5.3. Adjustment of Valve Clearance
5.3.1. General information
The valve clearances are to be adjusted at the times of the following situations.
•
When the engine is overhauled and the cylinder heads are disassembled.
•
When severe noise comes from valve train.
•
When the engine is not normally operated, even though there is no trouble in the fuel system.
The valve clearance of the cold engine are as follows.
- Intake valves : 0.3 mm
- Exhaust valves : 0.3mm
5.3.2. Method of adjusting the valve clearance
1) Loosen the lock-nuts using a ring
spanner.
2) Insert a thickness gauge of 0.3mm
between valve stem and rocker arm
.
3) Turn the adjusting bolts using a
screw driver until the gauge can be
pulled out with some restriction.
4) After the adjustment fix the adjusting bolt
not to rotate and tighten the lock-nut at
the same time.
5) Measure the clearance one more time
and if necessary adjust again.
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