Crankshaft, Engine

Classification of Main Bearings





The marking is stamped on the cylinder block and crankshaft.




1. Classification cylinder block
2. Classification crankshaft
3. Cylinder block
4. Intermediate section

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, standard(1) 50.000 +0/-0.016
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, standard(1) 65.000 +0.003/-0.016 mm
Axial bearing width 26.00 +0/-0.04mm
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 refer to Crank Mechanism, Assembling for additional information. Crank Mechanism, Assembling





Note! Use new M10 bolts.

Caution! The M8-bolts on the exhaust side have two lengths.

Tighten the screws in sequence from the center and outwards.

First pass: M10 20 Nm
Second pass: M10 45 Nm
Third pass: M8 24 Nm
Fourth pass: M7 17 Nm
Final pass: M10 90°

Crankshaft Axial Play maximum 0.25 mm