S-69
V3307-DI-T-E2B, WSM
ENGINE
Piston Ring Gap
1. Insert the piston ring into the lower part of the liner (the least worn
part) with the piston.
2. Measure the ring gap with a feeler gauge.
3. If the gap exceeds the allowable limit, replace the piston ring.
W1066430
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.
W1066183
Top ring
Factory spec.
0.25 to 0.40 mm
0.0099 to 0.015 in.
Allowable limit
1.25 mm
0.0492 in.
Second ring
Factory spec.
0.30 to 0.45 mm
0.012 to 0.017 in.
Allowable limit
1.25 mm
0.0492 in.
Oil ring
Factory spec.
0.25 to 0.45 mm
0.0099 to 0.017 in.
Allowable limit
1.25 mm
0.0492 in.
Factory spec.
Top ring
0.050 to 0.090 mm
0.0020 to 0.0035 in.
Second ring
0.090 to 0.12 mm
0.0036 to 0.0047 in.
Oil ring
0.020 to 0.060 mm
0.00079 to 0.0023 in.
Allowable limit
Top ring
0.15 mm
0.0059 in.
Second ring
0.20 mm
0.0079 in.
Oil ring
0.15 mm
0.0059 in.
KiSC issued 01, 2009 A
