Diesel Data: Automotive Repair

Crankshaft Main Bearing

CRANKSHAFT

Tighten the main bearing cap bolts in 2 progressive steps.

Step 1

Install and uniformly tighten the 10 main bearing cap bolts in the sequence shown in the illustration.






Torque 40 Nm (408 kgf-cm, 30 ft-lbf)


Step 2

Mark the front of the bearing cap bolts with paint.






Further tighten the bearing cap bolts an additional 90° in the numerical order shown in the previous illustration.

Check that the paint mark is now at a 90° angle to the front.

Check that the crankshaft turns smoothly.


MAIN BEARING CLEARANCE STANDARD AND LIMIT










MAIN BEARING SIZE CODES

There are 4 sizes of standard bearings, marked "1", "2", "3" and "4" accordingly.

EXAMPLE: Cylinder block "3" + Crankshaft "5" = Total number 8 (Use bearing "3")