MAINTENANCE MANUAL OF ENGINE
41
4.8 Adjusting the valve clearance
Tool:
Open-end wrench, flat-tip screwdriver, feeler gauge
Firing order for a 3-cylinder engine: 1-3-2
Valve clearance adjustment rule: When the piston of
cylinder 1 comes to the top dead center, valve
clearance can be adjusted for both the intake and
exhaust valves of cylinder 1, exhaust valve of cyl-
inder 3, and intake valve of cylinder 2.
Intake valve clearance 0.20
～
0.25 mm
Exhaust valve clearance 0.25
～
0.30mm
Adjusting steps:
Method for determining the top dead center of
cylinder 1
Rotate the crankshaft counter-clockwise until the
exhaust valve of cylinder 2 is about to open and the
intake valve of cylinder 3 is about to close, then the
piston of cylinder 1 comes to the top dead center.
Adjust the valve clearances in the sequence of 1-3-2,
and following the rule mentioned above.
Adjust the clearances of the intake and exhaust
valves of cylinder 1.
Adjust the clearance of exhaust valve of cylinder
3.
Adjust the clearance of intake valve of cylinder 2.
Then rotate the flywheel for one turn. Adjust the
clearance of intake valve of cylinder 3 and the
clearance of exhaust valve of cylinder 2.
Summary of Contents for KM/4L22
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