Inspection; Installation - Chrysler Vehicle User Manual

9 - 104 ENGINE 4.0L
CRANKSHAFT MAIN BEARINGS (Continued)
Fig. 45 Removing Main Bearing Caps and Lower
1 - CONNECTING ROD JOURNAL
2 - MAIN BEARING CAPS
Fig. 46 Removing Upper Inserts
1 - COTTER PIN
2 - BEARING INSERT
3 - TONGUE DEPRESSOR

INSPECTION

Wipe the inserts clean and inspect for abnormal
wear patterns and for metal or other foreign material
Inserts
imbedded in the lining. Normal main bearing insert
wear patterns are illustrated (Fig. 47). In general the
lower bearing half will have a heaver wear pattern.
Fig. 47 Main Bearing Wear Patterns
1 - UPPER INSERT
2 - NO WEAR IN THIS AREA
3 - LOW AREA IN BEARING LINING
4 - LOWER INSERT
NOTE: If any of the crankshaft journals are scored,
remove the engine for crankshaft repair.
Inspect the back of the inserts for fractures, scrap-
ings or irregular wear patterns.
Inspect the upper insert locking tabs for damage.
Replace all damaged or worn bearing inserts.

INSTALLATION

(1) Lubricate the bearing surface of each insert
with engine oil.
(2) Loosen all the main bearing caps. Install the
main bearing upper inserts.
(3) Install the lower bearing inserts into the main
bearing caps.
(4) On the rear main cap, apply Mopar
Maker sealer on both sides of cylinder block as
shown in (Fig. 48). The dab of sealer should be 3 mm
(0.125 in.) in diameter.
(5) Apply Mopar Gasket Maker on the rear bear-
ing cap. The bead should be 2.3 mm (0.09 in.) in
diameter. DO NOT apply sealer to the lip of the seal.
(6) Install the main bearing cap(s) and lower
insert(s).
(7) Tighten the bolts of caps 1, 2, 4, 5, 6, and 7 to
54 N·m (40 ft. lbs.) torque. Now tighten these bolts to
95 N·m (70 ft. lbs.) torque. Finally, tighten these
bolts to 108 N·m (80 ft. lbs.) torque.
(8) Push the crankshaft forward and backward.
Load the crankshaft front or rear and tighten cap
bolt No.3 to 54 N·m (40 ft. lbs.) torque. Then tighten
TJ
Gasket