Valve Clearance: Adjustments
Valve ClearanceADJUSTMENT
NOTE: Adjustment of the valve clearance should be performed while engine is cold.
1) Set the #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise using ST.
ST 499977100 CRANKSHAFT PULLEY WRENCH
NOTE: When arrow mark (A) on the camshaft sprocket (LH) comes exactly to the top, #1 cylinder piston is at the top dead center of compression stroke.
2) Adjust the #1 cylinder valve clearance.
1) Loosen the valve rocker nut and screw.
2) Place a suitable thickness gauge.
3) While noting the valve clearance, tighten the valve rocker adjust screw.
4) When specified valve clearance is obtained, tighten the valve rocker nut.
Tightening torque: 10 Nm (1.0 kgf-m, 7.2 ft. lbs.)
CAUTION:
^ Insert the thickness gauge as parallel as possible with respect to the valve stem end face.
^ Adjust the exhaust valve clearances while lifting up the vehicle.
Valve clearance
Intake; 0.20 ± 0.02 mm (0.0079 ± 0.0008 inch)
Exhaust; 0.25 ± 0.02 mm (0.0098 ± 0.0008 inch)
3) Ensure the valve clearances are within specifications.
4) Turn the crankshaft two complete rotations until #1 cylinder piston is set again to the top dead center on compression stroke.
5) Ensure the valve clearances are within specifications. If necessary, readjust the valve clearances.
6) Similar to adjustment procedures used for the #1 cylinder, adjust the #2, #3 and #4 cylinder valve clearances.
NOTE:
^ Be sure to set the cylinder pistons to their respective top dead centers on compression stroke before adjusting valve clearances.
^ To set the #3, #2 and #4 cylinder pistons to their top dead centers on compression stroke, turn the crankshaft pulley clockwise 90° at a time starting with arrow mark on camshaft sprocket (LH) facing up.