Crankshaft Main Bearing: Specifications

Main Bearing cap bolts

Step 1

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





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

Further 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 90° in the numerical order shown in the illustration.
Check that the paint mark is now at a 90° angle to the front.

Main Bearing Clearance, Standard and Limit

Crankshaft
Circle runout
Maximum 0.03 mm (0.00118 in.)

Main Journal Diameter
Standard 54.988 to 55.000 mm (2.1649 to 2.1654 in.)

Main Journal for Taper and Distortion
Maximum 0.003 mm (0.000118 in.)

Crank pin diameter
Standard 47.990 to 48.000 mm (1.8894 to 1.8898 in.)

Crank pin for taper and distortion
Maximum 0.003 mm (0.000118 in.)

Thrust Clearance
Standard 0.04 to 0.24 mm (0.00157 to 0.00945 in.)
Maximum 0.30 mm (0.0118 in.)

Oil Clearance
Standard 0.017 to 0.040 mm (0.000669 to 0.00157 in.)
Maximum 0.060 mm (0.00236 in.)

Crankshaft Bearing Cap Set Bolt
Standard Diameter 7.5 to 7.6 mm (0.295 to 0.299 in.)
Minimum Diameter 7.5 mm (0.295 in.)

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:

Mark 0 59.000 to 59.002 mm (2.32283 to 2.32291 in.)
Mark 1 59.003 to 59.004 mm (2.32295 to 2.32299 in.)
Mark 2 59.005 to 59.006 mm (2.32303 to 2.32307 in.)
Mark 3 59.007 to 59.009 mm (2.32311 to 2.32318 in.)
Mark 4 59.010 to 59.011 mm (2.32322 to 2.32326 in.)
Mark 5 59.012 to 59.013 mm (2.32330 to 2.32334 in.)
Mark 6 59.014 to 59.016 mm (2.32338 to 2.32346 in.)

Standard Diameter (Reference):

Mark 0 54.999 to 55.000 mm (2.16531 to 2.16535 in.)
Mark 1 54.997 to 54.998 mm (2.16523 to 2.16527 in.)
Mark 2 54.995 to 54.996 mm (2.16515 to 2.16519 in.)
Mark 3 54.993 to 54.994 mm (2.16507 to 2.16511 in.)
Mark 4 54.991 to 54.992 mm (2.16500 to 2.16504 in.)
Mark 5 54.988 to 54.990 mm (2.16488 to 2.16496 in.)

Standard Bearing Center Wall Thickness
Mark 1 1.993 to 1.996 mm (0.078464 to 0.078583 in.)
Mark 2 1.997 to 1.999 mm (0.078622 to 0.078701 in.)
Mark 3 2.000 to 2.002 mm (0.078740 to 0.078819 in.)
Mark 4 2.003 to 2.005 mm (0.078858 to 0.078937 in.)