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ENGINE TOP E ND 5-21
Valves
Valve Clearance Inspection
•
Refer to the Engine Top End in the Periodic Maintenance
chapter.
Valve Removal
•
Remove the cylinder head (see Cylinder Head Removal).
•
Remove the valve lifter and shim.
○
Mark and record the valve lifter and shim locations so they
can be installed in their original positions.
•
Using the valve spring compressor assembly, remove the
valve.
Special Tools - Valve Spring Compressor Assembly:
57001–241 [A]
Adapter,
20: 57001–1154 [B]
Valve Installation
•
Replace the oil seal with a new one.
•
Apply a thin coat of molybdenum disulfide grease to the
valve stem before valve installation.
•
Install the springs so that the closed coil end faces down-
wards.
Valve Stem [A]
Oil Seal [B ]
Spring Seat [C]
Closed Coil End [D]
Valve Spring (White) [E]
Retainer [F]
Split Keepers [G]
Valve Guide Removal
•
Remove:
Valve(seeValveRemoval)
Oil S eal
Spring Seat
•
Heat the area around the valve guide to 120 ∼ 150°C (248
∼ 302°F), and hamm er lightly on the valve guide arbor [A]
to remove the guide from the top of the head.
CAUTION
Do not heat the cylinder head with a torch. This will
warp the cylinder head. Soak the cylinder head in
oil and heat the oil.
Special Tool - Valve Guide Arbor, 4: 57001–1273