Crankshaft Main Bearing

MAIN BEARING









If your bolt heads look like this (1,2), use the following torque specifications:

Tighten bolts using a three step method, in the sequence shown.
Tighten bolts to 15 Nm (11 ft. lbs.)
Tighten bolts to 27 Nm (20 ft. lbs.)
Rotate an additional 45°.

If your bolt heads do not look like this (1,2), use the following torque specifications:

Tighten bolts using a three step method, in the sequence shown.
Tighten bolts to 15 Nm (11 ft. lbs.)
Tighten bolts to 45 Nm (33 ft. lbs.)
Rotate an additional 45°.


Main Bearing Bore Diameter
1 56.000 - 56.006 mm (2.2047 - 2.2049 in.)
2 56.006 - 56.012 mm (2.2049 - 2.2051 in.)
3 56.012 - 56.018 mm (2.2051 - 2.2054 in.)

Main Bearing Bore Diameter Taper (Max.) 0.0082 mm (0.0003 in.)

Main Bearing Journal Diameter
Journal Grade
0 51.985 - 51.988 mm (2.0466 - 2.0467 in.)
1 51.982 - 51.985 mm (2.0465 - 2.0466 in.)
2 51.979 - 51.982 mm (2.0464 - 2.0465 in.)
3 51.976 - 51.979 mm (2.0462 - 2.0464 in.)
4 51.973 - 51.976 mm (2.0461 - 2.0462 in.)

Journal Out-of-Round (Max.) 0.005 mm (0.0001 in.)

Journal Taper (Max.) 0.006 mm (0.0002 in.)

Main Bearing Diametrical Clearance 0.028 - 0.048 mm (0.0011 - 0.0018 in.)
Main Bearing Diametrical Clearance (Max) 0.058 mm (0.0022 in.)

Lower Main Bearing Selection





Upper Main Bearing Selection