Service manual

ENGINE TOP END 5-31
Valves
Valve Clearance Inspe ction
•
Refer to the Valve Clearance Inspection in the Periodic
Maintenance chapter.
Valv e Clearance Adjustment
•
Refer to the Valve Clearance Adjustment in the Periodic
Maintenance chapter.
Va lve Remo val
•
Remove the cylinder head (see Cylinder Head Removal).
○
Mark and record the valve location so it can be installed
in the original position.
•
Using the valve spring compressor assembly, remove the
valve.
Special Tools - Valve Spring Compressor Assembly: 57001
-241 [A]
Valve Spring Compressor Adapter,
22:
57001-1202 [B]
Valve Installation
•
Replace the valve stem oil seal.
If a new valve is to be used, check the valve-to-guide
clearance (see Valve-to-Guide Clearance Measurement).
If there is too little clearance, ream the valve guide (see
Valve G uide Installation).
If there is too much clearance, install a new valve guide
(see Valve Guide Removal and Valve Guide Installation).
•
Check the valve seat (see Valve Seat Inspection).
•
Apply a thin coat of molybdenum disulfide grease to the
valve stem.
•
Install each spring so that the closed coil end faces down-
wards.
○
The green paint on the spring faces upwards.
Valve Stem [A]
Oil Seal [B]
Spring Seat [C]
Spring [D]
Retainer [E]
Split Keepers [F]
Closed Coil End [G]
Valve Guide Removal
•
Remove:
Valve (see Valve Removal)
Valve Stem Oil Seal
•
Hammer lightly on the valve guide arbor [A] to remove the
guide from the top of the head.
Special Tool - Valve Guide A rbor, 5: 57001-1203