Fitting Connecting Rod Bearings - Jeep cherokee 2000 Service Manual

9 - 80 4.0L ENGINE
SERVICE PROCEDURES (Continued)
Fig. 25 Second Compression Ring Identification
1 – SECOND COMPRESSION RING
2 – CHAMFER
3 – ONE DOT
Fig. 26 Compression Ring Chamfer Location
1 – TOP COMPRESSION RING
2 – SECOND COMPRESSION RING
3 – PISTON
4 – CHAMFER
Fig. 27 Compression Ring Installation
1 – COMPRESSION RING
2 – RING EXPANDER RECOMMENDED
Fig. 28 Ring Gap Orientation
1 – TOP COMPRESSION RING
2 – BOTTOM COMPRESSION RING
3 – TOP OIL CONTROL RAIL
4 – OIL RAIL SPACER
5 – BOTTOM OIL CONTROL RAIL
6 – IMAGINARY LINE PARALLEL TO PISTON PIN
7 – IMAGINARY LINE THROUGH CENTER OF PISTON SKIRT

FITTING CONNECTING ROD BEARINGS

INSPECTION
BEARINGS
Inspect the connecting rod bearings for scoring and
bent alignment tabs (Fig. 29) (Fig. 30). Check the
bearings for normal wear patterns, scoring, grooving,
fatigue and pitting (Fig. 31). Replace any bearing
that shows abnormal wear.
Inspect the connecting rod journals for signs of
scoring, nicks and burrs.
CONNECTING RODS
Misaligned or bent connecting rods can cause
abnormal wear on pistons, piston rings, cylinder
walls, connecting rod bearings and crankshaft con-
necting rod journals. If wear patterns or damage to
any of these components indicate the probability of a
misaligned connecting rod, inspect it for correct rod
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