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INSPECTION Wipe the inserts clean and inspect for abnormal wear patterns and for metal or other foreign material imbedded in the lining. Normal main bearing insert NOTE: If any of the crankshaft journals are scored, Inspect the back of the inserts for fractures, scrap- ings or irregular wear patterns. Inspect the upper insert locking tabs for damage. 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 t Gasket Maker sealer on both sides of cylinder block as (5) Apply Mopar t Gasket Maker on the rear bear- ing cap. The bead should be 2.3 mm (0.09 in.) in (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 (8) Push the crankshaft forward and backward. Load the crankshaft front or rear and tighten cap Fig. 46 Removing Main Bearing Caps and Lower Inserts 1 - CONNECTING ROD JOURNAL Fig. 47 Removing Upper Inserts 1 - COTTER PIN Fig. 48 Main Bearing Wear Patterns 1 - UPPER INSERT TJ ENGINE 4.0L 9 - 107 CRANKSHAFT MAIN BEARINGS (Continued) |