Crankshaft Main Bearing

Intermediate Section





Replace M10 screws
Tighten screws in sequence from 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°

Classification of main bearings





The marking is stamped on the cylinder block and crankshaft





Crank mechanism





Crankshaft
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 0.019-0.043 mm





Big end journals
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.

Main bearing journals
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.