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ENGINE
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NOTE
To ease guide removal, installation and to
maintain correct fit, heat the cylinder head to
100 °C (212 °F) in an oven.
a. Install the new valve guide using a valve guide
remover
①
and valve guide installer
②
.
b. After installing the valve guide, bore the
valve guide using a valve guide reamer
③
to obtain proper stem-to-guide clearance.
NOTE
After replacing the valve guide reface the
valve seat.
c. If the valve seat is to wide or narrow or
cracked, grind it to ensure impermeability.
3). Lap:
• al e face
• al e seat
NOTE
After reface the valve seat or replacing the
valve and valve guide, the valve seat and
valve face should be lapped.
a. If the pipe will be replaced, grind the valve
seat again.
CAUTION:
Do not let the compound enter the gap
between the valve stem and the guide.
b. Install the valve into the cylinder head.
c. Turn the valve until the valve face and valve
seat are evenly polished, then clean off all of
the compound.
NOTE
For best lapping results, lightly tap the valve
seat while rotating the valve back and forth
between your hands.
ENGINE
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d. Apply a fine lapping compound to the valve
face and repeat the above steps.
NOTE
After every lapping operation be sure to
clean off all of the compound from the valve
face and valve seat.
e. Install the valve into the cylinder head.
g. Press the valve through the valve guide and
onto the valve seat to make a clear pattern.
h. Measure the valve seat width again. If the
valve seat width is out of specification, reface
and relapse the valve seat.
3
、
INSTALL:
1). Apply:
• moly enum isulfi e oil
(onto the valve stem and valve stem seal)
2). Install:
• al e spring seats
• al e stem seals
• al es
• al e springs
• al e spring retainers
NOTE
Install the valve springs with the larger pitch
(a) facing upwards.
(b) Smaller pitch
• al e cotters
NOTE
Install the valve cotters while compressing
the valve spring with the valve spring
compressor
①
and valve spring compressor
attachment
②
.