time.
6. Install the exhaust camshaft position actuator retaining bolt, and lightly tighten the bolt to hold the camshaft actuator in place. DO NOT torque at this time.
7. Double-check that the marks on both the intake and exhaust camshaft position actuators to ensure that they are aligned with their respective paint marks on the chain.
8. Using a 20 mm wrench on the cast hexagonal portion of the exhaust camshaft, rotate the camshaft clockwise while pulling up on the handle of the EN49982-2 retainer.
9. Remove EN49982-2 retainer.
10. Release the pressure on the wrench. The timing chain should now be tight and should lose the slack the wedge was providing.
11. Torque one or both camshaft position actuator retaining bolts to 58 N.m (43 lb ft).
12. Unscrew the wingnut on EN49982-1 retainer to release timing chain, and then remove EN49982-1 retainer from the front cover by unscrewing the thumbscrew (2).
13. Install camshaft front cap and bolts (1).
14. Tighten the camshaft front cap outer bolts to 10 N.m (89 lb in).
15. Tighten the camshaft front cap inner bolts to 10 N.m (89 lb in).
16. Install the camshaft position actuator solenoid valve solenoid - exhaust. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
17. Install the camshaft position actuator solenoid valve solenoid-intake. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
18. Install the intake camshaft position sensors. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
19. Install the exhaust camshaft position sensor. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
20. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .

Camshaft Position Actuator Replacement - Bank 2

Special Tools

EN-48313 Timing Chain Retention Tool

For equivalent regional tools, refer to Special Tools .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the left camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
3. Remove the left intake and exhaust camshaft position sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
4. Remove the left intake and exhaust camshaft position actuator solenoids. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Rotate the crankshaft balancer using the balancer bolt until the camshafts are in a neutral (low tension) position. The camshafts will be parallel with the camshaft cover rail (1).
6. Use a paint stick to create an alignment mark on one of the timing chain links (2) and the adjacent tooth on the exhaust camshaft position actuator (1).
7. Use a paint stick to create an alignment mark on one of the timing chain links (3) and the adjacent tooth on the intake camshaft position actuator (4).
8. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the camshafts toward each other in order to create slack in the chain between the actuators.
9. Unscrew the EN-48313 tool so that the legs of the tool are retracted.
10. Insert the EN-48313 tool between the camshaft actuators, rearward of the timing chain until the bottom line that is scribed in the body of the tool (2) is adjacent to the top surface of the cylinder head (1). This is the approximate installed position.
11. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
12. Partially expand the legs (1, 3) of the EN-48313 tool by turning the T-shaped handle clockwise.
13. Insert the leg of the tool (1) behind the timing chain guide (2).
14. Continue expanding the EN-48313 tool until the legs (1, 3) contact the timing chain. Do not tighten at this time.
15. Hand tighten the EN-48313 tool.
16. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the camshafts toward each other in order to create slack in the chain between the actuators.
17. The EN-48313 tool is now properly installed to hold the timing chain in position.
18. Use an open end wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
19. If replacing the exhaust camshaft position actuator, then remove the bolt and the actuator.
20. If replacing the intake camshaft position actuator, then remove the bolt and the actuator.
21. If removing both the exhaust and intake camshaft actuators, the timing chain can be draped over the EN-48313 tool once the actuators have been removed.
22. Rotate the actuator in order to align the opening in the actuator reluctor wheel with the cam sensor boss in the front cover, to allow actuator removal.
23. Remove the camshaft thrust washer.

1. Align the exhaust camshaft actuator alignment mark (1) to the timing chain alignment mark (2) made during disassembly.
2. Ensure that the intake camshaft actuator alignment mark (4) and the timing chain alignment mark (3) are also aligned.
3. Position the exhaust camshaft actuator to the camshaft and install the actuator bolt hand tight.
4. Remove the EN-48313 tool.
5. If equipped, ensure the proper camshaft thrust washer is used. Use a 1.6 mm (0.063 in) thrust washer on applications that have 5 attaching screws on the back side of the camshaft position actuator (1). Use a 1.1 mm (0.043 in) thick thrust washer with yellow speckles on applications that have 4 attaching screws on the back side of the camshaft position actuator (2).
6. Install the thrust washer, if applicable.
7. If the exhaust camshaft position actuator has been replaced, then tighten the bolt to 58 N.m (43 lb ft).
8. If the intake camshaft position actuator has been replaced, then tighten the bolt to 58 N.m (43 lb ft).
9. If both the exhaust and intake has been replaced, then tighten bolt to 58 N.m (43 lb ft).
10. Install the left intake and exhaust camshaft position actuator solenoids. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
11. Install the left intake and exhaust camshaft position sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
12. Install the left camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
13. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Setting Camshaft Timing

Note. Setting the camshaft timing is necessary whenever the camshaft drive system has been disturbed such that the relationship between any chain and sprocket has been lost. Even when only one sprocket is involved, multiple crankshaft rotations will not produce conditions where correct timing can be confirmed.

Follow the left bank secondary camshaft drive chain replacement procedures to reset the camshaft timing. Refer to Secondary Camshaft Intermediate Drive Chain Replacement - Left Side .

Camshaft Replacement - Left Side

Special Tools

1. EN-48589 Crankshaft Rotation Socket
2. EN-48383 Timing Chain Retention Tool

For equivalent regional tools, refer to Special Tools .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the fuel pump from the cylinder head. Refer to «Fuel Pump Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions__fuel-pump-replacement) .
3. Remove the left bank camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
4. Remove the camshaft sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Remove the camshaft position actuator solenoid. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
6. Remove the camshaft position actuator. Refer to «Camshaft Position Actuator Replacement - Bank 2»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-position-actuator-replacement-bank) .
7. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .
8. Rotate the crankshaft with the EN-48589 socket until the camshafts are in a neutral (low tension) position. The camshaft flats will be parallel with the camshaft cover rail (1).
9. Loosen the camshaft position actuator bolt.
10. Install the EN-48383 tool in order to retain the timing chain. Firmly tighten the EN-48383 tool nuts.
11. Mark the timing chain and the respective locations on the camshaft position actuators (1-4).
12. Remove the camshaft position actuator bolt.
13. Remove the camshafts. Refer to «Camshaft Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-removal-left-side) .

1. Locate the camshafts to the cylinder head and assemble the camshaft actuators to the camshafts.
2. Install the camshafts and the camshaft bearing caps. Refer to «Camshaft Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-installation-left-side) .
3. Remove the EN-48383 tool.
4. Install and tighten the camshaft position actuators. Refer to «Camshaft Position Actuator Installation - Left Side Intake»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-position-actuator-installation-left) , and «Camshaft Position Actuator Installation - Left Side Exhaust»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-position-actuator-installation-left) .
5. Install the intake camshaft position actuator solenoid. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
6. Install the camshaft sensors. Refer to «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
7. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__crankshaft-balancer-replacement) .
8. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
9. Install the fuel pump to the cylinder head. Refer to «Fuel Pump Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions__fuel-pump-replacement) .
10. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
3. Remove the camshaft sensors. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
4. Remove the intake camshaft position actuator solenoid. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Remove the Camshaft Position Actuator. Refer to «Camshaft Position Actuator Replacement - Bank 1»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-position-actuator-replacement-bank) .
6. Remove the camshaft bearing caps and the camshaft. Refer to «Camshaft Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-removal-right-side) .

1. Locate the camshafts to the cylinder head and assemble the camshaft actuators to the camshafts.
2. Install the camshafts and the camshaft bearing caps. Refer to «Camshaft Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-installation-right-side) .
3. Install and tighten the camshaft position actuators. Refer to «Camshaft Position Actuator Installation - Right Side Intake»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-position-actuator-installation-right) , and «Camshaft Position Actuator Installation - Right Side Exhaust»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-position-actuator-installation-right) .
4. Install the intake camshaft position actuator solenoid. Refer to «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Install the camshaft sensors. Refer to «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , and «Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
6. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
7. Install the intake manifold. Refer to «Intake Manifold Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the applicable camshaft(s). Refer to «Camshaft Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-replacement-left-side) .
2. Remove the rocker arms.
3. Clean and inspect the camshaft(s) and the rocker arm(s). Repair or replace as necessary. Refer to «Camshaft Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-cleaning-and-inspection) , and «Valve Lifter Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-lifter-cleaning-and-inspection) .

1. Install the rocker arms.
2. Install the camshaft(s). Refer to «Camshaft Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-replacement-left-side) .

1. Remove the applicable camshaft(s). Refer to «Camshaft Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the rocker arms.
3. Clean and inspect the camshaft(s) and the rocker arm(s). Repair or replace as necessary. Refer to «Camshaft Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-cleaning-and-inspection) , and «Valve Lifter Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-lifter-cleaning-and-inspection) .
4. Clean and inspect the valve rocker arm. Refer to «Valve Rocker Arm Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-rocker-arm-cleaning-and-inspection)

1. Install the rocker arms.
2. Install the camshaft(s). Refer to «Camshaft Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the applicable camshafts. Refer to «Camshaft Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-replacement-left-side) .
2. Remove the rocker arms. Refer to «Valve Rocker Arm Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Remove the lifters. Refer to «Valve Lifter Removal - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle)
4. Clean and inspect the camshafts, rocker arms and lifters. Repair or replace as necessary. Refer to «Camshaft Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-cleaning-and-inspection) , and «Valve Lifter Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-lifter-cleaning-and-inspection) .
5. Clean and inspect the rocker arm. Refer to «Valve Rocker Arm Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-rocker-arm-cleaning-and-inspection)

1. Install the lifters.
2. Install the rocker arms. Refer to «Valve Rocker Arm Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Install the camshafts. Refer to «Camshaft Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-replacement-left-side) .

1. Remove the applicable camshaft(s). Refer to «Camshaft Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the rocker arms. Refer to «Valve Rocker Arm Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
3. Remove the lifters. Refer to «Valve Lifter Removal - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
4. Clean and inspect the camshaft(s) and the rocker arm(s) and lifter. Repair or replace as necessary. Refer to «Camshaft Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__camshaft-cleaning-and-inspection) , «Valve Lifter Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-lifter-cleaning-and-inspection) , and «Valve Rocker Arm Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-rocker-arm-cleaning-and-inspection) .

1. Install the lifters. Refer to «Valve Lifter Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-lifter-installation-right-side) .
2. Install the rocker arms. Refer to «Valve Rocker Arm Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__valve-rocker-arm-installation-right) .
3. Install the applicable camshaft(s). Refer to «Camshaft Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Valve Stem Oil Seal and Valve Spring Replacement - Left Side

Special Tools

1. EN-39313 Spark Plug Port Adapter
2. EN-46106 Flywheel Holding Tool
3. EN-46110 On-Vehicle Valve Spring Compressor
4. EN-46116 Valve Stem Seal Remover/Installer

For equivalent regional tools, refer to Special Tools .

Note. This procedure is not used in Brazil.

1. Remove the rocker arms. Refer to «Valve Rocker Arm Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
3. Install the EN-46106 tool in order to prevent crankshaft rotation.
4. Remove the spark plug from the applicable cylinder. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Install the EN-39313 adapter to the applicable cylinder.
6. Connect the EN-39313 adapter to a compressed air source.
7. Install the EN-46110 compressor above the applicable cylinder as shown.
8. Tighten the EN-46110 compressor nut (2).
9. Remove the valve keepers.
10. Loosen the EN-46110 compressor nut.
11. Remove the valve spring retainer.
12. Remove the valve spring.
13. Use the EN-46116 remover/installer (1) in order to remove the valve stem seal (2).

1. Use the EN-46116 remover/installer (1) in order to install the valve stem seal (2).
2. Install the valve spring.
3. Install the valve spring retainer.
4. Install the EN-46110 compressor above the applicable valve spring as shown. Tighten the EN-46110 compressor nut (2).
5. Install the valve spring keepers.
6. Remove the EN-46110 compressor.
7. Disconnect the EN-39313 adapter from the compressed air source.
8. Remove the EN-39313 adapter.
9. Install the spark plugs. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
10. Install the rocker arms. Refer to «Valve Rocker Arm Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
11. Remove the EN-46106 tool in order to prevent crankshaft rotation.
12. Install the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .

Valve Stem Oil Seal and Valve Spring Replacement - Right Side

Special Tools

1. EN-39313 Spark Plug Port Adapter
2. EN-46106 Flywheel Holding Tool
3. EN-46110 On-Vehicle Valve Spring Compressor
4. EN-46116 Valve Stem Seal Remover/Installer

For equivalent regional tools, refer to Special Tools .

Note. This procedure is not used in Brazil.

1. Remove the rocker arms. Refer to «Valve Rocker Arm Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
3. Install the EN-46106 tool in order to prevent crankshaft rotation.
4. Remove the spark plug from the applicable cylinder. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
5. Install the EN-39313 adapter to the applicable cylinder.
6. Connect the EN-39313 adapter to a compressed air source.
7. Install the EN-46110 compressor above the applicable cylinder as shown.
8. Tighten the EN-46110 compressor nut (2).
9. Remove the valve keepers.
10. Loosen the EN-46110 compressor nut.
11. Remove the valve spring retainer.
12. Remove the valve spring.
13. Use the EN-46116 remover/installer (1) in order to remove the valve stem seal (2).

1. Use the EN-46116 remover/installer (1) in order to install the valve stem seals (2).
2. Install the valve spring.
3. Install the valve spring retainer.
4. Install the EN-46110 compressor above the applicable valve spring as shown. Tighten the EN-46110 compressor nut (2).
5. Install the valve spring keepers.
6. Remove the EN-46110 compressor.
7. Disconnect the EN-39313 adapter from the compressed air source.
8. Remove the EN-39313 adapter.
9. Install the spark plugs. Refer to «Spark Plug Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
10. Install the rocker arms. Refer to «Valve Rocker Arm Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
11. Remove the EN-46106 tool.
12. Install the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .

Cylinder Head Replacement - Left Side (LF1, LFW or LFX)

Special Tools

EN-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
2. Remove the left bank secondary timing chain. Refer to «Secondary Camshaft Intermediate Drive Chain Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Remove the fuel pump. Refer to «Fuel Pump Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions__fuel-pump-replacement) .
4. Remove the generator. Refer to «Generator Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
5. Remove the catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
6. Remove the oil level indicator tube. Refer to «Oil Level Indicator Tube Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
7. Remove the ground wire bolt and wire from the cylinder head.
8. Remove the 2 front M8 left cylinder head bolts (1).
9. Remove the left cylinder head bolts (2).
10. Remove the left cylinder head (3).
11. Remove and discard the left cylinder head gasket (1).
12. Clean and inspect the cylinder head and the engine block sealing surfaces. Refer to «Cylinder Head Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) , and «Engine Block Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
13. Disassemble the cylinder head if needed. Refer to «Cylinder Head Disassemble (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__cylinder-head-disassemble-lf1-lfw-or) .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW left cylinder head gasket (1) using the deck face locating pins for retention.
3. Align the left cylinder head (3) with the deck face locating pins.
4. Place the left cylinder head in position on the deck face.
5. Install the NEW M11 cylinder head bolts (1). Tighten the M11 cylinder head bolts a first pass in sequence to 30 N.m (22 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 150 degrees using the EN-45059 meter.
6. Install the 2 NEW front M8 left cylinder head bolts (2). Tighten the M8 cylinder head bolts a first pass to 15 N.m (11 lb ft). Tighten the M8 cylinder head bolts a second pass in sequence an additional 75 degrees using the EN-45059 meter.
7. Install the left bank secondary timing chain. Refer to «Secondary Camshaft Intermediate Drive Chain Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
8. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-left-side) .
9. Install the fuel pump. Refer to «Fuel Pump Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions__fuel-pump-replacement) .
10. Install the generator. Refer to «Generator Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
11. Install the exhaust manifold. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
12. Install the oil level indicator tube. Refer to «Oil Level Indicator Tube Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Cylinder Head Replacement - Right Side (LF1, LFW or LFX)

Special Tools

EN-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Remove the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .
2. Remove the fuel feed pipe. Refer to «Fuel Feed Pipe Replacement (With AWD at Tank)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Fuel Feed Pipe Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
3. Remove the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
4. Remove the right bank secondary timing chain. Refer to «Secondary Camshaft Intermediate Drive Chain Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
5. Remove the catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LFX-Rear)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
6. Remove the right cylinder head bolts (1).
7. Remove the right cylinder head (2).
8. Remove and discard the cylinder head gasket (1).
9. Clean and inspect the cylinder head and the engine block sealing surfaces. Refer to «Cylinder Head Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) , and «Engine Block Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
10. Disassemble the cylinder head if needed. Refer to «Cylinder Head Disassemble (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__cylinder-head-disassemble-lf1-lfw-or) .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW right cylinder head gasket (1) using the deck face locating pins for retention.
3. Align the right cylinder head (2) with the deck face locating pins.
4. Place the right cylinder head in position on the deck face.
5. Install the NEW M11 cylinder head bolts (1). Tighten the M11 cylinder head bolts a first pass in sequence to 30 N.m (22 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 150 degrees using the EN-45059 meter.
6. Install the NEW M8 cylinder head bolt (2). Tighten the M8 cylinder head bolt a first pass to 15 N.m (11 lb ft). Tighten the M8 cylinder head bolt a second pass an additional 75 degrees using the EN-45059 meter.
7. Install the right bank secondary timing chain. Refer to «Secondary Camshaft Intermediate Drive Chain Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
8. Install the catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LFX-Rear)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
9. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
10. Install the fuel feed pipe. Refer to «Fuel Feed Pipe Replacement (With AWD at Tank)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) , «Fuel Feed Pipe Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
11. Install the camshaft cover. Refer to «Camshaft Cover Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__camshaft-cover-replacement-right-side) .

1. Remove the transmission. Refer to «Transmission Replacement (FWD)»(/buick/lacrosse/ii-2009-2013/remont/automatic-trans/#automatic-transmission-6t70-repair-instructions-on-vehicle) , «Transmission Replacement (AWD)»(/buick/lacrosse/ii-2009-2013/remont/automatic-trans/#automatic-transmission-6t70-repair-instructions-on-vehicle) .
2. Remove the flywheel. Refer to «Engine Flywheel Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-flywheel-removal)
3. Clean and inspect the flywheel. Refer to «Engine Flywheel Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) . If the flywheel teeth are damaged, inspect the starter for proper operation. Replace the starter if you find excessive wear or damage to the starter drive.

1. Install the flywheel. Refer to «Engine Flywheel Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__engine-flywheel-installation)
2. Install the transmission. Refer to «Transmission Replacement (FWD)»(/buick/lacrosse/ii-2009-2013/remont/automatic-trans/#automatic-transmission-6t70-repair-instructions-on-vehicle) , «Transmission Replacement (AWD)»(/buick/lacrosse/ii-2009-2013/remont/automatic-trans/#automatic-transmission-6t70-repair-instructions-on-vehicle) .

1. Remove the engine flywheel. Refer to «Engine Flywheel Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the oil pan. Refer to «Oil Pan Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__oil-pan-replacement) .
3. Remove the crankshaft rear oil seal and housing. Refer to «Crankshaft Rear Oil Seal and Housing Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__crankshaft-rear-oil-seal-and-housing) .

1. Install the crankshaft rear oil seal and housing. Refer to «Crankshaft Rear Oil Seal and Housing Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__crankshaft-rear-oil-seal-and-housing) .
2. Install the oil pan. Refer to «Oil Pan Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__oil-pan-replacement) .
3. Install the engine flywheel. Refer to «Engine Flywheel Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

1. Remove the primary timing chain. Refer to «Primary Camshaft Drive Chain and Sprockets Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
2. Remove the crankshaft sprocket. Refer to «Crankshaft Sprocket Removal»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) .
3. Remove the oil pump bolts and the oil pump.

1. Install the oil pump and bolts. Refer to «Oil Pump Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__oil-pump-installation)
2. Install the crankshaft sprocket. Refer to «Crankshaft Sprocket Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__crankshaft-sprocket-installation) .
3. Install the primary timing chain. Refer to «Primary Camshaft Drive Chain and Sprockets Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Oil Pan Replacement

Special Tools

EN-46109 Guide Pin Set

For equivalent regional tools, refer to Special Tools .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Drain the engine oil and remove the oil filter. Refer to «Engine Oil and Oil Filter Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Remove the catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
4. Remove the air conditioning (A/C) compressor bolts and reposition. DO NOT discharge the A/C system. Support the A/C compressor. Refer to «Air Conditioning Compressor Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
5. Remove the front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
6. Remove the oil pan to transmission bolts.
7. Remove the oil pan bolts.
8. Remove the oil pan.
9. Clean the oil pan and the engine block gasket surface. Refer to «Oil Pan Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__oil-pan-cleaning-and-inspection) .

1. Install the 8 mm (0.315 in) guides from the EN-46109 set into the center oil pan rail bolt hole on each side of the engine block.
2. Place a 3 mm (0.118 in) bead (1) of RTV sealant, on the block pan rail and the crankshaft rear oil seal housing.
3. Position the oil pan onto the block.
4. Remove the EN-46109 set 8 mm (0.315 in) guides from the engine block.
5. Loosely install the oil pan bolts.
6. Tighten the oil pan bolts in sequence. The 8 mm bolts (1-11) to 25 N.m (18 lb ft). The 6 mm bolts (12, 13) to 10 N.m (89 lb in).
7. Install engine front cover. Refer to «Engine Front Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__engine-front-cover-replacement) .
8. Reposition the air conditioning (A/C) compressor and install the bolts. Refer to «Air Conditioning Compressor Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
9. Install the catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
10. Lower the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
11. Refill the engine oil. Refer to «Engine Oil and Oil Filter Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .

Scheme 97

Engine Oil Pressure Sensor and/or Switch Replacement

1. Remove the oil pan. Refer to «Oil Pan Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__oil-pan-replacement) .
2. Remove the oil pan scraper bolts.
3. Remove the oil pan scraper.
4. Remove the oil suction pipe bolts.
5. Remove the oil suction pipe.
6. Remove the oil suction tube seal from the oil suction tube. Discard the oil suction tube seal.

1. Install a NEW oil suction tube seal onto the oil suction tube. DO NOT reuse the old oil suction tube seal.
2. Install the oil suction pipe.
3. Install the oil suction pipe bolts and tighten to 10 N.m (89 lb in).
4. Install the oil pan scraper.
5. Install the oil pan scraper bolts and tighten to 10 N.m (89 lb in).
6. Install the oil pan. Refer to «Oil Pan Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle__oil-pan-replacement) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
4. Drain the engine oil. Refer to «Engine Oil and Oil Filter Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
5. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
6. Remove the hood. Refer to «Hood Replacement»(/buick/lacrosse/ii-2009-2013/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
7. Remove the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
8. Disconnect the front knock sensor (KS).
9. Disconnect the rear KS (1) and the crank sensor. Refer to «Crankshaft Position Sensor Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
10. Re-position the plastic wire loom/shield on each valve cover, then disconnect the camshaft position (CMP) sensor (1-8).
11. Disconnect the manifold absolute pressure (MAP) sensor (1).
12. Disconnect the evaporative emission (EVAP) canister purge solenoid (2).
13. Disconnect the front and rear ignition coils (2).
14. Disconnect the A/C compressor (1).
15. Disconnect the coolant temperature sensor (1).
16. Disconnect the following electrical connectors: The heated oxygen sensor HO2S The electronic throttle control Unclip harness as necessary and lay harnesses off to the side.
17. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
18. Remove the catalytic converters. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , and «Catalytic Converter Replacement - Right Side (LFX-Rear)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
19. Remove the engine wiring harness grounds and negative cable from the cylinder head.
20. Remove the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
21. Remove the torque converter bolts.
22. Remove the air conditioning (A/C) compressor. DO NOT discharge the A/C system. Support the compressor. Refer to «Air Conditioning Compressor Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
23. Remove the power steering pump and position aside. Refer to «Power Steering Pump Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
24. Remove the transaxle to oil pan brace bolts and brace (FWD). If equipped with (AWD), remove the transfer case bracket and unbolt transfer case from the engine and set aside.
25. Remove the lower transaxle-to-engine bolts (1).
26. Unbolt intermediate shaft support frame engine block rotate support away from block leaving intermediate shaft and axle in place (FWD) only.
27. Remove the radiator outlet hose from the engine. Refer to «Radiator Outlet Hose Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
28. Remove the engine coolant thermostat housing from the engine. Refer to «Engine Coolant Thermostat Housing Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
29. Remove the vacuum hoses from the upper intake manifold.
30. Remove the radiator inlet hose from the engine. Refer to «Radiator Inlet Hose Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
31. Install the engine lifting device to the engine.
32. Remove the upper transaxle-to-engine bolts.
33. Remove the engine from the vehicle.
34. Remove the flywheel. Refer to «Engine Flywheel Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
35. Install the engine to the engine stand.
36. Disconnect electrical connectors as needed.
37. Transfer parts as needed.

1. Remove the engine from the engine stand.
2. Install the flywheel. Refer to «Engine Flywheel Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
3. Install the engine to the vehicle.
4. Install the upper transaxle-to-engine bolts (1) and tighten to 75 N.m (55 lb ft).
5. Remove the engine lifting device.
6. Install the radiator inlet hose to the engine. Refer to «Radiator Inlet Hose Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Install the battery ground to the rear of engine.
8. Install the fuel lines to the fuel rail.
9. Install the brake booster vacuum hose to the upper intake manifold.
10. Install the vacuum hoses to the upper intake manifold.
11. Install the engine coolant thermostat housing to the engine. Refer to «Engine Coolant Thermostat Housing Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
12. Raise the vehicle and remove the transaxle support.
13. Install the radiator outlet hose to the engine. Refer to «Radiator Outlet Hose Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
14. Install the lower transaxle-to-engine bolt (6) and the stud (1) and tighten to 75 N.m (55 lb ft).
15. Position the transaxle to oil pan brace and install the bolts. Tighten the bolts to 50 N.m (37 lb ft).
16. If equipped with AWD, install the transfer case bracket and bolt (1, 2)
17. Tighten the support bracket fasteners (1) to 5 N.m (44 lb in). Tighten the support bracket to engine fasteners (2) to 60 N.m (44 lb ft). Tighten the support bracket fasteners (1) to 60 N.m (44 lb ft).
18. Install the engine mount. Refer to «Engine Mount Replacement - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
19. Install the torque converter bolts.
20. Install the power steering pump. Refer to «Power Steering Pump Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/manual-power-steering/#power-steering-system) .
21. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
22. Install the starter motor. Refer to «Starter Replacement (V6)»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
23. Install the torque converter covers.
24. Install the engine wiring harness grounds to the transaxle.
25. Install the engine wiring harness ground nut to the transaxle stud. Tighten the nut to 35 N.m (26 lb ft).
26. Install the catalytic converters. Refer to «Catalytic Converter Replacement - Left Side (LFX-Front)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , and «Catalytic Converter Replacement - Right Side (LFX-Rear)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
27. Lower the vehicle.
28. Connect the following electrical connectors: The body wiring harness-to-engine harness The electronic throttle control The EGR valve The HO2S
29. Connect the coolant temperature sensor (1).
30. Connect the A/C compressor (1).
31. Connect the front and rear ignition coils (2).
32. Connect the EVAP canister purge solenoid (2).
33. Connect the MAP sensor (1).
34. Connect the CMP sensor (1-8), then re-position the plastic wire loom/shield on each valve cover.
35. Connect the rear KS (1).
36. Connect the front KS (2) and the crank sensor. Refer to «Crankshaft Position Sensor Replacement»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
37. Install the drive belt. Refer to «Drive Belt Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
38. Install the hood. Refer to «Hood Replacement»(/buick/lacrosse/ii-2009-2013/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
39. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement (LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-36l-repair-instructions) .
40. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/lacrosse/ii-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system-except-hybrid) .
41. Fill the crankcase with engine oil. Refer to «Engine Oil and Oil Filter Replacement (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
42. Fill cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) , «Cooling System Draining and Filling (GE 47716)»(/buick/lacrosse/ii-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
43. Perform a crankshaft position system variation learn procedure.
44. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle) .
45. Inspect for leaks.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Place a drain pan under the oil pan drain plug.
3. Remove the oil pan drain plug. Allow the oil to drain completely.
4. Install the oil pan drain plug and tighten to 25 N.m (18 lb ft).
5. Place the drain pan under the oil filter (1).
6. Remove the oil filter. Allow the oil to drain completely.

1. Lubricate the NEW oil filter gasket with clean engine oil.
2. Tighten the oil filter (1) to 25 N.m (18 lb ft).
3. Lower the vehicle.
4. Refill the engine oil. Refer to «Approximate Fluid Capacities»(/buick/lacrosse/ii-2009-2013/remont/lubrication-system/#maintenance-and-lubrication__approximate-fluid-capacities) .
5. Start the engine and inspect for leaks.

See also:
• Fastener Caution
• Special Tools
• Air Inlet Grille Panel Replacement
• Air Cleaner Assembly Replacement (LFW or LFX)
• Engine Coolant Air Bleed Pipe Replacement (V6)
• Generator Replacement (V6)
• Front Wheelhouse Front Liner Replacement
• Power Steering Fluid Reservoir Bracket Replacement (V6)
• Camshaft Cover Cleaning and Inspection
• Cooling System Draining and Filling (Static Fill)
• Cooling System Draining and Filling (GE 47716)
• Engine Front Cover Removal
• Engine Front Cover Disassemble
• Engine Front Cover Cleaning and Inspection
• Engine Front Cover Assemble
• Engine Front Cover Installation
• Secondary Timing Chain Tensioner Removal - Right Side
• Secondary Camshaft Drive Chain Shoe Removal - Right Side
• Secondary Timing Chain Guide Removal - Right Side
• Primary Camshaft Intermediate Drive Chain Tensioner Removal
• Primary Timing Chain Guide Removal - Upper
• Timing Chain Idler Sprocket Removal - Right Side
• Secondary Camshaft Intermediate Drive Chain Installation - Left Side
• Timing Chain Idler Sprocket Installation - Left Side
• Secondary Timing Chain Guide Installation - Left Side
• Secondary Camshaft Drive Chain Shoe Installation - Left Side
• Secondary Timing Chain Tensioner Installation - Left Side
• Primary Camshaft Intermediate Drive Chain Installation
• Primary Timing Chain Guide Installation - Upper
• Timing Chain Alignment Diagram
• Torque Reaction Against Timing Drive Chain Caution
• Fuel Pump Replacement
• Camshaft Removal - Left Side
• Camshaft Installation - Left Side
• Camshaft Position Actuator Installation - Left Side Intake
• Camshaft Removal - Right Side
• Camshaft Installation - Right Side
• Camshaft Position Actuator Installation - Right Side Intake
• Camshaft Cleaning and Inspection
• Valve Lifter Cleaning and Inspection
• Valve Rocker Arm Cleaning and Inspection
• Valve Lifter Installation - Right Side
• Valve Rocker Arm Installation - Right Side
• Catalytic Converter Replacement - Left Side (LFX-Front)
• Cylinder Head Disassemble (LF1, LFW or LFX)
• Transmission Replacement (FWD)
• Engine Flywheel Removal
• Engine Flywheel Installation
• Crankshaft Rear Oil Seal and Housing Removal
• Oil Pump Installation
• Crankshaft Sprocket Installation
• Lifting and Jacking the Vehicle
• Air Conditioning Compressor Replacement (V6)
• Oil Pan Cleaning and Inspection
• Component Fastener Tightening Caution
• Hood Replacement
• Hot Exhaust System Warning
• Approximate Fluid Capacities
• Engine Mount Bracket Replacement - Right Side
• Engine Support Fixture
• Crankshaft Balancer Replacement
• Camshaft Cover Replacement - Left Side
• Camshaft Cover Replacement - Right Side
• Engine Front Cover Replacement
• Setting Camshaft Timing
• Camshaft Position Actuator Replacement - Bank 2
• Camshaft Replacement - Left Side
• Oil Pan Replacement