Crankshaft Main Bearing

Main Bearing Cap Torque and Sequence

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.

Main Bearing Clearance, Standard and Limit

Standard thrust clearance 0.04 to 0.14 mm (0.0016 to 0.0055 in.)
Maximum thrust clearance 0.18 mm (0.0071 in.)
Thrust washer thickness 2.43 to 2.48 mm (0.0957 to 0.0976 in.)

Cylinder block main journal bore diameter (Reference)
Mark 0 52.000 to 52.003 mm (2.0472 to 2.0474 in.)
Mark 1 52.003 to 52.005 mm (2.0474 to 2.0474 in.)
Mark 2 52.005 to 52.007 mm (2.0474 to 2.0475 in.)
Mark 3 52.007 to 52.010 mm (2.0475 to 2.0476 in.)
Mark 4 52.010 to 52.012 mm (2.0476 to 2.0477 in.)
Mark 5 52.012 to 52.014 mm (2.0477 to 2.0478 in.)
Mark 6 52.014 to 52.016 mm (2.0478 to 2.0479 in.)

Main Journal Diameter 47.988 to 48.000 mm (1.8893 to 1.8898 in.)

Maximum Taper and Distortion 0.004 mm (0.0002 in.)

Main Journal Diameter (Reference)
Mark 0 47.999 to 48.000 mm (1.8897 to 1.8898 in.)
Mark 1 47.997 to 47.998 mm (1.8896 to 1.8897 in.)
Mark 2 47.995 to 47.996 mm (1.8896 to 1.8896 in.)
Mark 3 47.993 to 47.994 mm (1.8895 to 1.8895 in.)
Mark 4 47.991 to 47.992 mm (1.8894 to 1.8894 in.)
Mark 5 47.988 to 47.990 mm (1.8893 to 1.8894 in.)

Crankshaft journal diameter (Reference)
Mark 0 47.999 to 48.000 mm (1.8897 to 1.8898 in.)
Mark 1 47.997 to 47.998 mm (1.8896 to 1.8897 in.)
Mark 2 47.995 to 47.996 mm (1.8896 to 1.8896 in.)
Mark 3 47.993 to 47.994 mm (1.8895 to 1.8895 in.)
Mark 4 47.991 to 47.992 mm (1.8894 to 1.8894 in.)
Mark 5 47.988 to 47.990 mm (1.8893 to 1.8894 in.)

Standard Bearing Center Wall Thickness (Reference)
Mark 1 1.994 to 1.997 mm (0.0785 to 0.0786 in.)
Mark 2 1.998 to 2.000 mm (0.07866 to 0.07874 in.)
Mark 3 2.001 to 2.003 mm (0.0788 to 0.0789 in.)
Mark 4 2.004 to 2.006 mm (0.0789 to 0.0790 in.)

Maximum circle runout 0.03 mm (0.0012 in.)

Standard Oil Clearance 0.016 to 0.039 mm (0.0006 to 0.0015 in.)
Maximum Oil Clearance 0.050 mm (0.0020 in.)

Crank pin diameter 43.992 to 44.000 mm (1.7320 to 1.7323 in.)

Crankshaft bearing
Dimension A 0.5 to 1.0 mm (0.020 to 0.039 in.)
Dimension A-B 0.5 mm (0.0197 in.) or less

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")