CRANKSHAFT AND BEARINGS.

(5) Put a light coat of oil in the crankshaft end

(1) Remove the oil pan.

of the connecting rod and install upper half of connecting

(2) Mark the main bearing caps for correct

rod bearing, making certain that the bearing lock fits in

installation.

the machined groove in the rod. Apply a light coat of oil

to the bearing half, and install the piston and connecting

NOTE

rod in the cylinder bore.

(6) Connecting rods are numbered according

To keep crankshaft supported, one

to cylinder bore in which they must be installed. Oil

pair of bearings should be replaced at

squirt hole in rod should be installed toward camshaft

a time, leaving bearing capscrews

side of engine.

snug, but not tight when installing,

Crankshaft journal should be at bottom dead center of

until all bearings are replaced.

bore in which piston and rod is being installed. Use a

hammer handle to force piston through compressor into

(3) Remove main bearing capscrews and

cylinder bore. While forcing piston into bore, ring

remove bearing caps from engine block.

compressor must be kept tight against cylinder block to

(4) Remove bearing insert halves (Figure 6-

prevent damage to piston rings as they are forced into

38) from caps.

bore.

(5) Insert bearing removing tool or flat head

(7) Apply a light coat of oil to connecting rod

rivet, with head thickness less than that of bearing shell,

bearing cap and install lower half of the connecting rod

into oil hole in the crankshaft journal. Rotate crankshaft

bearing in cap, making certain that bearing lock fits in

so that tool or rivet forces upper bearing half out of

machined notch of rod. Apply a light coat of oil to

engine block. Make certain to rotate crankshaft in proper

bearing and install bearing cap and bearing on

direction so that bearing lock is pushed out of notch in

connecting rod. Tighten nuts to 39 foot pounds torque.

engine block.

Install cotter pins in nuts.

(6) Coat new bearing half with OE and insert

(8) Complete installation of pistons. Before

in same manner as old bearing half was removed.

replacing the engine head, squirt a few drops of oil

(7) Coat lower bearing half with OE and insert

around edges of pistons to help lubricate rings when

in bearing cap.

starting engine.

(8) Install bearing cap following procedures in

(9) Complete installation by reversing removal

b. below to check clearances. After clearance is

procedure.

checked, leave capscrews loose so other bearings may

6-81. CRANKSHAFT AND BEARINGS.

be accurately checked.

a. Replacement of crankshaft bearings.

Figure 6-38. Measuring Main Bearing Clearance

109