S-76
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM
DIESEL ENGINE
Clearance between Valve Stem and Valve Guide
1. Remove carbon from the valve guide section.
2. Measure the valve stem O.D. with an outside micrometer.
3. Measure the valve guide I.D. with a small hole gauge, and
calculate the clearance.
4. If the clearance exceeds the allowable limit, replace the valves.
If it still exceeds the allowable limit, replace the valve guide.
W10774950
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.
IMPORTANTQ
• Do not hit the valve guide with a hammer during
replacement.
W10278890
Clearance between
valve stem and valve
guide
Factory spec.
0.040 to 0.070 mm
0.0016 to 0.0027 in.
Allowable limit
0.10 mm
0.0039 in.
Valve stem O.D. Factory spec.
7.960 to 7.975 mm
0.3134 to 0.3139 in.
Valve guide I.D. Factory spec.
8.015 to 8.030 mm
0.3156 to 0.3161 in.
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
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