Skylark L4-144 2.4L DOHC VIN T SFI (1997)
12. Mark the crankshaft sprocket and the timing chain outer surface.
13. Remove the timing chain.
14. Clean the old sealant off of the bolt with a wire brush.
15. Clean the threaded hole in the camshaft with a round nylon bristle brush.
16. Inspect the parts for wear and replace the parts as necessary. Some scoring of the timing chain shoe and the guides is normal.
Installation
Installation
NOTE: GM does not provide timing marks, or information to perform timing chain service without the special tools shown in this procedure.
Tools Required:
J 39579 Camshaft Sprocket Wrench
J 36008-A Camshaft Sprocket Alignment Pins
Important: Ensure that the camshaft sprocket alignment pins are in the cylinder block and the timing chain housing, prior to installing the timing chain
housing. The camshaft sprocket alignment pins ensure proper chain housing and front cover location for correct front oil-seal-to-crankshaft alignment.
1. Install J 36008-A through holes in the camshaft sprockets and into holes in the timing chain housing. This will position the camshaft for correct
timing.
2. Use the following steps if the camshafts are out of position and must be rotated more than 1/8 turn to install the alignment dowel pins:
Notice: Failure to follow this procedure could result in severe engine damage.
a. The crankshaft must be rotated 90 degrees clockwise off of TDC to give the valves adequate clearance to open.
b. Once the camshafts are in position and the J 36008-A Camshaft Sprocket Alignment Pins are installed, rotate the crankshaft counter-clockwise
back to TDC.