Valve Clearance: Adjustments

NOTE: Valves should be adjusted cold, when the cylinder head temperature is less than 38° C (100° F). Adjustment procedure is the same for intake and exhaust valves. Loosen locknut and turn adjustment screw until feeler gauge slides back and forth with slight amount of drag. Tighten locknut and check clearance again. Repeat adjustment if necessary.




1. Remove valve cover.
2. Set No. 1 piston at TDC. "UP" mark in pulley should be at top, and TDC grooves on back side of pulley should align with cylinder head surface. The distributor rotor must be pointing towards No. 1 plug wire.
3. Adjust valves on No. 1 cylinder.

Valve Clearance:
Intake and Auxiliary: 0.12-0.17 mm (O.OO5-O.OO7 in.)
Exhaust: O.25-O.3O mm (0.010-0.012 in.)




4. Rotate crankshaft 180° counterclockwise (cam pulley turns 90°). TDC groove should be aligned with the indentation in the belt cover. "UP" mark should not be visible. Distributor rotor should point to No. 3 plug wire. Adjust valves on No. 3 cylinder.




5. Rotate crankshaft 180° counterclockwise to bring No. 4 piston to TDC. Both TDC grooves are once again visible and distributor rotor points to No. 4 plug wire. Adjust valves on No. 4 cylinder.




6. Rotate crankshaft 180° counterclockwise to bring No. 2 piston to TDC. Mark on pulley should align with indentation on the belt cover. "UP" mark should be visible. Distributor rotor should point to No. 2 plug wire. Adjust valves on No. 2 cylinder.