Diesel Data: Automotive Repair

Crankshaft Main Bearing

CRANKSHAFT
Main journal
Diameter
Standard 66.988 to 67.000 mm (2.6373 to 2.6378 in.)
Taper and out-of-round
Maximum 0.02 mm (0.0008 in.)
Crank pin
Diameter
Standard 52.982 to 53.000 mm (2.0859 to 2.0866 in.)
Taper and out-of-round
Maximum 0.02 mm (0.0008 in.)
Oil clearance
No. 1 and No. 5 journal
Standard 0.017 to 0.030 mm (0.0007 to 0.0012 in.)
Maximum 0.050 mm (0.0020 in.)
Other journal
Standard 0.024 to 0.037 mm (0.0009 to 0.0015 in.)
Maximum 0.060 mm (0.0024 in.)
Main journal diameter
Mark 00 66.999 to 67.000 mm (2.63776 to 2.63780 in.)
Mark 01 66.998 to 66.999 mm (2.63772 to 2.63776 in.)
Mark 02 66.997 to 66.998 mm (2.63768 to 2.63772 in.)
Mark 03 66.996 to 66.997 mm (2.63764 to 2.63768 in.)
Mark 04 66.995 to 66.996 mm (2.63760 to 2.63764 in.)
Mark 05 66.994 to 66.995 mm (2.63756 to 2.63760 in.)
Mark 06 66.993 to 66.994 mm (2.63752 to 2.63756 in.)
Mark 07 66.992 to 66.993 mm (2.63748 to 2.63752 in.)
Mark 08 66.991 to 66.992 mm (2.63744 to 2.63748 in.)
Mark 09 66.990 to 66.991 mm (2.63740 to 2.63744 in.)
Mark 10 66.989 to 66.990 mm (2.63736 to 2.63740 in.)
Mark 11 66.988 to 66.989 mm (2.63736 to 2.63736 in.)

CRANKSHAFT MAIN BEARING CAP
The main bearing cap bolts are tightened in 2 progressive steps.





Step 1:
Install and uniformly tighten the 20 main bearing cap bolts in the sequence shown in the illustration.
Torque: 61 N*m (622 kgf*cm, 45 ft.*lbf) for inside position
Torque: 27 N*m (275 kgf*cm, 20 ft.*lbf) for outside position
If any of the main bearing cap bolts does not meet the specified torque, replace it.





Step 2:
Mark the front of the bearing cap bolts with paint.
Tighten the bearing cap bolts another 90° in the order shown in step 1.
heck that the painted marks are now at a 90° angle to the front.
Check that the crankshaft turns smoothly.





Install and uniformly tighten the 10 main bearing cap bolts and 10 seal washers in several steps, in the sequence shown in the illustration.
Torque 45 N*m (459 kgf*cm, 33 ft.*lbf)