Crankshaft Assembly Overview

Crankshaft Assembly Overview

CAUTION!
• The upper section of the bearing bracket is bolted to the cylinder block with two M8 multi point socket bolts which are found in the valley between the cylinder heads. These bolts must not be loosened under any circumstances, because it causes a deformation of the cylinder block which is no longer repairable.

• Crankshaft, piston, and connecting rods must not be replaced! Only removal and installation of these components is permitted.





1 Bearing bracket

• Installed in tensioned state.

• Removing and installing, refer to --> [ Bearing Bracket ] Bearing Bracket.

2 Thrust washer

• For lower section of bearing bracket.

3 Main bearing bolt

• Note tightening sequence and specification, refer to --> [ Tightening main bearing bolts ] Bearing Bracket.

4 Bearing shell

5 Crankshaft

• Axial play new: 0.07 to 0.17 mm, Wear limit: 0.37 mm.

• Check radial clearance with Plastigage 0.03 to 0.08 mm, Wear limit: 0.17 mm.

• Do not turn crankshaft when measuring radial play.

• Crankshaft dimensions, refer to --> [ Crankshaft Dimensions ] [1][2]Crankshaft, Engine.

6 8 Nm

7 Oil spray jet

• For piston cooling.

8 Bearing shell

9 Cylinder block

• With upper section of bearing bracket.

• Cylinder bore checking, refer to --> [ Cylinder Bore, Checking ] Piston Rings, Cylinder Bores and Piston Checking

• Piston and cylinder dimensions, refer to --> [ Piston and Cylinder Dimensions ] Piston and Cylinder Dimensions.

10 Engine speed (RPM) sensor (G28)

11 10 Nm

12 Thrust washer

• For upper section of bearing bracket.