wsm wg972-e4 Workshop Manual page 135

WG972-E4, WSM
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.
Factory specification
Clearance between
valve stem and valve
guide (Inlet)
Allowable limit
Valve stem O.D. (Inlet) Factory specification
Valve guide I.D. (Inlet) Factory specification
Factory specification
Clearance between
valve stem and valve
guide (Exhaust)
Allowable limit
Valve stem O.D.
Factory specification
(Exhaust)
Valve guide I.D.
Factory specification
(Exhaust)
Replacing Valve Guide
(When removing)
1. Press out the used valve guide using a valve guide replacing
tool.
(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.
Valve guide I.D.(Intake
Factory specification
and exhaust)
IMPORTANT
• Do not hit the valve guide with a hammer during
replacement.
(A) When Removing
1-S44
ENGINE
0.030 to 0.057 mm
0.0012 to 0.0022 in.
0.10 mm
0.0039 in.
5.965 to 5.980 mm
0.2348 to 0.2354 in.
6.010 to 6.025 mm
0.2367 to 0.2372 in.
0.030 to 0.057 mm
0.0012 to 0.0022 in.
0.10 mm
0.0039 in.
5.968 to 5.980 mm
0.2350 to 0.2354 in.
6.010 to 6.025 mm
0.2367 to 0.2372 in.
9Y1211108ENS0070US0
6.010 to 6.025 mm
0.2367 to 0.2372 in.
(B) When Installing
9Y1211108ENS0071US0
KiSC issued 07, 2015 A