Diesel Data: Automotive Repair

Crankshaft Main Bearing

Main Bearing Cap




Tighten the bearing cap bolts in sequence to 25 N.m (2.5 kgf.m, 18 lbf.ft).

Tighten the bearing cap bolts an additional 40°.

Main Bearing Selection




Crankshaft Bore Code Location




Main Journal Code Location




Journal Code Selection Table

Main bearing-to-journal oil clearance
Standard or New 0.018-0.036 mm (0.0007-0.0014 in.)
Service Limit 0.050 mm (0.0020 in.)
Main journal diameter
Standard or New 49.976-50.000 mm (1.9676-1.9685 in.)
Rod/main journal out-of-round
Standard or New 0.005 mm (0.0002 in.)
Service Limit 0.010 mm (0.0004 in.)