Tools Required

J 5825-A Crankshaft Sprocket Remover

1. Disconnect the battery negative cable assembly from the battery negative terminal. Refer to

   Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

   in General Information.
2. Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement in Engine Cooling
3. Remove the air cleaner assembly and intake duct.
4. Remove the grille. Refer to Radiator Grille in Sheet Metal.
5. Remove the air conditioning condenser. Refer to Condenser in Heater, Ventilation, and Air Conditioning.
6. Remove the engine front cover. Refer to Engine Front Cover Replacement .
7. Remove the intake manifold. Refer to Intake Manifold Replacement .
8. Remove the pushrods and valve lifters. Refer to Valve Rocker Arm and Push Rod Replacement .



9. Align the timing marks.
10. Remove the crankshaft position sensor reluctor ring.
11. Remove the camshaft sprocket bolts.
12. Remove the camshaft sprocket and timing chain. The sprocket is a light interference fit on the camshaft. Tap the sprocket on its lower edge to loosen it.



13. Remove the crankshaft sprocket (if required). Use the J 5825-A .
14. Remove the camshaft retainer plate and bolts.



15. Remove the camshaft using the following procedure:

15.1.

Install two or three 5/16-18 bolts x 100-125 mm (4-5 in) long into the camshaft threaded holes. Use these bolts to handle the camshaft.

15.2.

Pull the camshaft from the block. Use care to prevent damage to the camshaft bearings.

16. For cleaning, inspection, and repair, refer to Camshaft Bearing Removal and Installation .

Tools Required

J 5590 Crankshaft Sprocket Installer

1. Coat the camshaft lobes and journals with a high viscosity oil containing zinc GM P/N 1052367 or equivalent.



2. Install two or three 5/16-18 bolts 100-125 mm (4-5 in) long into the camshaft threaded holes. Use these bolts to handle the camshaft.
3. Install the camshaft to the engine. Handle the camshaft carefully to prevent damage to the camshaft bearings.
4. Install the camshaft retainer plate and bolts.



5. Install the crankshaft sprocket (if removed). Use the J 5590 . Make sure the timing mark faces outside.

Important: Line up the timing marks on the camshaft sprocket and crankshaft sprocket.




6. Install the camshaft sprocket and timing chain.
7. Install the camshaft sprocket bolts.

Tighten
Tighten the bolts to 28 N·m (21 lb ft).

8. Install the crankshaft position sensor reluctor ring. Refer to Camshaft Bearing Removal and Installation

Important: Replace all valve lifters, change the engine oil and filter, and add High Viscosity Oil containing zinc GM P/N 1051396 or the equivalent when a new camshaft is installed.

9. Install the valve lifter and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
10. Adjust the valves. Refer to Valve Lash Adjustment .
11. Install the intake manifold. Refer to Intake Manifold Replacement .
12. Install the engine front cover. Refer to Engine Front Cover Replacement .
13. Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .
14. Install the radiator. Refer to Radiator in Engine Cooling.
15. Install the A/C condenser, if equipped. Refer to Condenser in Heater, Ventilation, and Air Conditioning.
16. Install the grille. Refer to Radiator Grille in Sheet Metal.
17. Install the coolant reservoir. Refer to Camshaft Bearing Removal and Installation .
18. Install the air cleaner assembly and intake duct.
19. Connect the battery negative cable assembly to the battery negative terminal.

Tighten
Tighten the bolt to 15 N·m (11 lb ft).

20. Fill the cooling system with the proper quantity and grade of coolant. Refer to Draining and Filling Cooling System in Engine Cooling.