Engine Mechanical - 3.6l (ly7) (Repair Instructions - 4 of 5) Buick LaCrosse I

Cleaning Procedure

1. Remove the old gasket material from the water pump sealing surfaces.
2. Clean all excess dirt and debris from the water pump housing.

Inspection Procedure

1. Rotate the water pump hub (1). The water pump hub and impeller should turn straight and smoothly. If the hub wobbles, is noisy, or feels rough when rotated, replace the water pump.
2. Inspect the exterior of the water pump for the following: Damage to the water pump hub bolt threads (2) for the water pump pulley Damage to the water pump bolt holes (3)
3. Examine the water pump shaft (1) and the weep hole (2) in the water pump body for signs of leakage. If coolant leakage is evident, replace the water pump.
4. Inspect the interior of the water pump for the following: Damage to the water pump gasket sealing surface (1) Damage, corrosion or restrictions to the water pump impeller (2) Damage, corrosion or restrictions to the coolant passages (3)
5. Repair or replace the water pump as necessary.

Tools Required

1. J 42385-700 High Feature Thread Repair Kit. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 42385-2000 Thread Insert Kit. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. J 43965 Thread Repair Extension Kit. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type insert. During the insert installation process, the installation driver tool cold-rolls the bottom internal threads and expands the bottom external threads of the insert into the base material. This action mechanically locks the insert into place.

Scheme 136

The drill bit and counter bore tool from the tool kit J 42385-700 and J 42385-2000 is designed for use with either a suitable tap wrench or drill motor. See Special Tools . Limited access and larger hole repair may process better using a tap wrench. An extension from kit J 43965 may also be necessary to drive the thread repair tooling dependent on access to the hole being repaired. See Special Tools . Use only a tap wrench when tapping the hole and during installation of the insert.

Scheme 137

It is critical that the drilling, counterboring and tapping of the hole to be repaired follows the same centerline as the original hole.

Scheme 138

During the drilling and tapping of the hole being repaired ensure the tooling is consistently machining perpendicular to the surface of the base material.

Scheme 139

If the threaded hole being repaired has a base surface perpendicular to the hole centerline, tapping guides are available to aid in tapping the hole.

Thread Repair

Scheme 140

When installed to the proper depth, the flange (1) of the insert will be seated against the counterbore of the drilled/tapped hole and just below the surface (2) of the base material.

1. Drill out the threads of the damaged hole. Specifications: M6 inserts require a minimum drill depth of 15 mm (0.59 in). M8 inserts require a minimum drill depth of 20 mm (0.79 in). M10 inserts require a minimum drill depth of 23.5 mm (0.93 in).
2. Using compressed air, clean out any chips.
3. Counterbore the drilled hole to the full depth permitted by the tool (1).
4. Using compressed air, clean out any chips.
5. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only. Specifications: M6 inserts require a minimum tap depth of 15 mm (0.59 in). M8 inserts require a minimum tap depth of 20 mm (0.79 in). M10 inserts require a minimum tap depth of 23.5 mm (0.93 in).
6. Using compressed air, clean out any chips.
7. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
8. Using compressed air, clean out any chips.
9. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
10. Install the insert (2) onto the driver installation tool (1).
11. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2).
12. Install the insert (2) into the tapped hole by hand only.
13. Install the insert until the flange (2) of the insert contacts the counterbored surface.
14. Continue to rotate the driver installation tool (1) through the insert (2).
15. Inspect the insert for proper installation into the tapped hole. A properly installed insert (1) will be either flush or slightly below flush with the surface of the base material (2).
16. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Scheme 141

When installed to the proper depth, the flange of the insert (1) will be seated against the counterbore (2) of the drilled/tapped hole.

1. Install a stop collar (2) on the counterbore drill (1), if required.
2. Drill out the threads of the damaged hole.
3. Using compressed air, clean out any chips.
4. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
5. Using compressed air, clean out any chips.
6. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
7. Using compressed air, clean out any chips.
8. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
9. Install the insert (2) onto the driver installation tool (1).
10. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2).
11. Install the insert (2) into the tapped hole by hand only.
12. Install the insert until the flange (2) of the insert contacts the counterbored surface.
13. Continue to rotate the driver installation tool (1) through the insert (2).
14. Inspect the insert (1) for proper installation (2) into the tapped hole.
15. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Tapered Pipe Thread Repair

The thread repair insert for tapered pipe threads is coated with a clear silver zinc coating.

Scheme 142

When installed to the proper depth, the flange (1) of the insert will be seated against surface (2) of the base material of the drilled/tapped hole.

1. Drill out the threads of the damaged hole.
2. Using compressed air, clean out any chips.
3. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
4. Tap the drilled hole until the threads at the top of the tap (2) are down to the surface of the base material.
5. Using compressed air, clean out any chips.
6. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
7. Using compressed air, clean out any chips.
8. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
9. Install the insert (2) onto the driver installation tool (1).
10. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2).
11. Install the insert (2) into the tapped hole by hand only.
12. Install the insert until the flange (2) of the insert contacts the surface of the base material.
13. Continue to rotate the driver installation tool (1) until the top of the threaded section (2) is level with the top of the insert (3).
14. Inspect the insert (1) for proper installation (2) into the tapped hole.
15. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Scheme 143

The cylinder head bolt hole thread repair tooling are in the kits J 42385-2000 and J 42385-700 . See Special Tools . The cylinder head bolt hole thread repair components consist of the following

1. Drill (1) J 42385-723
2. Tap (2) J 42385-724
3. Installation driver (3) J 42385-725
4. Alignment pin (4) J 42385-303
5. Bushing (5) J 42385-302
6. Bolts (6) J 42385-733
7. Fixture plate (7) J 42385-401

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

1. Position the fixture plate (3) with the bushing (1) installed over the cylinder head bolt hole to be repaired (4).
2. Loosely install the fixture plate bolts (2) into the remaining cylinder head bolt holes.
3. Position the alignment pin (1) through the bushing and into the cylinder head bolt hole.
4. With the alignment pin in the desired cylinder head bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the cylinder head bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the cylinder head bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Remove the fixture plate bolts (2).
11. Remove the fixture plate (3) and bushing (1).
12. Using compressed air, clean out any chips.
13. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
14. Using compressed air, clean out any chips.
15. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
16. Install the insert (2) onto the driver installation tool (1).
17. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277®; or equivalent (1) to the insert OD threads (2).
18. Install the insert and installation driver (1) into the tapped hole by hand only.
19. Start the insert into the threaded hole.
20. Install the insert until the flange of the insert contacts the counterbored surface.
21. Continue to rotate the driver installation tool through the insert.
22. In order to completely form the new threads in the insert, rotate the driver installation tool through the insert until the mark (1) on the driver installation tool aligns with the surface of the engine block deck (2).
23. Inspect the insert for proper installation into the tapped hole.

Scheme 144

The crankshaft main bearing bolt hole thread repair tooling are in the kits J 42385-2000 and J 42385-700 . See Special Tools . The crankshaft main bearing bolt hole thread repair components consist of the following

1. Drill (1) for outboard holes J 42385-702
2. Tap (2) for outboard holes J 42385-703
3. Installation driver (3) for outboard holes J 42385-704
4. Bushing (4) for outboard holes J 42385-726
5. Alignment pin (5) for outboard holes J 42385-727
6. Bolts (6) for outboard holes J 42385-728
7. Drill (7) for inboard holes J 42385-720
8. Tap (8) for inboard holes J 42385-721
9. Installation driver (9) for inboard holes J 42385-722
10. Bushing (10) J 42385-713
11. Alignment pin (11) J 42385-308
12. Bolts (12) J 42385-734
13. Fixture plate (13) J 42385-712

Outboard Bolt Holes

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

1. Position the fixture plate (3) with the bushing (2) installed over the crankshaft main cap bolt hole to be repaired.
2. Loosely install the fixture plate bolts (1) into the remaining crankshaft main cap bolt holes.
3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Using compressed air, clean out any chips.
11. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
12. Using compressed air, clean out any chips.
13. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
14. Install the insert (2) onto the driver installation tool (1).
15. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277®, or equivalent (1) to the insert OD threads (2).
16. Install the insert and installation driver into the tapped hole by hand only.
17. Start the insert into the threaded hole.
18. Install the insert until the flange of the insert contacts the counterbored surface.
19. Continue to rotate the driver installation tool through the insert.
20. Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
21. Inspect the insert for proper installation into the tapped hole.
22. Remove the fixture plate bolts (1).
23. Remove the fixture plate (3) and bushing (2).

Inboard Bolt Holes

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

1. Position the fixture plate (3) with the bushing (1) installed over the crankshaft main cap bolt hole to be repaired.
2. Loosely install the fixture plate bolts (2) into the remaining crankshaft main cap bolt holes.
3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Using compressed air, clean out any chips.
11. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
12. Using compressed air, clean out any chips.
13. Lubricate the threads of the driver installation tool (2) with the driver oil (1) J 42385-110.
14. Install the insert (2) onto the driver installation tool (1).
15. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277®, or equivalent (1) to the insert OD threads (2).
16. Install the insert and installation driver into the tapped hole by hand only.
17. Start the insert into the threaded hole.
18. Install the insert until the flange of the insert contacts the counterbored surface.
19. Continue to rotate the driver installation tool through the insert.
20. Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
21. Inspect the insert for proper installation into the tapped hole.
22. Remove the fixture plate bolts (2).
23. Remove the fixture plate (3) and bushing (1).

Service Prior to Assembly

1. Dirt will cause premature wear of the rebuilt engine. Clean all the components.
2. Use the proper tools to measure the components when checking for excessive wear. Components not within the manufacturer's specification must be repaired or replaced.
3. When the components are reinstalled into an engine, return the components to their original location, position, and direction.
4. During assembly, lubricate all the moving parts with clean engine oil (unless otherwise specified). This will provide initial lubrication when the engine is first started.

Engine Block Assemble

1. Install the cylinder block-to-cylinder head alignment dowels.
2. Install the NEW front oil gallery expansion plug.
3. Ensure the NEW front oil gallery expansion plug is installed to the proper depth.
4. Install the cylinder block-to-transmission alignment dowels.
5. Apply the RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent on the NEW coolant expansion plugs.
6. Install the NEW coolant expansion plugs.
7. Ensure the NEW coolant expansion plugs are installed to the proper depth.
8. Apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent on the threads of the M20 left side oil gallery threaded plug.
9. Install the M20 left side oil gallery threaded plug. Tighten: Tighten the M20 left side oil gallery threaded plug to 31 N.m (23 lb ft).
10. Apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent on the threads of the M14 left side coolant drain threaded plug.
11. Install the M14 left side coolant drain threaded plug. Tighten: Tighten the M14 left side coolant drain threaded plug to 31 N.m (23 lb ft).
12. Apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent on the threads of the M14 rear oil gallery threaded plug.
13. Install the M14 rear oil gallery threaded plug. Tighten: Tighten the M14 rear oil gallery threaded plug to 31 N.m (23 lb ft).
14. Apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent on the threads of the M14 right side coolant drain threaded plug.
15. Install the M14 right side coolant drain threaded plug. Tighten: Tighten the M14 right side coolant drain threaded plug to 31 N.m (23 lb ft).
16. Apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent on the threads of the M14 right side oil gallery threaded plug.
17. Install the M14 right side oil gallery threaded plug. Tighten: Tighten the M14 right side oil gallery threaded plug to 31 N.m (23 lb ft).
18. Install the cylinder block-to-oil pan alignment dowels.
19. Install the NEW right front oil pan rail oil gallery expansion plug.
20. Ensure the NEW right front oil pan rail oil gallery expansion plug is installed to the proper depth.
21. Install the oil jets.
22. Install the oil jet bolts. Tighten: Tighten the oil jet bolts to 10 N.m (89 lb in).

1. J 6125-1B Slide Hammer Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 41818 Crankshaft Bearing Cap Remover. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Crankshaft Bearing Installation Procedure

1. Clean the crankcase crank bore with a lint-free cloth.
2. Clean all the oil from the backside of new bearing halves.
3. Install the new upper crankshaft bearings into position. The thrust bearing belongs in the number 3 journal. Ensure that the upper bearing insert contains the oil transfer hole and groove. Roll the bearing into position so that the lock tang engages the crank slot. The bearing must fit flush with the upper crankcase.
4. Install the new lower crankshaft bearings into position in the main bearing caps. The lower crankshaft bearings are identified by NO grooves or holes. The bearings must fit flush with the crankshaft bearing caps.

Crankshaft Installation Procedure

1. If removed, install the crankshaft sprocket drive pin. Lightly tap the pin in place with a small soft face, bronze/plastic, hammer until it bottoms in the hole.
2. Gently lower the crankshaft into position in the cylinder block.

Scheme 145

1. Place a length of fresh, room temperature plastic gaging material all the way across all the crankshaft bearing journals.
2. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
3. Install the crankshaft main bearing caps.
4. Loosely install the original inner main cap bolts.
5. Loosely install the original outer main cap bolts.
6. Loosely install the original short/inner side main cap bolts.
7. Loosely install the original long/outer side main cap bolts.
8. Tap the crankshaft main bearing caps with a soft-faced hammer.
9. Tighten the main caps bolts using the J 45059 in the following sequence: See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . NOTE: Refer to «Fastener Notice»(/buick/lacrosse/i-2004-2009/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices. Tighten the inboard bolts (1-8). Tighten: Tighten the inboard bolts to 20 N.m (15 lb ft) plus 80 degrees.
10. Tighten the outboard bolts (9-16). Tighten: Tighten the outboard bolts to 15 N.m (11 lb ft) plus 110 degrees.
11. Tighten the short/inner bolts (17-20). Tighten: Tighten the short/inner bolts to 30 N.m (22 lb ft) plus 60 degrees.
12. Tighten the long/outer bolts (21-24). Tighten: Tighten the long/outer bolts to 30 N.m (22 lb ft) plus 60 degrees.
13. After reaching final torque, allow the assembly to sit for 2 minutes.
14. Remove the crankshaft bearing cap side bolts.
15. Remove the crankshaft bearing cap outer bolts.
16. Remove the crankshaft bearing cap inner bolts.
17. Remove the crankshaft bearing caps using the J 6125-1B and J 41818 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
18. Determine the crankshaft bearing clearance by comparing the width of the flattened plastic gaging material at its widest point with the graduation on the gaging material container.
19. Compare your measurements with the «Engine Mechanical Specifications»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__engine-mechanical-specifications) . If the new bearings do not provide the proper crankshaft to bearing clearance, inspect the following: Re-measure the crankshaft journals for the correct specified size and ensure the proper new bearings are being installed. If the crankshaft journals are incorrectly sized, replace or regrind the crankshaft. Crankshaft machining is permitted and undersized bearings are available. Re-measure the engine block crankshaft bearing bore diameter to ensure proper size. The engine block crankshaft bearing bore is not machinable and the block must be replaced if out of specification.
20. Clean the plastic gaging material from the crankshaft bearing journals with a soft, lint-free cloth.
21. Lift the crankshaft out of the cylinder block.
22. Apply a liberal amount of crankshaft prelube GM P/N 1052367 (Canadian P/N 992869) or clean engine oil GM P/N 12345501 (Canadian P/N 992704) to the upper and lower bearing surfaces.
23. Gently lower the crankshaft into position in the cylinder block.
24. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
25. Install the crankshaft main bearing caps.
26. Loosely install the original inner main cap bolts.
27. Loosely install the NEW outer main cap bolts.
28. Tap the crankshaft main bearing caps with a soft-faced hammer.
29. Loosely install the NEW short/inner side main cap bolts.
30. Loosely install the NEW long/outer side main cap bolts.
31. Tighten the main cap bolts using the J 45059 in the following sequence: See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Tighten the inboard bolts (1-8). Tighten: Tighten the inboard bolts to 20 N.m (15 lb ft) plus 80 degrees.
32. Tighten the outboard bolts (9-16). Tighten: Tighten the outboard bolts to 15 N.m (11 lb ft) plus 110 degrees.
33. Tighten the short/inner bolts (17-20). Tighten: Tighten the short/inner bolts to 30 N.m (22 lb ft) plus 60 degrees.
34. Tighten the long/outer bolts (21-24). Tighten: Tighten the long/outer bolts to 30 N.m (22 lb ft) plus 60 degrees.
35. Ensure that the crankshaft turns without binding or noise.

1. EN 46111 Crankshaft Rotation Socket. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN 46121 Connecting Rod Guide Pin Set. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. J 8037 Ring Compressor. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
4. J 43690 Rod Bearing Clearance Checking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
5. J 43690-100 Rod Bearing Clearance Checking Tool - Adapter Kit. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
6. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Piston and Connecting Rod Assembly Procedure

1. Liberally lubricate the cylinder walls, piston rings and piston skirts with engine oil.
2. Select the correctly numbered piston/connecting rod assembly for the cylinder. A dot (1) showing proper piston orientation is located on the top of the piston.
3. Install the connecting rod bearing into the connecting rod.
4. Install the EN 46121 into the connecting rod bolt holes. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
5. Compress the piston rings using the J 8037 or equivalent. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
6. Using both hands, slowly guide the piston and connecting rod assembly into the cylinder from the top and bottom of the cylinder. DO NOT allow the connecting rod to contact the cylinder wall.
7. When the J 8037 contacts the deck surface, gently tap the piston into the cylinder using the handle end of a dead-blow hammer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Guide the connecting rod onto the crankshaft bearing journal using the EN 46121 while gently tapping the piston into the cylinder with a soft-blow hammer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
8. Remove the EN 46121 from the connecting rod bolt holes. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Connecting Rod Bearing Clearance Measurement Procedure - Using Plastic Gaging

1. Place a length of fresh, room temperature plastic gaging material all the way across the connecting rod bearing journal.
2. Install the connecting rod bearing into the connecting rod cap.
3. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
4. Install the connecting rod bolts into the connecting rod cap. Tighten: Tighten the connecting rod bolts to 30 N.m (22 lb ft).
5. Loosen the connecting rod bolts until the torque reading is zero.
6. Re-tighten the connecting rod bolts. First Pass Tighten: Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten: Tighten the connecting rod bolts an additional 110 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
7. Allow the assembly to sit for at least 2 minutes.
8. Remove the connecting rod cap bolts.
9. Remove the connecting rod cap.
10. Determine the connecting rod bearing clearance by comparing the width of the flattened plastic gaging material at its widest point with the graduation on the gaging material container.
11. Compare your measurements with the engine mechanical specifications. If the new bearings do not provide the proper crankshaft to connecting rod bearing clearance, inspect the following: Re-measure the crankshaft connecting rod journals for the correct specified size and ensure the proper new bearings are being installed. If the crankshaft connecting rod journals are incorrectly sized, replace or regrind the crankshaft. Crankshaft machining is permitted and undersized bearings are available. Re-measure the connecting rod bearing bore diameter to ensure proper size. The connecting rod is not machinable and the connecting rod must be replaced if out of specification.
12. Clean the plastic gaging material from the connecting rod bearing journals using a soft lint-free cloth.

Connecting Rod Bearing Clearance Measurement Procedure - Using J 43690 and J 43690-100

The J 43690 and the J 43690-100 have been developed as a more accurate method to measure connecting rod bearing clearances. See Special Tools . The instructions below provide an overview of tool set-up and usage. For more detailed information, refer to the tool instruction sheets as supplied by the tool manufacturer.

Scheme 146

J 43690 Rod Bearing Clearance Checking Tool. See Special Tools .

1. J 43690-20 Swivel Base (1)
2. J 43690-19 Dial Indicator (2)
3. J 43690-2 Base (3)
4. J 43690-5, -6 Handle (4)
5. J 43690-10, -11 Foot (5)
6. 280307 Screw (6)
7. J 43690-1 Pivot Arm Assembly (7)
8. J 43690-3, -7, -8 Screws (8)
9. 280319 Screw (9)
10. 280311 Screw (10)
11. J 43690-17, -18 Adapter (11)
12. 280310 Pin (12)

Scheme 147

J 43690-100 Rod Bearing Clearance Tool - Adapter Kit. See Special Tools .

1. J 43690-104 Spacer (1)
2. J 43690-105 Retainer Plate (2)
3. 505478 Bolt (3)
4. 511341 Bolt (4)
5. J 43690-106 Retainer Plate (5)
6. J 43690-107 Cap (6)
7. J 43690-102 Foot (7)
8. J 43690-101 Pivot Arm Assembly (8)
9. J 43690-103 Adapter (9)
10. 505439 Adapter (10)

1. Install the connecting rod bearing into the connecting rod cap.
2. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
3. Install the connecting rod bolts into the connecting rod cap. Tighten: Tighten the connecting rod bolts to 30 N.m (22 lb ft).
4. Loosen the connecting rod bolts until the torque reading is zero.
5. Re-tighten the connecting rod bolts. First Pass Tighten: Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten: Tighten the connecting rod bolts an additional 110 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
6. Rotate the crankshaft until the crankshaft journal and the connecting rod to be measured is in the 12 o'clock position.
7. Remove the crankshaft main bolts required to install the retainer plate J 43690-105.
8. Install the J 43690-105 and crankshaft main bolts.
9. Loosen the connecting rod bolts until the torque reading is zero.
10. Re-tighten the connecting rod bolts. First Pass Tighten: Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten: Tighten the connecting rod bolts an additional 110 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
11. During and after installation, ensure each piston is positioned properly in the correct cylinder. The locating arrow on the top of each piston must be pointing toward the front of the engine.
12. Repeat these procedures for the remaining piston/connecting rod assemblies using the EN 46111 in order to rotate the crankshaft. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Connecting Rod Final Assembly Procedure

1. Guide the connecting rod away from the crankshaft connecting rod journal in order to lubricate the crankshaft connecting rod bearing journal.
2. Apply a liberal amount of crankshaft prelube GM P/N 1052367 (Canadian P/N 992869) or clean engine oil GM P/N 12345501 (Canadian P/N 992704) to the crankshaft connecting rod bearing journal.
3. Guide the connecting rod to the crankshaft connecting rod journal.
4. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
5. Install the NEW connecting rod bolts into the connecting rod cap. Tighten: Tighten the NEW connecting rod bolts to 30 N.m (22 lb ft).
6. Loosen the connecting rod bolts until the torque reading is zero.
7. Re-tighten the connecting rod bolts. First Pass Tighten: Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten: Tighten the connecting rod bolts an additional 110 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
8. During and after installation, ensure each piston is positioned properly in the correct cylinder. The locating arrow on the top of each piston (1) must be pointing toward the front of the engine.
9. Repeat these procedures for the remaining piston/connecting rod assemblies using the EN 46111 in order to rotate the crankshaft. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. EN 46109 Guide Pin Set. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN-47839 Crankshaft Rear Oil Seal Installation Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. J 42183 Handle. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Installation Procedure

1. Install the 6 mm (0.236 in) guides from the EN 46109 into the 2 crankshaft rear oil seal housing corner bolt holes of the engine block. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. Install the EN-47839 with the J 42183 (1, 2) onto the rear of the crankshaft flange. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. Place a 3 mm (0.118 in) bead of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, to the NEW crankshaft rear oil seal housing as shown (1).
4. Install the crankshaft rear oil seal housing to the engine block.
5. Remove the EN 46109 6 mm (0. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .236 in) guides from the engine block.
6. Install the crankshaft rear oil seal housing bolts. Tighten: Tighten the crankshaft rear oil seal housing bolts to 10 N.m (89 lb in).
7. Remove the EN-47839 and J 42183 (1, 2) from the crankshaft flange. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Oil Pump Installation

1. Align the oil pump generator with the crankshaft flats and install the oil pump to the engine block.
2. Align the pump body with the mounting holes in the cylinder block.
3. Install the oil pump bolts. Tighten: Tighten the oil pump bolts to 23 N.m (17 lb ft).

EN 46109 Guide Pin Set. See Special Tools .

1. Install the 8 mm (0.315 in) guides from the EN 46109 into the center oil pan rail bolt hole on each side of the engine block. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. Place a 3 mm (0.118 in) bead (1) of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, 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 8 mm (0. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .315 in) guides from the engine block.
5. Loosely install the oil pan bolts.
6. Tighten the oil pan bolts in sequence shown. Tighten: Tighten the 8 mm bolts (1-11) to 23 N.m (17 lb ft). Tighten the 6 mm bolts (12, 13) to 10 N.m (89 lb in).

1. EN 46111 Crankshaft Rotation Socket. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW right cylinder head gasket using the deck face locating pins for retention.
3. Align the right cylinder head with the deck face locating pins.
4. Place the right cylinder head in position on the deck face.
5. Install new M11 cylinder head bolts. Tighten: Tighten the M11 cylinder head bolts a first pass in sequence to 45 N.m (33 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 120 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Valve Lifter Installation - Right

1. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil GM P/N 12378006 or equivalent. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
2. Lubricate the SHLA bores in the cylinder head with clean engine oil GM P/N 12378006 or equivalent.
3. Install the SHLAs in the cylinder head.
4. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the SHLA pivot spheres.

Valve Rocker Arm Installation - Right

1. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the pivot pocket (1), roller (2) and valve slot (3) areas of the camshaft followers.
2. Place the camshaft followers in position on the valve tip and stationary hydraulic lash adjuster (SHLA).
3. The rounded head end of the follower goes on the SHLA while the flat end goes on the valve tip.
4. Clean the camshaft journals and carriers with a clean, lint-free cloth.

EN 46111 Crankshaft Rotation Socket. See Special Tools .

1. Ensure that the crankshaft is in the stage one timing drive assembly position using the EN 46111 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) .
2. Ensure that the camshaft sealing rings (1) are in place in the camshaft grooves.
3. Select the proper camshaft for the particular installation location. The ring placement is defined as follows: The number 2 identification ring for the right exhaust camshaft is machined off (1). The number 3 identification ring for the right intake camshaft is machined off (2).
4. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft journals and the right cylinder head camshaft carriers.
5. Place the right intake and right exhaust camshafts in position in the right cylinder head.
6. Position the camshaft lobes in a neutral position with the flats on the back of the camshafts up and parallel (1) with the right cylinder head camshaft cover rail.
7. Observe the markings on the right cylinder head camshaft bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number 1, 3, 5 indicates the cylinder position from the front of the engine.
8. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft bearing caps.
9. Install the camshaft bearing thrust caps in the first journal of the right cylinder head.
10. Install the remaining bearing caps with their orientation mark toward the center of the cylinder head.
11. Hand start all the camshaft bearing cap bolts.
12. Tighten the camshaft bearing cap bolts in the sequence shown. Tighten: Tighten the camshaft bearing cap bolts in sequence to 10 N.m (89 lb in).
13. Loosen the center intake camshaft bearing cap bolts (1, 2) and the center exhaust camshaft bearing cap bolts (3, 4).
14. Retighten the center camshaft bearing cap bolts (1, 2, 3, 4). Tighten: Retighten the camshaft bearing cap bolts to 10 N.m (89 lb in).

1. EN 46111 Crankshaft Rotation Socket. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW left cylinder head gasket using the deck face locating pins for retention.
3. Align the left cylinder head with the deck face locating pins.
4. Place the left cylinder head in position on the deck face.
5. Install new M11 cylinder head bolts. Tighten: Tighten the M11 cylinder head bolts a first pass in sequence to 45 N.m (33 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 120 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
6. Install the 2 front M8 left cylinder head bolts. Tighten: 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 60 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Valve Lifter Installation - Left

1. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil GM P/N 12378006 or equivalent. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
2. Lubricate the SHLA bores in the cylinder head with clean engine oil GM P/N 12378006 or equivalent.
3. Install the SHLAs in the cylinder head.
4. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the SHLA pivot spheres.

Valve Rocker Arm Installation - Left

1. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the pivot pocket (1), roller (2) and valve slot (3) areas of the camshaft followers.
2. Place the camshaft followers in position on the valve tip and stationary hydraulic lash adjuster (SHLA).
3. The rounded head end of the follower goes on the SHLA while the flat end goes on the valve tip.
4. Clean the camshaft journals and carriers with a clean, lint-free cloth.

EN 46111 Crankshaft Rotation Socket. See Special Tools .

1. Ensure that the crankshaft is in the stage one timing drive assembly position using the EN 46111 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) .
2. Ensure that the camshaft sealing rings (1) are in place in the camshaft grooves.
3. Select the proper camshaft for the particular installation location. The ring placement is defined as follows: The number 4 identification ring for the left intake camshaft is machined off (1). The number 5 identification ring for the left exhaust camshaft is machined off (2).
4. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft journals and the left cylinder head camshaft carriers.
5. Place the left intake and left exhaust camshafts in position in the left cylinder head.
6. Position the camshaft lobes in a neutral position with the flats on the back of the camshafts up and parallel (1) with the left cylinder head camshaft cover rail.
7. Observe the markings on the left cylinder head camshaft bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number 2, 4, 6 indicates the cylinder position from the front of the engine.
8. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft bearing caps.
9. Install the camshaft bearing thrust cap in the first journal of the left cylinder head.
10. Install the remaining bearing caps with their orientation mark toward the center of the cylinder head.
11. Hand start all the camshaft bearing cap bolts.
12. Tighten the camshaft bearing cap bolts in the sequence shown. Tighten: Tighten the camshaft bearing cap bolts in sequence to 10 N.m (89 lb in).
13. Loosen the center intake camshaft bearing cap bolts 1, 2 and the center exhaust camshaft bearing cap bolts 3, 4.
14. Retighten the center camshaft bearing cap bolts 1, 2, 3, 4. Tighten: Retighten the camshaft bearing cap bolts to 10 N.m (89 lb in).

Camshaft Position (CMP) Actuator Installation - Right Intake

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "IN" marking (3). The marking is for an intake camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the "R" and triangle marking (2). The marking is for alignment to the highlighted timing chain link on the right side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Install the right intake camshaft position actuator.
5. Install the camshaft position actuator bolt. Tighten: Tighten the camshaft position actuator bolt to 58 N.m (43 lb ft).

Camshaft Position (CMP) Actuator Installation - Right Exhaust

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "EX" marking (1). The marking is for an exhaust camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the "R" and triangle marking (2). The marking is for alignment to the highlighted timing chain link on the right side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Install the right exhaust camshaft position actuator.
5. Install the camshaft position actuator bolt. Tighten: Tighten the camshaft position actuator bolt to 58 N.m (43 lb ft).

Camshaft Position (CMP) Actuator Installation - Left Intake

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "IN" marking (3). The marking is for an intake camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the "L" and circle marking (1). The marking is for alignment to the highlighted timing chain link on the left side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Install the left intake camshaft position actuator.
5. Install the camshaft position actuator bolt. Tighten: Tighten the camshaft position actuator bolt to 58 N.m (43 lb ft).

Camshaft Position (CMP) Actuator Installation - Left Exhaust

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "EX" marking (1). The marking is for an exhaust camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the "L" and circle marking (3). The marking is for alignment to the highlighted timing chain link on the left side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Install the left exhaust camshaft position actuator.
5. Install the camshaft position actuator bolt. Tighten: Tighten the camshaft position actuator bolt to 58 N.m (43 lb ft).

EN 46111 Crankshaft Rotation Socket. See Special Tools .

1. Ensure the crankshaft sprocket is installed with the timing mark (1) visible.
2. Install the crankshaft sprocket on to the nose of the crankshaft.
3. Align the notch in the crankshaft sprocket with the pin in the crankshaft.
4. Slide the crankshaft sprocket on the crankshaft nose until the crankshaft sprocket contacts the step in the crankshaft.
5. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN 46111 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) - Stage One.

Camshaft Intermediate Drive Chain Idler Installation - Left

1. Ensure that the left camshaft intermediate drive chain idler (2) is being installed. The recessed hub (3) and the larger sprocket of the left camshaft intermediate drive chain idler is installed outward. The raised hub and the smaller sprocket of the left camshaft intermediate drive chain idler is installed towards the block.
2. Place the left camshaft intermediate drive chain idler to the cylinder block.
3. Install the camshaft intermediate drive chain idler bolt. Tighten: Tighten the camshaft intermediate drive chain idler bolt to 58 N.m (43 lb ft).

1. EN 46105 Camshaft Holding Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN 46111 Crankshaft Rotation Socket. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Install the EN 46105-1 onto the rear of the left camshafts.
2. Ensure that the EN 46105-1 is fully seated onto the camshafts.
3. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN 46111 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) - Stage One.
4. Install the left secondary camshaft drive chain.
5. Place the left secondary camshaft drive chain around the inner sprocket of the left camshaft intermediate drive chain idler with the timing camshaft drive chain link (1) aligned to the alignment access hole (2) made in the left camshaft intermediate drive chain idler outer sprocket.
6. Wrap the secondary camshaft drive chain around both left actuator drive sprockets.
7. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.
8. Align the left exhaust camshaft position actuator sprocket alignment circle mark (2) with the timing camshaft drive chain link (1).
9. Align the left intake camshaft position actuator sprocket alignment circle mark (1) with the timing camshaft drive chain link (2).
10. There will be 18 links (1) between the left camshaft intermediate drive chain idler timing secondary camshaft drive chain link and each left camshaft position actuator sprocket timing secondary camshaft drive chain link.

Secondary Camshaft Drive Chain Guide Installation - Left

1. Ensure that the left secondary camshaft drive chain guide (2) is being installed.
2. Position the left secondary camshaft drive chain guide.
3. Install the secondary camshaft drive chain guide bolts. Tighten: Tighten the secondary camshaft drive chain guide bolts to 23 N.m (17 lb ft).

Secondary Camshaft Drive Chain Shoe Installation - Left

1. Ensure that the left secondary camshaft drive chain shoe (2) is being installed.
2. Position the left secondary camshaft drive chain shoe.
3. Install the secondary camshaft drive chain shoe bolt. Tighten: Tighten the secondary camshaft drive chain shoe bolt to 23 N.m (17 lb ft).

1. EN 46112 Tensioner Retraction Pins. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 45027 Tensioner Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Ensure that the left secondary camshaft drive chain tensioner (2) is being installed.
2. Using the J 45027 , reset the left secondary camshaft drive chain tensioner plunger. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. Install the plunger into the left secondary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the left secondary camshaft drive chain tensioner by inserting the EN 46112 into the access hole in the side of the left secondary camshaft drive chain tensioner body. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
5. Slowly release pressure on the left secondary camshaft drive chain tensioner. The left secondary camshaft drive chain tensioner should remain compressed.
6. Install a NEW left secondary camshaft drive chain tensioner gasket to the left secondary camshaft drive chain tensioner.
7. Install the left secondary camshaft drive chain tensioner bolts through the left secondary camshaft drive chain tensioner and gasket.
8. Ensure the left secondary camshaft drive chain tensioner mounting surface on the left cylinder head does not have any burrs or defects that would degrade the sealing of the NEW left secondary camshaft drive chain tensioner gasket.
9. Place the left secondary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the left secondary camshaft drive chain tensioner gasket tab (1). First Pass Tighten: Tighten the left secondary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten: Tighten the left secondary camshaft drive chain tensioner bolts to 23 N.m (17 lb ft).
11. Release the left secondary camshaft drive chain tensioner by pulling out the EN 46112 and unlocking the tensioner plunger. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
12. Verify the left secondary camshaft drive chain timing mark alignments (1-6). Also refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) - Stage One.

Camshaft Intermediate Drive Chain Idler Installation - Right

1. Ensure that the right camshaft intermediate drive chain idler (1) is being installed. The recessed hub (4) and the smaller sprocket of the right camshaft intermediate drive chain idler is installed outward. The raised hub and the larger sprocket of the right camshaft intermediate drive chain idler is installed towards the block.
2. Install the right camshaft intermediate drive chain idler.
3. Install the camshaft intermediate drive chain idler bolt. Tighten: Tighten the camshaft intermediate drive chain idler bolt to 58 N.m (43 lb ft).

Primary Camshaft Drive Chain Installation

1. Install the primary camshaft drive chain.
2. Wrap the primary camshaft drive chain around the large sprockets of each camshaft intermediate drive chain idler and the crankshaft sprocket.
3. The left camshaft intermediate drive chain idler timing mark (1) will align with a timing camshaft drive chain link (2).
4. The right camshaft intermediate drive chain idler timing mark (2) will align with a timing camshaft drive chain link (1).
5. The crankshaft sprocket timing mark (2) will align with a timing camshaft drive chain link (1).
6. Ensure all the timing marks (2, 3, 6) are properly aligned with the timing camshaft drive chain links (1, 4, 5).

Primary Camshaft Drive Chain Guide Installation - Lower

1. Position the primary camshaft drive chain lower guide to the oil pump.
2. Install the primary camshaft drive chain lower guide bolts. Tighten: Tighten the primary camshaft drive chain lower guide bolts to 23 N.m (17 lb ft).

Primary Camshaft Drive Chain Guide Installation - Upper

1. Ensure the upper primary camshaft drive chain guide (3) is being installed.
2. Install the upper primary camshaft drive chain guides.
3. Install the upper primary camshaft drive chain guide bolts. Tighten: Tighten the upper primary camshaft drive chain guide bolts to 23 N.m (17 lb ft).

1. EN 46105 Camshaft Locking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN 46111 Crankshaft Rotation Socket. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. EN 46112 Tensioner Retraction Pins. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
4. J 45027 Tensioner Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Ensure that the primary camshaft drive chain tensioner (3) is being installed.
2. Using the J 45027 , reset the primary camshaft drive chain tensioner plunger. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. Install the plunger into the primary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the primary camshaft drive chain tensioner by inserting the EN 46112 into the access hole in the side of the primary camshaft drive chain tensioner body. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
5. Slowly release pressure on the primary camshaft drive chain tensioner. The primary camshaft drive chain tensioner should remain compressed.
6. Install a NEW primary camshaft drive chain tensioner gasket to the primary camshaft drive chain tensioner.
7. Install the primary camshaft drive chain tensioner bolts through the primary camshaft drive chain tensioner and gasket.
8. Ensure the primary camshaft drive chain tensioner mounting surface on the engine block does not have any burrs or defects that would degrade the sealing of the NEW primary camshaft drive chain tensioner gasket.
9. Place the primary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the primary camshaft drive chain tensioner gasket tab (1). First Pass Tighten: Tighten the primary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten: Tighten the primary camshaft drive chain tensioner bolts to 23 N.m (17 lb ft).
11. Release the primary camshaft drive chain tensioner by pulling out the EN 46112 and unlocking the tensioner plunger. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
12. Verify the primary and left secondary camshaft drive chain timing mark alignments (1-12). Also refer to «Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) - Stage One.
13. Remove the EN 46105-1 from the rear of the left camshafts.
14. Using the EN 46111 , rotate the crankshaft and crankshaft sprocket from the stage 1 alignment position (1) to the stage 2 alignment position (2), 115 crankshaft degrees, in order to install the right secondary camshaft drive chain components. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
15. Install the EN 46105-2 onto the rear of the left camshafts.
16. Install the EN 46105-1 onto the rear of the right camshafts.

Secondary Camshaft Drive Chain Installation - Right

1. Ensure that the crankshaft is in the stage 2 timing drive assembly position (1).
2. Install the right secondary camshaft drive chain.
3. Place the secondary camshaft drive chain around the right camshaft intermediate drive chain idler outer sprocket, aligning the timing camshaft drive chain link (1) with the alignment access hole (2) made in the right camshaft intermediate drive chain idler inner sprocket.
4. Wrap the secondary camshaft drive chain around both right actuator drive sprockets.
5. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.
6. Align the right exhaust camshaft position actuator sprocket alignment triangle mark (1) with the timing camshaft drive chain link (2).
7. Align the right intake camshaft position actuator sprocket alignment triangle mark (2) with the timing camshaft drive chain link (1).
8. There will be 18 links (1) between the right camshaft intermediate drive chain idler timing camshaft drive chain link and each right camshaft position actuator sprocket timing camshaft drive chain link.

Secondary Camshaft Drive Chain Guide Installation - Right

1. Ensure that the right secondary camshaft drive chain guide (1) is being installed.
2. Position the right secondary camshaft drive chain guide.
3. Install the secondary camshaft drive chain guide bolts. Tighten: Tighten the secondary camshaft drive chain guide bolts to 23 N.m (17 lb ft).

Secondary Camshaft Drive Chain Shoe Installation - Right

1. Ensure that the right secondary camshaft drive chain shoe (1) is being installed.
2. Position the right secondary camshaft drive chain shoe.
3. Install the secondary camshaft drive chain shoe bolt. Tighten: Tighten the secondary camshaft drive chain shoe bolt to 23 N.m (17 lb ft).

1. EN 46112 Tensioner Retraction Pins. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 45027 Tensioner Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Ensure that the right secondary camshaft drive chain tensioner (1) is being installed.
2. Using the J 45027 reset the right secondary camshaft drive chain tensioner plunger.
3. Install the plunger into the right secondary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the right secondary camshaft drive chain tensioner by inserting the EN 46112 into the access hole in the side of the right secondary camshaft drive chain tensioner body.
5. Slowly release pressure on the right secondary camshaft drive chain tensioner. The right secondary camshaft drive chain tensioner should remain compressed.
6. Install a NEW right secondary camshaft drive chain tensioner gasket to the right secondary camshaft drive chain tensioner.
7. Install the right secondary camshaft drive chain tensioner bolts through the right secondary camshaft drive chain tensioner and gasket.
8. Ensure the right secondary camshaft drive chain tensioner mounting surface on the right cylinder head does not have any burrs or defects that would degrade the sealing of the NEW right secondary camshaft drive chain tensioner gasket.
9. Place the right secondary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the right secondary camshaft drive chain tensioner gasket tab (1). First Pass Tighten: Tighten the right secondary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten: Tighten the right secondary camshaft drive chain tensioner bolts to 23 N.m (17 lb ft).
11. Release the right camshaft drive chain tensioner by pulling out the EN 46112 and unlocking the tensioner plunger.
12. Verify all primary and secondary camshaft drive chain timing mark alignments (1-18) also refer to «CAMSHAFT TIMING DRIVE CHAIN ALIGNMENT DIAGRAM»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction) .

Tools Required

EN 46109 Guide Pin Set. See Special Tools .

1. Install the 8 mm (0.315 in) guide from the EN 46109 into the cylinder block positions as shown.
2. Install the NEW engine front cover to cylinder block seal.
3. Place a 3 mm (0.118 in) bead of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover as shown (1).
4. Place the engine front cover onto the EN 46109 and slide into position.
5. Remove the EN 46109 from the cylinder block.
6. Hand start all the front cover bolts.
7. Tighten the engine front cover bolts in the sequence shown. Tighten: Tighten the engine front cover bolts in sequence to 23 N.m (17 lb ft).
8. Install NEW O-rings on the camshaft position sensor.
9. Place the camshaft position sensors in position on the front cover.
10. Install the camshaft position sensor bolts. Tighten: Tighten the camshaft position sensor bolts to 10 N.m (89 lb in).
11. Place the camshaft position actuator valves in position on the front cover.
12. Install the camshaft position actuator valve bolts. Tighten: Tighten the camshaft position actuator valve bolts to 10 N.m (89 lb in).

EN 46104 Water Pump Pulley Holding Tool. See Special Tools .

1. Ensure that the engine front cover and water pump are clear of old gasket material.
2. Place a new water pump gasket on the water pump.
3. Place the water pump in position on the front cover.
4. Install the water pump bolts. Tighten: Tighten the water pump bolts in the sequence shown to 10 N.m (89 lb in).
5. Install the water pump pulley.
6. Loosely install the water pump pulley bolts.
7. Install the EN 46104 onto the water pump pulley. Tighten: Tighten the water pump pulley bolts to 10 N.m (89 lb in).

1. EN 46101 Spark Plug Tube Seal Guide. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN 46105 Camshaft Locking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Remove the EN 46105-2 from the rear of the left camshafts.
2. Install the EN 46101 onto the spark plug tubes of the left cylinder head.
3. Install the camshaft cover bolt grommets prior to installing the camshaft cover bolts.
4. Wipe the camshaft cover sealing surface on the left cylinder head with a clean, lint-free cloth.
5. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover split lines (1).
6. Place the left camshaft cover into position onto the left cylinder head.
7. Loosely install the left camshaft cover bolts.
8. Tighten the left camshaft cover bolts in the sequence shown. Tighten: Tighten the left camshaft cover bolts in the sequence to 10 N.m (89 lb in).
9. Remove the EN 46101 from the spark plug tubes of the left cylinder head.
10. Install the NEW spark plugs into the left cylinder head. Tighten: Tighten the spark plugs to 20 N.m (15 lb ft).
11. Install each ignition coil through the left camshaft cover into the spark plug tube taking care not to damage the spark plug and/or the seal in the left camshaft cover.
12. Install each ignition coil bolt. Tighten: Tighten the ignition coil bolt to 10 N.m (89 lb in).

1. EN 46101 Spark Plug Tube Seal Guide. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. EN 46105 Camshaft Locking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Remove the EN 46105-1 from the rear of the right camshafts.
2. Install the EN 46101 onto the spark plug tubes of the right cylinder head. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. Install the camshaft cover bolt grommets prior to installing the camshaft cover bolts.
4. Wipe the camshaft cover sealing surface on the right cylinder head with a clean, lint-free cloth.
5. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover split lines (1).
6. Place the right camshaft cover into position onto the right cylinder head.
7. Loosely install the right camshaft cover bolts.
8. Tighten the right camshaft cover bolts in the sequence shown. Tighten: Tighten the right camshaft cover bolts in the sequence to 10 N.m (89 lb in).
9. Remove the EN 46101 from the spark plug tubes of the right cylinder head. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
10. Install the NEW spark plugs into the right cylinder head. Tighten: Tighten the spark plugs to 20 N.m (15 lb ft).
11. Install each ignition coil through the right camshaft cover into the spark plug tube taking care not to damage the spark plug and/or the seal in the right camshaft cover.
12. Install each ignition coil bolt. Tighten: Tighten the ignition coil bolt to 10 N.m (89 lb in).

Intake Manifold Installation

1. Install the lower intake manifold gasket.
2. Install the intake manifold assembly.
3. Install the intake manifold bolts. Tighten: Tighten the intake manifold bolts to 23 N.m (17 lb ft).
4. Connect the fresh air positive crankcase ventilation (PCV) hose to the left camshaft cover fitting.
5. Connect the dirty air PCV hose to the intake manifold and the right camshaft cover fitting.
6. Install the evaporative (EVAP) solenoid.
7. Install the EVAP solenoid bolt. Tighten: Tighten the EVAP solenoid bolt to 10 N.m (89 lb in).
8. Connect and remove the intake manifold-to-solenoid EVAP hose to the intake manifold and to the EVAP solenoid.
9. Install the intake manifold-to-solenoid EVAP hose bracket bolt to the intake manifold. Tighten: Tighten the intake manifold-to-solenoid EVAP hose bracket bolt to 10 N.m (89 lb in).
10. Connect the vehicle-to-solenoid EVAP hose to the EVAP solenoid.
11. Install the hose clip to the intake manifold.
12. Connect the brake booster hose to the upper intake manifold.

1. EN 46106 Engine Flywheel Holding Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. Place the engine flywheel in position on the crankshaft.
2. Install 2 NEW bolts in location at the top and bottom of the engine flywheel bolt pattern allowing the engine flywheel to hang in position.
3. Install the EN 46106 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
4. Install the remaining NEW engine flywheel bolts. Tighten: Tighten the NEW engine flywheel bolts to 30 N.m (22 lb ft). Tighten the NEW engine flywheel bolts an additional 45 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. EN 46106 Engine Flywheel Holding Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. J 41998-B Crankshaft Balancer Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
3. J 45059 Angle Meter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

1. The EN 46106 must be installed onto the flywheel. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
2. Use the J 41998-B , nut, bearing and washer to install the crankshaft balancer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
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 in the crankshaft. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) . Ensure you engage at least 10 threads of the J 41998-B before pressing the crankshaft balancer in place. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
6. Push the crankshaft balancer into position by tightening the nut on the J 41998-B until the large washer bottoms out on the crankshaft end. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
7. Remove the J 41998-B . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
8. Install the crankshaft balancer bolt.
9. Tighten the crankshaft balancer bolt. Tighten: Tighten the crankshaft balancer bolt to 100 N.m (74 lb ft). Tighten the crankshaft balancer bolt an additional 150 degrees using the J 45059 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .
10. Remove the EN 46106 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/mechanical/#how-to-diagnosis-troubleshooting-the-engine-mechanical-36l-ly7-introduction__special-tools) .

Oil Filter Adapter Installation

1. Position the left knock sensor to the cylinder block as shown.
2. Install the knock sensor bolt. Tighten: Tighten the knock sensor bolt to 23 N.m (17 lb ft).
3. Ensure proper knock sensor orientation.
4. Position a NEW oil filter adapter gasket onto the oil filter adapter.
5. Install the oil filter adapter bolts into the oil filter adapter.
6. Install the oil filter adapter.
7. Tighten the oil filter adapter bolts into the engine block. Tighten: Tighten the oil filter adapter bolts to 23 N.m (17 lb ft).
8. Install a NEW oil filter.

Exhaust Manifold Installation - Left

1. Position a NEW exhaust manifold gasket onto the left exhaust manifold.
2. Install the exhaust manifold bolts into the left exhaust manifold.
3. Place the left exhaust manifold, exhaust manifold gasket and bolts as an assembly in position on the left cylinder head.
4. Install the exhaust manifold bolts into the left cylinder head. Tighten: Tighten the exhaust manifold bolts to 25 N.m (18 lb ft).
5. Install the engine coolant temperature (ECT) sensor. Tighten: Tighten the ECT sensor to 22 N.m (16 lb ft).
6. Install NEW O-rings on the crankshaft position sensor.
7. Place the left exhaust manifold heat shield in position.
8. Install the exhaust manifold heat shield bolts. Tighten: Tighten the exhaust manifold heat shield bolts to 10 N.m (89 lb in).
9. Install the left torque strut bracket.
10. Install the left torque strut bracket bolts. Tighten: Tighten the left torque strut bracket bolts to 50 N.m (37 lb ft).

Oil Level Indicator and Tube Installation

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

Exhaust Manifold Installation - Right

1. Install a NEW O-ring on the crankshaft position sensor, if damaged.
2. Position the crankshaft position sensor into the cylinder block.
3. Install the crankshaft position sensor bolt. Tighten: Tighten the crankshaft position sensor bolt to 10 N.m (89 lb in).
4. Position the right knock sensor to the cylinder block as shown.
5. Install the knock sensor bolt. Tighten: Tighten the knock sensor bolt to 23 N.m (17 lb ft).
6. Ensure proper knock sensor orientation.
7. Install the block heater cartridge, if equipped.
8. Position a NEW exhaust manifold gasket onto the right exhaust manifold.
9. Install the exhaust manifold bolts into the right exhaust manifold.
10. Place the right exhaust manifold, exhaust manifold gasket and bolts as an assembly in position on the right cylinder head.
11. Install the exhaust manifold bolts into the right cylinder head. Tighten: Tighten the exhaust manifold bolts to 25 N.m (18 lb ft).
12. Place the right exhaust manifold heat shield in position.
13. Install the exhaust manifold heat shield bolts. Tighten: Tighten the exhaust manifold heat shield bolts to 10 N.m (89 lb in).

Thermostat Housing Installation

1. Install a NEW gasket onto the thermostat housing.
2. Install the thermostat housing.
3. Install the thermostat housing bolts. Tighten: Tighten the thermostat housing bolts to 10 N.m (89 lb in).
4. Install a NEW gasket and O-ring onto the heater inlet/outlet pipe assembly.
5. Install the heater inlet/outlet pipe assembly.
6. Install the heater inlet/outlet pipe assembly bolts. Tighten: Tighten the heater inlet/outlet pipe assembly bolts to 10 N.m (89 lb in).

Water Outlet Installation

1. Install a NEW gasket and O-ring onto the water outlet.
2. Install the water outlet.
3. Install the water outlet bolts. Tighten: Tighten the water outlet bolts to 10 N.m (89 lb in).

Starter Motor Installation

1. Install the starter motor.
2. Install the starter motor bolts. Tighten: Tighten the starter motor bolts to 50 N.m (37 lb ft).

See also:
• Special Tools
• Safety Glasses Caution
• Fastener Notice
• Engine Mechanical Specifications
• Camshaft Timing Drive Chain Alignment Diagram (W/Primary Inverted Tooth (IT) Chain)
• Torque Reaction Against Timing Drive Chain Notice
• COMPONENT FASTENER TIGHTENING NOTICE