Cobalt L4-2.2L (2008)
27. Inspect the bore of the tensioner body for dirt, debris, and damage. If any damage appears, replace the tensioner. Clean dirt or debris out with a
lint-free cloth.
28. Install the compressed piston assembly back into the timing chain tensioner body until it stops at the bottom of the bore. Do not compress the
piston assembly against the bottom of the bore. If the piston assembly is compressed against the bottom of the bore, it will activate the tensioner,
which will then need to be reset again.
29. At this point the tensioner should measure approximately 72 mm (2.83 in) (a) from end to end. If the tensioner does not read 72 mm (2.83 in) (a)
from end to end repeat steps 26.1 through 26.4.
30. Install the timing chain tensioner.
Tighten the timing chain tensioner to 75 N.m (55 lb ft).
31. Use a suitable tool with a rubber tip on the end. Feed the tool down through the camshaft drive chain to rest on the timing chain. Then give a sharp
jolt diagonally downwards to release the tensioner.
32. Use a 24 mm wrench to hold the camshaft.
Tighten the NEW camshaft bolts to 85 N.m (63 lb ft) plus 30 degrees.
33. Install the camshaft cover. Refer to Camshaft Cover Replacement (See: Cylinder Head Assembly/Valve Cover/Service and Repair) .
34. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
35. Install the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover/Service and Repair) .
36. Lower the vehicle.
37. Connect negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
