Crankshaft Main Bearing

Crankshaft Bearing Cap Tightening Sequence:

Crankshaft Bearing Cap Bolt - Angular Tightening Method
1st Step 98 Nm (1st Step 72 ft. lbs.)
2nd Step 132 Nm (2nd Step 97 ft. lbs.)
3rd Step 30 degrees (3rd Step 30 degrees )
Crankshaft Bearing Cap Side Bolt 78 Nm (58 ft. lbs.)
Material Forged Steel Heat Treatment Nitrided
Main Journal Diameters 80.0 mm (3.15 inch)
Crankpin Diameter 63.0 mm (2.48 inch)
Harmonic Balancer Rubber Damper
Flywheel Material Cast Iron
Main Bearing Type Steel Backed Pb-Sn-Cu Overlay
Number of Bearings 5
End Thrust Taken By Crank Thrust Bearing
Total Bearing Length 103.5 mm (4.07 inch)
Total Projected Area 13,006 mm (2) (2 20.16 inch) (2)
Crankshaft Bearing Clearance - Service Limits 0.014 mm (0.0055 inch)
Crankshaft Bearing Clearance - Production Value 0.037-0.072 mm (0.0015-0.0028 inch)
Crankshaft End Play - Service Limits 0.54 mm (0.0213 inch)
Crankshaft End Play - Production Value 0.04-0.205 mm (0.0016-0.0081 inch)
Crankshaft Journal Diameter - Main - Service Limits 79.89 mm (3.1453 inch)
Crankshaft Journal Diameter - Main - Production Value 79.905-79.925 mm (3.1459-3.1466 inch)
Crankshaft Runout - Service Limits 0.44 mm (0.0173 inch)
Crankshaft Runout - Production Value 0.05 mm (0.0020 inch)
Crankpin Diameter - Service Limits 62.88 mm (2.4756 inch)
Crankpin Diameter - Production Value 62.902-62.922 mm (2.4764-2.4772 inch)