Crankshaft, Engine

Classification of Main Bearings





The marking is stamped on the cylinder block and crankshaft





Crank Mechanism





Main bearing journal radial runout maximum 0.040 mm
Axial play (Measured in the engine with the intermediate section tightened) 0.08-0.19 mm
Main bearing journal radial runout 0.020-0.043 mm





Diameter(1) 50.000 +0/-0.016 mm
Bearing recess width 26.0 ± 0.1 mm
Maximum out-of-round 0.004 mm
Maximum taper 0.004 mm
(1) The variation in diameter for each bearing journal must not exceed 0.008 mm
Diameter(1) 65.000 +0.003/-0.016 mm
Axial bearing width dimension 26.00 +0/-0.04 mm
Maximum out-of-round 0.004 mm
Maximum taper 0.004 mm
(1) The variation in diameter for each bearing journal must not exceed 0.008 mm.

Crankshaft Main Bearing Fasteners
Please also refer to Crank Mechanism, Assembling for additional information. Crank Mechanism, Assembling





Caution! The M8 screws on the exhaust side are two different lengths.

Note! Use new M10-screws.

Tighten the screws in sequence from the center and outwards.

First pass: All M10 screws 20 Nm
Second pass: All M10 screws 45 Nm
Third pass: All M8 screws 24 Nm
Fourth pass: All M7 screws 17 Nm
Final pass: Angle-tighten all M10 screws 90°