Valve Clearance

Reference Values
Valve: Valve clearance:
Intake valve 0.15-0.45 mm
Exhaust valve 0.35-0.60 mm

CAUTION: This is only the check value.

NOTE: Carry out this check with the engine at room temperature.

Make a note of the valve clearance on a form.

The valve clearance on a cold engine (approximately 20 degree C) should be:







Inlet valve: 0.20 ± 0.03 mm
Exhaust valve: 0.40 ± 0.03 mm

NOTE: The tolerances are less at setting. When checking the valve clearance through the plug hole the tolerances are larger.

Differences in valve clearance for different engines/ambient temperatures:
-0.01 mm at 15 degree C
+0.01 mm at 25 degree C
+0.02 mm at 30 degree C
+0.03 mm at 35 degree C
+0.04 mm at 45 degree C