ION L4-2.4L (2007)
27. Inspect the bore of the tensioner body for dirt, debris, and damage. If any damage appears, replace the tensioner. Clean dirt or debris with a lint
free cloth.
28. Install the compressed piston assembly back into the timing chain tensioner body until the assembly 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, the assembly
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 27.1 thorough 27.4.
30. Ensure that all dirt and debris are removed from the timing chain tensioner threaded hole in the cylinder head.
31. Install the timing chain tensioner.
Tighten the tensioner to 75 N.m (66 lb ft).
32. The timing chain tensioner is released by compressing the tensioner 2 mm (0.079 in) which will release the locking mechanism in the ratchet. To
release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the
cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.
33. Apply sealant GM PN 12345382 (Canadian PN 10953489) or equivalent, to the threads and install the timing chain guide bolt access hole plug.
Tighten the plug to 90 N.m (59 lb ft).
34. Install the engine front cover.
35. Install the camshaft cover.