Crankshaft Main Bearing

CRANKSHAFT

The main bearing cap bolts should be tightened in 3 progressive steps.

Step 1:






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

Torque 20 Nm (204 kgf-cm, 15 ft-lbf)

Step 2:

Tighten the bearing cap bolts in several steps in the sequence shown in the illustration.

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

Step 3:






Mark the front of the bearing cap bolts with paint.






Further tighten the bearing cap bolts by 90° in the sequence shown in the previous illustration.
Check that the paint mark is now at a 90° angle to the front.

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")






Standard cylinder block journal bore diameter:






Standard crankshaft journal diameter:






Standard bearing center wall thickness: