Crankshaft Main Bearing

CRANKSHAFT






MAIN BEARING TORQUE AND SEQUENCE





NOTE: Lubricate the bedplate retaining bolts with clean engine oil prior to installation.

Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Torque the bolts in the sequence shown.
- Tighten bolts A - L to 54 Nm (40 ft. lbs.)
- Tighten bolts 1-10 to 2.8 Nm (25 in. lbs.)
- Turn bolts 1-10 an additional 90°.
- Tighten bolts A1- A6 to 27 Nm (20 ft. lbs.)

CRANKSHAFT MAIN BEARING SELECTION





The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft position sensor target wheel has grade identification marks stamped into it (3). These marks are read from left to right, corresponding with journal number 1, 2, 3, 4 and 5. The crankshaft position sensor target wheel (2) is mounted to the number 8 counter weight (1) on the crankshaft.

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