1-S57
MX5100, WSM
ENGINE
Replacing Valve Guide
(When removing)
1. Press out the used valve guide using a valve guide replacing tool.
(See page “SPECIAL TOOLS”.)
(When installing)
1. Clean a new valve guide and valve guide bore, and apply engine
oil to them.
2. Press in a new valve guide using a valve guide replacing tool.
3. Ream precisely the I.D. of the valve guide to the specified
dimension.
• Do not hit the valve guide with a hammer during
replacement.
W10278890
Valve Seating
1. Coat the valve face lightly with prussian blue and put the valve on
its seat to check the contact.
2. If the valve does not seat all the way around the valve seat or the
valve contact is less than 70 %, correct the valve seating as
follows.
3. If the valve contact does not comply with the reference value,
replace the valve or correct the contact of valve seating.
W10282190
Valve guide I.D.
(Intake and exhaust)
Factory spec.
8.015 to 8.030 mm
0.3156 to 0.3161 in.
(A) When Removing (B) When Installing
Valve seat width Factory spec.
2.12 mm
0.0835 in.
(1) Correct
(2) Incorrect
(3) Incorrect
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