Crankshaft Overview

Crankshaft Overview

• Secure the engine to the assembly stand using the engine and transmission holder (VAS 6095) when performing any repair work. Refer to => [ Engine, Securing to the ] Procedures.






1 Cylinder Block

• Cylinder bore checking. Refer to => [ Cylinder Bore, Checking ] Testing and Inspection.

• If the cylinder block is being replaced, then the bearing shells must be allocated again. Refer to => [ Main Bearing Shell Allocation ] Service and Repair.

• For the correct piston and cylinder dimensions, refer to => [ Piston and Connecting Rod Overview ] Service and Repair.

2 Bearing Shell for the Cylinder Block

• With a lubricating groove.

• Do not interchange used bearing shells (mark them).

• Crankshaft bearing shell, allocating. Refer to => [ Main Bearing Shell Allocation ] Service and Repair.

3 Crankshaft

• After removal, lay aside so that sensor wheel - 8 - is not rested on and becomes damaged.

• If the crankshaft is being replaced, then the bearing shells must be allocated to the bearing cap. Refer to => [ Main Bearing Shell Allocation ] Service and Repair.

• Crankshaft bearing cap tightening sequence. Refer to => [ Crankshaft Bearing Cap Bolt Tightening Sequence and Specification ].

• Crankshaft needle bearing, replacing. (vehicles with a Direct Shift Gearbox(R)). Refer to => [ Crankshaft Needle Bearing ] Service and Repair.

• Checking the axial play, refer to => [ Crankshaft Axial Clearance, Checking ] Crankshaft Axial Clearance, Checking.

• Checking the radial play, refer to => [ Crankshaft Radial Clearance, Checking ] Crankshaft Radial Clearance, Checking.

• Do not rotate the crankshaft when measuring the radial play.

• Crankshaft dimensions, refer to => [ Crankshaft Dimensions ] Specifications.

4 Bearing Shell

• Without a lubricating groove.

• Do not interchange used bearing shells (mark them).

• Crankshaft bearing shell, allocating. Refer to => [ Main Bearing Shell Allocation ] Service and Repair.

5 Bolt

• Tightening sequence and specification, refer to => [ Crankshaft Bearing Cap Bolt Tightening Sequence and Specification ].

• Always replace.

6 Bearing Cap

• Bearing cap 1: Belt pulley side.

• Retaining tabs on the bearing shells and cylinder block/bearing caps must align above one another.

7 Screw

• 10 Nm + an additional 90° (1/4) turn.

• Always replace.

• Replace the sensor wheel every time the screws are loosened. Refer to => [ Crankshaft Sensor Wheel ] Service and Repair.

8 Sensor Wheel

• For the engine speed sensor.

• Only possible to install in one position - Bores are offset.

• Replace the sensor wheel every time the screws are loosened. Refer to => [ Crankshaft Sensor Wheel ] Service and Repair.

9 Thrust Washers

• For bearing 3.

10 Bolt

• Tightening sequence, refer to => [ Crankshaft Bearing Cap Bolt Tightening Sequence and Specification ].

• Always replace.

Crankshaft Bearing Cap Bolt Tightening Sequence and Specification





- Tighten the crankshaft bearing cap bolts in sequence - 1 through 10 - as follows:

1. Tighten the bolts - 1 through 10 - and the - arrows - by hand.

2. Tighten the bolts - 1 through 10 - to 65 Nm.

3. Tighten the bolts - 1 through 10 - an additional 90° (1/4) turn using a ratchet.

4. Tighten the bolts - arrows - to 20 Nm.

5. Tighten the bolts - arrows - an additional 90° (1/4) turn using a ratchet.