44
2. Inspect/service/repair:
1
Valve stem outside diameter
Inspect the valve stem outside diameter with
the micrometer, if finding out of the standard
or service limit, or if visually inspecting the
burn and damaged on the valve face, please
replace with new one.
Standard
Service limit
IN
5.440–5.455 mm
5.310 mm
EX
5.430–5.445 mm
5.300 mm
2
Valve spring free length
Measure the free length of the valve springs.
If out of the standard or service limit. Please
replace the spring.
Standard
Service limit
30.5 mm
28.5 mm
3
Valve Guide
Inspection:
a. Inspect the valve guide for smooth,
scratch and damaged in the inner sur-
face, and matching between the valve
guide and cylinder cover for fastness.
b. Using the valve guide reamer clean the
valve guides to remove any carbon
deposits before measuring.
If the valve guide inside diameter is lower
than standard or out of the service limit,
replace the guide.
Standard
Service limit
5.500–5.512 mm
5.562 mm
4-3 Engine
Valve guide
reamer
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