Jeep Cherokee 1999 Electronic Service Manual page 1077

9 - 60 4.0L ENGINE
SERV I CE PROCEDU RES (Cont inue d)
Fig. 4 Bore Gauge
(3) Mea su r e t h e r in g side clea r a n ce wit h a feeler
ga u ge fit t ed sn u gly bet ween t h e r in g la n d a n d r in g
(F ig. 5) (F ig. 6). Rot a t e t h e r in g in t h e gr oove. It
m u st m ove fr eely a r ou n d cir cu m fer en ce of t h e gr oove.
Fig. 5 Piston Dimensions
Fig. 6 Ring Side Clearance Measurement
Rin g S id e Cle a ra n c e Me a s u re m e n t
Top Com pr ession Rin g . . . . . . . . 0.042 t o 0.084 m m
Secon d Com pr ession Rin g . . . . . . 0.042 t o 0.084 m m
Oil Con t r ol Rin g . . . . . . . . . . . . . . . 0.06 t o 0.21 m m
(4) P la ce r in g in t h e cylin der bor e a n d pu sh down
wit h in ver t ed pist on t o posit ion n ea r lower en d of t h e
r in g t r a vel. Mea su r e r in g ga p wit h a feeler ga u ge fit -
t in g sn u gly bet ween r in g en ds (F ig. 7).
Fig. 7 Gap Measurement
X J
(0.0017 t o 0.0033 in .)
(0.0017 t o 0.0033 in .)
(0.0024 t o 0.0083 in .)