Cobalt L4-2.2L (2008)
Timing Chain: Service and Repair
Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Tools Required
J 45027 Tensioner Tool
Removal Procedure
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement (See: Cylinder Head Assembly/Valve Cover/Service and Repair) .
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove the No. 1 cylinder spark plug. Refer to Spark Plug Replacement .
4. Rotate the crankshaft in the engine rotational direction clockwise, until the No. 1 piston is at top dead center (TDC) on the compression stroke.
5. Remove the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover/Service and Repair) .
6. Lower the vehicle.
Important: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed. If not removed, the
timing chain will become cocked and it will be difficult to remove.
7. Remove the timing chain tensioner.
8. Remove the fixed timing chain guide access plug.
