Valve Clearance Adjustment (VIN Z)

This engine can be equipped with two different rocker arm stud configurations that require different valve lash procedures.

If your engine has screw-in rocker arm studs with positive stop shoulders, no valve adjustment is necessary. When the valve train requires service, you simply tighten the rocker arm nuts to 20 ft. lbs. (27 N.m)

If your engine has pressed-in rocker arm studs, you must follow the valve adjustment procedure outlined below.

1. Rotate engine until No. 1 piston is on TDC of compression stroke. Loosen rocker arm adjusting nut until lash is present.
2. Tighten adjusting nut until lash is removed. Tighten adjusting nut one full turn. Adjust remaining valves (for piston at TDC) as listed in the VALVE CLEARANCE ADJUSTMENT  table.
3. Rotate crankshaft 360 degrees to bring No. 4 piston to TDC of compression stroke. Adjust remaining valves. See the VALVE CLEARANCE ADJUSTMENT  table.