Measure the ID of every valve guide.
Usage limit: inlet/exhaust：4.532mm
Usage limit of clearance between valve and valve
guide pipe:
Inlet valve：0.07mm
Exhaust valve：0.08mm
Replacement of Valve Guide
Note: When the clearance between the valve and
valve guide pipe exceeds the usage limit, please
replace the valve guide. After the replacement of
valve guide, the surface of valve seat ring has to be
refinished.
Put the valve guide into a freezer to cool for one hour.
Heat the cylinder head to 212-302F with electric
furnace or hot oven.
Fix the cylinder head, use the valve guide removing
tools to remove the valve guide from the upper side
of the cylinder head.
Place a new O-ring on the new valve guide.
Install the valve guide from the top end of the cylinder
head.
Note: Do not damage the cylinder head when installing
the valve guides.
①：valve guide screwdriver
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