ENGINE
WG972-E4, WSM
1-S47
Idle Gear Side Clearance
1. Set a dial indicator with its tip on the idle gear.
2. Measure the side clearance by moving the idle gear to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the idle
gear collar.
9Y1211108ENS0078US0
Camshaft Side Clearance
1. Set a dial indicator with its tip on the camshaft.
2. Measure the side clearance by moving the cam gear to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the
camshaft stopper.
9Y1211108ENS0079US0
Camshaft Alignment
1. Support the camshaft with V blocks on the surface plate at both
end journals.
2. Set a dial indicator with its tip on the intermediate journal.
3. Measure the camshaft alignment.
4. If the measurement exceeds the allowable limit, replace the
camshaft.
9Y1211108ENS0080US0
Cam Height
1. Measure the height of the cam at its highest point with an
outside micrometer.
2. If the measurement is less than the allowable limit, replace the
camshaft.
9Y1211108ENS0081US0
Idle gear side clearance
Factory specification
0.20 to 0.51 mm
0.0079 to 0.020 in.
Allowable limit
0.80 mm
0.031 in.
Camshaft side clearance
Factory specification
0.15 to 0.31 mm
0.0059 to 0.012 in.
Allowable limit
0.50 mm
0.020 in.
Camshaft alignment Allowable limit
0.01 mm
0.0004 in.
Cam height of intake and
exhaust
Factory specification
26.88 mm
1.058 in.
Allowable limit
26.83 mm
1.056 in.
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