Crankshaft Overview

Crankshaft Overview

• The engine is to be secured to the engine and transmission holder (VAS 6095) when performing repair work.

• Before removing the crankshaft, prepare for appropriate storage, so that the sensor wheel (- item 6 -) does not make contact or become damaged.

• If large quantities of metal particles or abraded material are detected during engine repairs, it may mean the crankshaft or connecting rod bearings are damaged. Perform the following procedure after the repair to prevent subsequent damage.

• Clean the oil passages carefully.

• Replace the oil check valve.

• Replace the oil spray jets.

• Replace the engine oil cooler.

• Replace the oil filter element.






1 Bearing Cap

• Bearing cap 1: Vibration damper side.

• Bearing cap 5 with notches for the thrust washers.

• The retaining tabs on the bearing shells and cylinder block/bearing caps must align with one another.

2 Bolt

• 30 Nm + an additional 180° (1/2) turn.

• Always replace.

• Two additional 90° (1/4) turn turns is permitted.

3 Bearing Shells, 1 through 7

• For bearing caps without a oil groove.

• For the cylinder block with a oil groove.

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

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

4 Thrust Washer

• For bearing cap 5.

• Pay attention to the locating point.

5 Screw

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

• Always replace.

6 Sensor Wheel

• For the engine speed sensor.

• Always replace.

• Removing and installing, refer to => [ Sensor Wheel ] Service and Repair.

7 Needle Bearing

Removing and installing, refer to => [ Crankshaft Needle Bearing ] Service and Repair.

8 Crankshaft

• If replacing the crankshaft, allocate the crankshaft bearing shells. Refer to => [ Main Bearing Shell Allocation ] Service and Repair.

• Before removing, observe the note at the top.

• Removing and installing the needle bearing. Refer to => [ Crankshaft Needle Bearing ] Service and Repair.

• Axial play:

New: 0.07 to 0.23 mm

Wear limit: 0.30 mm

• Check the radial clearance using Plastigage(R):

0.02 to 0.06 mm

Wear limit: 0.10 mm

• Do not rotate crankshaft when measuring the radial play.

• Crankshaft dimensions:

Crankshaft bearing: 59.958... 59.978 mm.

Connecting rod bearing: 53.958... 53.978 mm

• It is not permissible to rework the crankshaft.

9 Oil Spray Jet

• For crankshaft bearings 2 through 7.

• For piston cooling.

• Opening pressure:

2.0 bar pressure

• Removing and installing, refer to => [ Oil Spray Jet ] Service and Repair.