wsm wg972-e4 - Page 141

ENGINE
WG972-E4, WSM
1-S50
Piston Ring Gap
1. Insert the piston ring into the lower part of the cylinder (the least
worn out part) with a piston ring compressor and piston.
2. Measure the ring gap with a feeler gauge.
3. If the measurement exceeds the allowable limit, replace the
piston ring.
9Y1211108ENS0088US0
Piston ring gap
Top r i ng
Factory
specifica-
tion
0.15 to 0.35 mm
0.0059 to 0.013 in.
Allowable
limit
1.25 mm
0.0492 in.
Second
ring
Factory
specifica-
tion
0.30 to 0.45 mm
0.012 to 0.017 in.
Allowable
limit
1.25 mm
0.0492 in.
Oil ring
Factory
specifica-
tion
0.20 to 0.70 mm
0.0079 to 0.027 in.
Allowable
limit
1.25 mm
0.0492 in.
KiSC issued 07, 2015 A