Piston Ring Gap - Nanni N4.40 Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM

Piston Ring Gap

1. Put the piston ring into the lower part of the liner (the least worn
out part) with the piston.
2. Measure the ring gap with a feeler gauge.
3. If the ring gap is more than the allowable limit, replace the ring.
Factory
spec.
Top ring
Allowable limit
Factory
spec.
Second ring
Allowable limit
Factory
spec.
Oil ring
Allowable limit
1-S90
D1503-M,
V2003-M,
V2403-M-T,
D1803-M-DI, 0.20 to 0.35 mm
V2403-M-DI, 0.0079 to 0.013 in.
V2403-M-DI-T,
V2003-M-BG,
V2003-M-T-BG
D1703-M,
D1803-M,
V2203-M,
0.25 to 0.40 mm
V2403-M,
0.0099 to 0.015 in.
D1703-M-BG,
V2203-M-BG,
V2403-M-BG
1.25 mm
0.0492 in.
D1503-M,
D1703-M,
D1803-M,
V2203-M,
V2403-M,
0.30 to 0.45 mm
D1803-M-DI,
0.012 to 0.017 in.
V2403-M-DI,
D1703-M-BG,
V2003-M-BG,
V2203-M-BG,
V2403-M-BG
V2003-M,
V2403-M-T, 0.40 to 0.55 mm
V2403-M-DI-T, 0.016 to 0.021 in.
V2003-M-T-BG
1.25 mm
0.0492 in.
D1503-M,
D1703-M,
D1803-M,
V2003-M,
V2203-M,
V2403-M,
0.25 to 0.45 mm
V2403-M-T,
0.0099 to 0.017 in.
V2403-M-DI-T,
D1703-M-BG,
V2003-M-BG,
V2003-M-T-BG,
V2203-M-BG,
V2403-M-BG
D1803-M-DI, 0.20 to 0.40 mm
V2403-M-DI 0.0079 to 0.015 in.
1.25 mm
0.0492 in.
M00000003ENS0134US1
ENGINE
KiSC issued 06, 2009 A