Jeep Wrangler 1997 Manual page 741

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REMOVAL AND INSTALLATION (Continued)

MAIN BEARING CAP BRACE

Fig. 46 Main Bearing Caps and Brace.

Fig. 47 Stamped Connecting Rods and Caps

Ensure that the connecting rod bolts

DO NOT scratch the crankshaft journals or cylinder

walls . Short pieces of rubber hose, slipped over the

rod bolts will provide protection during removal .

(12) Have an assistant push the piston and con-

necting rod assemblies up and through the top of the

cylinder bores (Fig. 48) .

INSTALLATION

(1) Clean the cylinder bores thoroughly. Apply a

light film of clean engine oil to the bores with a clean

lint-free cloth.

(2) Install the piston rings on the pistons if

(3) Lubricate the piston and rings with clean

engine oil .

Ensure that connecting rod bolts DO

NOT scratch the crankshaft journals or cylinder

walls. Short pieces of rubber hose slipped over the

connecting rod bolts will provide protection during

installation .

(4) Use a piston ring compressor to install the con-

necting rod and piston assemblies through the top of

the cylinder bores (Fig. 49) .

(5) Ensure the arrow on the piston top points to

the front of the engine (Fig . 49) .

Fig. 48 Removal of Connecting Rod and Piston

Fig. 49 Rod and Piston Assembly Installation

Raise the vehicle .

(7) Each bearing insert is fitted to its respective

journal to obtain the specified clearance between the

bearing and the journal . In production, the select fit

is obtained by using various-sized, color-coded bear-

ing inserts as listed in the Connecting Rod Bearing

Troubleshooting