Valve Clearance: Adjustments

NOTE: Adjust the valves only when the cylinder head temperature is less then 100°F (38°C).

1. Remove the cylinder head cover.





2. Set the No. 1 piston at Top Dead Center (TDC). The "UP" mark (A) on the camshaft pulley should be at the top, and the TDC grooves (B) on the pulley should line up with the top edge of the head.





3. Select the correct thickness feeler gauge for the valves you're going to check.

Intake: 0.26 mm (0.010 inch) +/- 0.02 mm (0.0008 inch)
Exhaust: 0.30 mm (0.012 inch) +/- 0.02 mm (0.0008 inch)





4. Insert the feeler gauge (A) between the adjusting screw (B) and the end of the valve stem and slide it back and forth; you should feel a slight amount of drag.





5. If you feel too much or too little drag, loosen the locknut (A), and turn the adjusting screw (B) until the drag on the feeler gauge is correct.
6. Tighten the locknut and recheck the clearance. Repeat the adjustment if necessary.





7. Rotate the crankshaft 180° counterclockwise (the camshaft pulley turns only 90°). The "UP" mark (A) on the camshaft pulley should be toward the exhaust side of the head.
8. Check and, if necessary, adjust the valve clearance on No. 3 cylinder.





9. Rotate the crankshaft pulley 180° counterclockwise to bring No. 4 piston to TDC. Grooves (A) are visible again.
10. Check and, if necessary, adjust the valve clearance on No. 4 cylinder.





11. Rotate the crankshaft 180° counterclockwise to bring No. 2 piston to TDC. The "UP" mark (A) should be on the intake side of the head.
12. Check and, if necessary, adjust the valve clearance on No. 2 cylinder.
13. Install the cylinder head cover.