Chapter IV Disassembly & Repair
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cover is fixed.
b) Remove the carbon deposition in valve guide with
valve guide rimer before measuring the inner diameter of
valve guide.
Replace the guide if the inner diameter is less or more
than the maintenance limit.
Replace:
a) Freeze the valve guide to be replaced.
in freezing chamber for about 1 h.
b) Disassemble the valve guide from the combustor side
with a valve guide remover.
Be careful not to damage the cylinder head when disassembling
The valve guide.
c) Assemble the new valve guide from the valve spring side
of cylinder head.
Exhaust valve side: tap the exhaust valve guide until the
retainer ring contacts with cylinder head completely.
Inlet valve side: tap the inlet valve guide until it reaches
specified height (measure from the top of inlet valve guide
to the surface of cylinder)
d) check whether the there are damages on guide after
assembling and replace the valve guide in case of
damages.
Trim:
Finish ream with reamer on valve guide must be
conducted at room temperature so as to achieve good effect.
a) Coat a layer of cutting oil on valve reamer and guide.
Screw the reamer clockwise until it is screwed in valve
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