7.23 Checking oil clearance between
idle gear shaft and idle gear bushing
Tools required
• External micrometer
•
Internal micrometer
1. Measure the idle gear shaft O.D. with an external
micrometer.
Idle gear shaft
O.D.
Service specifi-
cation
37.959 to 37.975 mm
1.4945 to 1.4950 in.
2. Measure the
idle gear bushing I.D. with an internal
micrometer.
Idle gear bushing
I.D.
Service specifi-
cation
38.000 to 38.025 mm
1.4961 to 1.4970 in.
3. Calculate the oil clearance.
NOTE
• If
the
oil clearance is more than the service
limit, replace the bushing.
Oil clearance be-
tween idle gear
shaft and idle gear
bushing
Service specifi-
cation
0.025 to 0.066 mm
0.00099 to 0.0025 in.
Service limit
0.10 mm
0.0039 in.
RELATED PAGE
7.20 Replacing idle gear bushing on page 4-171
7.24 Checking piston pin bore I.D.
Tools required
• Cylinder gauge
1.
Measure the piston pin bore I.D. in the horizontal
and vertical directions with a cylinder gauge.
NOTE
• If
the
measurement is more than the service
limit, replace the piston.
• When replacing the piston, select the
cylinder head gasket thickness to meet with
the top clearance.
Piston pin bore
I.D.
Service specifi-
cation
25.000 to 25.013 mm
0.98426 to 0.9476 in.
Service limit
25.05 mm
0.9862 in.
RELATED PAGE
4.29 Selecting cylinder head gasket on page 4-111
7.1 Checking cylinder head top clearance
on page
4-162
7.25 Checking oil clearance between
piston pin and small end bushing
Tools required
• External micrometer
•
Internal micrometer or cylinder gauge
SERVICING
7. Servicing 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
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