OC60-E2, OC95-E2, WSM
ENGINE
S-43
Clearance between Valve Stem and Valve Guide
1. Measure the valve stem O.D. with an outside micrometer.
2. Measure I.D. of the cylinder head valve guide at the most worn
part with a small hole gauge. and find the oil clearance.
3. If the clearance exceeds the allowable limit, replace the valve
guide and valve.
Free Length and Tilt of Valve Spring
1. Measure the valve spring with vernier calipers.
2. If the measurement is less than the allowable limit, replace it.
3. Place the spring on the surface plate and square at its side.
4. Measure the maximum distance A (See figure) by rotating
spring.
5. If the measurement exceeds the allowable limit, replace the
valve spring.
Clearance
between
valve stem
and valve
guide
Factory spec.
OC60-E2
0.030 to 0.057 mm
0.0012 to 0.0022 in.
OC95-E2
0.035 to 0.065 mm
0.0014 to 0.0026 in.
Allowable limit
OC60-E2
0.1 mm
0.0039 in.
OC95-E2
Valve stem
O.D.
Factory spec.
OC60-E2
5.968 to 5.980 mm
0.2350 to 0.2354 in.
OC95-E2
6.960 to 6.975 mm
0.2740 to 0.2746 in.
Valve guide
bore I.D.
Factory spec.
OC60-E2
6.010 to 6.025 mm
0.2366 to 0.2372 in.
OC95-E2
7.010 to 7.025 mm
0.2760 to 0.2766 in.
0000009261E
Valve spring free
length A
Factory
spec.
OC60-E2
31.3 to 31.8 mm
1.2323 to 1.2520 in.
OC95-E2
36.5 to 37.0 mm
1.4370 to 1.4567 in.
Allowable
limit
OC60-E2
31.0 mm
1.2205 in.
OC95-E2
36.0 mm
1.4173 in.
Tilt B
Allowable limit
1.2 mm
0.0472 in.
0000009263E
