Piston Ring-Fitting - Jeep cherokee 2000 Service Manual

9 - 18 2.5L ENGINE
SERVICE PROCEDURES (Continued)
Fig. 18 Moly Coated Piston
1 – MOLY COATED
2 – MOLY COATED
Fig. 19 Bore Gauge
1 – FRONT
2 – BORE GAUGE
3 – CYLINDER BORE
4 – 49.5 MM
(1–15/16 in)
PISTON SIZE CHART
CYLINDER BORE SIZE
98.438 - 98.448 mm
(3.8755 - 3.8759 in.)
98.448 - 98.458 mm
(3.8759 - 3.8763 in.)
98.458 - 98.468 mm
(3.8763 - 3.8767 in.)
98.468 - 98.478 mm
(3.8767 - 3.8771 in.)
98.478 - 98.488 mm
(3.8771 - 3.8775 in.)
98.488 - 98.498 mm
(3.8775 - 3.8779 in.)
PISTON RING—FITTING
(1) Carefully clean the carbon from all ring
grooves. Oil drain openings in the oil ring groove and
pin boss must be clear. DO NOT remove metal from
the grooves or lands. This will change ring-to-groove
clearances and will damage the ring-to-land seating.
(2) Be sure the piston ring grooves are free of
nicks and burrs.
(3) Measure the ring side clearance with a feeler
gauge fitted snugly between the ring land and ring
(Fig. 20) (Fig. 21). Rotate the ring in the groove. It
must move freely around circumference of the groove.
Fig. 20 Piston Dimensions
XJ
PISTON LETTER SIZE
A
B
C
D
E
F