Crankshaft Main Bearing

Main Bearing Cap

Bolt
40 Nm + 90° (1/4) additional turn.
Always replace.
Fully threaded.
Tighten to 40 Nm (but not any further) to measure the crankshaft radial play.

Main Bearing Clearance

Axial play
new: 0.07 to 0.21 mm.
Wear limit: 0.30 mm.

Measure radial clearance using Plastigage.
New: 0.023 to 0.043 mm
wear limit: 0.07 mm
Do not rotate the crankshaft when measuring the radial play.






Main Bearing Shell, Allocating

From the factory, the upper bearing shells are allocated to the cylinder block with the correct thickness. Colored dots serve to identify the bearing thicknesses.

The letters marked on the lower sealing surface of the cylinder block identify which bearing thickness must be installed in which location.

Yellow
Blue
White

Crankshaft/Upper Bearing Shell Mark





The - arrow - points in the direction of travel.

If the colored marks can no longer be read, use the bearing shell with the "blue" mark.

The lower crankshaft bearing shells are always shipped as a replacement part with the "yellow" mark.






Crankshaft Dimensions

(Dimensions are in mm)