Crankshaft Main Bearing

MAIN BEARING CAP TORQUE AND SEQUENCE

Insert the main bearing cap by hand until the clearance between the main bearing cap and the cylinder block is less than 6 mm (0.23 in.) by using the 2 internal bearing cap bolts as guides.






Bolt Length 100 to 102 mm (3.94 to 4.02 in.)

Install the crankshaft bearing cap bolts.
The main bearing cap bolts are tightened in 2 progressive steps.

Step 1

Install and uniformly tighten the 16 main bearing cap bolts in the sequence shown in the illustration.






Torque 61 Nm (622 kgf-cm, 45 ft-lbf)

If any of the main bearing cap bolts does not meet the torque specified, replace it.

Step 2

Mark the front of the bearing cap bolts with paint.






Retighten the bearing cap bolts by 90° in the order above.
Check that the painted marks are now at a 90° angle to the front.

MAIN BEARING SIZE CODES

There are 5 sizes of standard bearings, marked "1", "2", "3", "4" or "5" accordingly.

Journal Bearings:

EXAMPLE: Cylinder block "11" + Crankshaft "06" = Total number 17 (Use bearing "3")

Standard Upper Bearing Center Wall Thickness (No. 1 and No. 4 journals)






Crankshaft Main Journal Diameter






Standard Lower Bearing Center Wall Thickness (No. 1 and No. 4 journals)






Standard Upper Bearing Center Wall Thickness (No. 2 and No. 3 journals)






Standard Lower Bearing Center Wall Thickness (No. 2 and No. 3 journals)






CRANKSHAFT BEARING CAP SET BOLT

Using a vernier caliper, measure the minimum diameter of the compressed threads at the measuring point.






Standard Diameter 10.8 to 11.0 mm (0.4252 to 0.4331 in.)

Minimum Diameter 10.7 mm (0.4213 in.)

Measuring Point 40 mm (1.57 in.)

Crankshaft