1. Remove the rocker covers and gaskets.

2. Crank the engine untill the mark on the damper aligns with the TDC or 0 mark on the timing tab and the engine is in the No. 1 firing position. This can be determined by placing your finger on the No. 1 cylinder valves as the marks align. If the valves do not move, it is in the No. 1 firing position. If the valves do move, it is in the No.6 firing position (No. 4 on the V6) and the crankshaft should be rotated 1 more revolution to the No. 1 firing position. To adjust a valve, back off the adjusting nut untill lash (play) is felt at the pushrod. Tighten the nut just untill all lash is removed. This can be determined by rotating the pushrod with your fingers. When all lash is removed the pushrod will stop rotating. When all play is removed, tighten the nut 1 full turn (360 degrees).

3. With the engine in the No. 1 firing position, the following valves can be adjusted:
V6 ENGINES

5. Reinstall the rocker arm covers using new gaskets.