Jeep 1979 CJ-5 Technical & Service Manual page 120

ENGINES 1B-59
Removal
Use this procedure to service connecting rod bearings
with the engine in the vehicle.
(1) Drain engine oil.
(2) Remove oil pan.
(3) Rotate crankshaft as required to position two
connecting rods at a time at bottom of their stroke.
(4) Remove bearing caps and lower inserts.
(5) Remove upper insert by rotating insert out of
connecting rod.
N O T E : Do not mix bearing caps. Connecting rod and
matching cap are stamped with the cylinder number
(fig. 1B-88). The numbers are located on a machined
surface opposite the squirt holes.
Inspection
(1) Clean inserts.
(2) Inspect linings and backs of inserts for irregular
wear pattern. Note any scraping, stress cracks or dis-
tortion (fig. 1B-90). If bearing has spun in rod, replace
bearing and connecting rod and inspect crankshaft jour-
nal for scoring.
(3) Inspect for material imbedded in linings which
may indicate piston, timing gear, distribution gear or oil
pump gear problems. Figures 1B-91 and 1B-92 show
common score problems.
(4) Inspect fit of bearing locking tab in rod cap. If
inspection indicates that insert may have been caught
between rod and rod cap, replace upper and lower bear-
ing inserts.
LOCKING TABS
LOWER
6 0 7 5 7
(5) Inspect insert area of locking tab. Abnormal
wear indicates bent tabs or improper installation of
inserts (fig. 1B-93).
(6) Replace bearing inserts t h a t are damaged or
worn.
LOWER UPPER
6 0 7 5 9
Fig. 1B-91
Scoring Caused by Insufficient Lubrication
6 0 7 6 0
Fig. 1B-92
Scoring Caused by Dirt
A B N O R M A L C O N T A C T A R E A
DUE TO L O C K I N G TABS NOT
F U L L Y SEATED OR BENT TABS
Fig. 1B-90 Connecting Rod Bearing Inspection
Fig. 1B-93 Locking Tab Inspection