Crankshaft Main Bearing

CYLINDER BLOCK

Cylinder Block:

CRANKSHAFT

Crankshaft:

MAIN BEARING CAP TORQUE AND SEQUENCE

NOTE: The main cap crossbolts are torqued after final torque of the main cap bolts. Always use a new washer/seal on crossbolts.

1. Clean and oil all cap bolts. Install all main bearing caps (1). Install all cap bolts and alternately tighten in two steps using the following sequence.





2. Step 1 - 27 Nm ( 20 ft. lbs.).
3. Step 2 - Turn main cap bolts an additional 90°.
4. Install the crossbolts with new washer/gasket. Starting with crossbolt A, tighten each crossbolt to 28 Nm ( 21 ft. lbs.).
5. Repeat crossbolt tightening procedure.

CRANKSHAFT MAIN BEARING SELECTION

The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft counterweight has grade identification marks stamped into it. These marks are read from left to right, corresponding with journal number 1, 2, 3, 4 and 5.

NOTE: Service main bearings are coded. These codes identify what size (grade) the bearing is.