Notice: Perform TDC Offset Recovery procedure if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.

1. Disconnect the battery negative cables from the battery.Refer to Battery Cable Replacement in Engine Electrical.
2. Remove the engine cover from the vehicle. Refer to Engine Cover Replacement in Interior Trim.
3. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
4. Evacuate the air conditioning system. Refer to Refrigerant Recovery and Recharging in HVAC Systems with A/C-Manual.
5. Remove the surge tank from then vehicle. Refer to Surge Tank (Diesel) Replacement in Engine Cooling.
6. Remove the air cleaner assembly from the vehicle. Refer to Air Cleaner Assembly Replacement in Engine Controls.
7. Remove the air intake duct from the turbocharger.
8. Remove the grille from the vehicle.
9. Remove the air conditioning condenser from the vehicle.
10. Remove the radiator from the vehicle. Refer to Radiator Replacement in Engine Cooling.
11. Remove the cylinder heads from the engine block. Refer to Cylinder Head Replacement .
12. Remove the engine front cover from the engine block. Refer to Engine Front Cover Replacement .
13. Remove the oil pump drive from the engine block. Refer to Oil Pump Drive Replacement .
14. Remove the valve lifters from the engine block. Refer to Valve Lifter Replacement .
15. Remove the timing chain and camshaft sprocket from the engine block. Refer to Timing Chain and Sprocket Replacement .



16. Remove the thrust bearing and retainer from the engine block.



17. Remove the camshaft spacer from the engine block.



18. Remove the camshaft from the engine block, use care as not to damage the camshaft bearing.

Important: Whenever a new camshaft is installed, replace all valve lifters, engine oil, and oil filter.

Notice: Perform TDC Offset Recovery procedure if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.

1. Install the camshaft into the engine block.

•	Coat the camshaft lobes with camshaft and valve lifter Pre Lube GM P/N 1052365 or equivalent.

•	Lubricate the camshaft bearing journals with clean engine oil.




2. Install the spacer with the chamfer towards the camshaft.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the thrust plate and bearing.

Tighten
Tighten the bolts to 23 N·m (17 lb ft).

4. Install the timing chain and sprockets to the camshaft. Refer to Timing Chain and Sprocket Replacement .
5. Install the engine front cover to the engine block. Refer to Engine Front Cover Replacement .
6. Install the valve lifters into the engine block. Refer to Valve Lifter Replacement .
7. Install the cylinder heads to the engine block. Refer to Cylinder Head Replacement .
8. Install the oil pump drive to the engine block. Refer to Oil Pump Drive Replacement .
9. Install the radiator to the vehicle. Refer to Radiator Replacement in Engine Cooling.
10. Install the air conditioning condenser to the vehicle.
11. Install the radiator support to the vehicle.
12. Install the grille on the vehicle.



13. Install the air intake duct to the turbocharger.
14. Install the air cleaner assembly to the vehicle. Refer to Air Cleaner Assembly Replacement in Engine Controls-6.5L.
15. Install the surge tank to the vehicle. Refer to Surge Tank (Diesel) Replacement in Engine Cooling.
16. Connect the negative battery cables. Refer to Battery Cable Replacement in Engine Electrical.
17. Refill the cooling system. Refer to Cooling System Draining and Filling .
18. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging in HVAC Systems with A/C--Manual .
19. Perform TDC offset timing adjustment. Refer to TDC Offset Adjustment in Engine Controls-6.5L.