For 1990-2009 cars only
Removal Procedure
- Disconnect the battery negative cable. Refer to Battery Cable Replacement
- Disconnect the PCV hose from the air cleaner outlet duct.
- Remove the air cleaner outlet duct from the throttle body and the air cleaner assembly. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls.
- Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
- Discharge the air condition system, if equipped. Refer to Refrigerant Recovery and Recharging in HVAC Systems with A/C - Manual.
- Remove the radiator. Refer to Radiator Replacement in Engine Cooling.
- Remove the A/C condenser, if equipped. Refer to Condenser Replacement in HVAC Systems with A/C - Manual.
- Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .
- Remove the intake manifold. Refer to Intake Manifold Replacement .
- Remove the valve lifters and the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
- Remove the engine front cover. Refer to Engine Front Cover Replacement .
- Remove the crankshaft position sensor reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement .
- Remove the timing chain and camshaft sprocket. Refer to Timing Chain and Sprocket Replacement .
- Remove the balance shaft drive gear.
- Remove the camshaft. Refer to Camshaft Removal .
Installation Procedure
- Install the camshaft into the engine block. Refer to Camshaft Installation .
- Install the balance shaft drive gear. Refer to Balance Shaft Installation for alignment of the balance shaft drive gear and the driven gear.
- Line up the timing marks on the camshaft sprocket and the crankshaft sprocket dot to dot. When these dots are lined up dot to dot, the number four cylinder is at the top dead center of its compression stroke.
- Install the camshaft timing chain and camshaft sprocket. Refer to Timing Chain and Sprocket Replacement .
- Install the crankshaft position sensor reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement .
- Install the valve lifters and the valve pushrods. Refer to Valve Lifter Replacement .
- Install the engine front cover. Refer to Engine Front Cover Replacement .
- Install the intake manifold. Refer to Intake Manifold Replacement .
- Rotate the engine to align the crankshaft balancer marks (1) and (4) with the front cover marks (2) and (3) for cylinder number one top dead center.
- Install the distributor. Refer to Distributor Installation in Engine Electrical.
- Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .
- Install the A/C condenser, if equipped. Refer to Condenser Replacement in HVAC Systems with A/C - Manual.
- Install the radiator. Refer to Radiator Replacement in Engine Cooling.
- Fill the cooling system with the proper grade and quantity of engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
- Recharge the air conditioning system, if equipped. Refer to Refrigerant Recovery and Recharging in HVAC Systems with A/C - Manual.
- Install the air cleaner outlet duct to the throttle body and the air cleaner assembly. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls.
- Connect the PCV hose to the air cleaner outlet duct.
- Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
Important: Whenever a new camshaft is installed, do the following procedures:
• Change the engine oil. • Change the engine oil filter. • Add GM Engine Oil Supplement GM P/N 1052367 or
the equivalent to the engine oil.
Notice: Failure to properly align the crankshaft position sensor reluctor ring may result in component damage and effect OBD II system performance.
Important: When the alignment marks on the camshaft sprocket and the crankshaft sprocket are aligned the engine is at cylinder number four top dead center.
