S-81
03-M Series, WSM
DIESEL ENGINE
Clearance between Piston Ring and Groove
1. Clean the rings and the ring grooves, and install each ring in its
groove.
2. Measure the clearance between the ring and the groove with a
feeler gauge or depth gauge.
3. If the clearance exceeds the allowable limit, replace the piston
ring.
4. If the clearance still exceeds the allowable limit with new ring,
replace the piston.
W1032489
Connecting Rod Alignment
NOTE
Q
• Since the I.D. of the connecting rod small end bushing is the
basis of this check, check bushing for wear beforehand.
1. Install the piston pin into the connecting rod.
2. Install the connecting rod on the connecting rod alignment tool.
3. Put a gauge over the piston pin, and move it against the face
plate.
4. If the gauge does not fit squarely against the face plate, measure
the space between the pin of the gauge and the face plate.
5. If the measurement exceeds the allowable limit, replace the
connecting rod.
W1032720
Second ring
Factory
spec.
D1503-M
0.093 to 0.120 mm
0.0037 to 0.0047 in.
D1703-M
D1803-M
V2203-M
V2403-M
0.093 to 0.128 mm
0.0037 to 0.0050 in.
Allowable limit
0.20 mm
0.0079 in.
Oil ring
Factory spec.
0.020 to 0.060 mm
0.0008 to 0.0021 in.
Allowable limit
0.15 mm
0.0059 in.
Connecting rod
alignment
Allowable limit
0.05 mm
0.0020 in.
KiSC issued 08, 2012 A
