● After cutting the valve seat, apply lapping compound to
the valve face, and insert the valve with a valve guide
reamer.
NOTE
·Do not excessively press and turn the valve to set it as it
may cause damage. Gently strike and set the valve.
·The seat surface may become worn on one side if the
valve is set in the same position. Turn the valve slightly
when setting it.
·Take precautions not to allow compound to get into the
clearance between the stem and guide while the valve
is being set.
CYLINDER HEAD ASSEMBLY
● Install new stem seals.
NOTE
·Replace the stem seals with new ones whenever a stem
seal is removed.
● Lubricate each valve stem with molybdenum disulfide
grease and insert the valve into the valve guide.
CAUTION
·Turning a valve too fast can damage the stem seals.
● Install the spring seats, valve springs and retainers.
NOTE
·For valve spring with varying pitch, install the valve
springs with the narrow pitch end facing down.
● Compress the valve springs with the valve spring
compressor and install the valve cotters.
CAUTION
·Compressing the valve spring more than necessary
when installing the valve cotters may cause loss of
valve spring tension.
TOOL : VALVE SPRING COMPRESSOR
9-11
CYLINDER HEAD / VALVES
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