11 24 571 Replacing all connecting rod bearings (M52 / S52 / M52TU / M54 / M56)

Special tools required: 

• 00 2 590
• 00 9 120
• 11 2 110

(piston removed)

Install new conrod bearing shells.

Insert one blue (1) and one red (2) bearing shell (irrespective of the color coding on the conrod shaft).

Install piston.

Check conrod bearing clearance.

Piston in BDC position.

Fit special tool 00 2 590 (Plastigage Type PG 1) to oil-free crankshaft.

Fit bearing caps so that pair numbers match up.

Use the old conrod bolts to check conrod clearance.

Tighten down conrod bolts with special tool 00 9 120 or with special tool 11 2 110.

Tightening torque, refer to 11 24 1AZ in ENGINE - TIGHTENING TORQUES .

Remove bearing cap and read off bearing play at width of flattened plastic thread with assistance of measurement scale.

Conrod bearing clearance.

• Remove plastic thread.
Fig 4: Removing Plastic Thread
Courtesy of BMW OF NORTH AMERICA, INC.
• Coat crankshaft and bearing shells with oil.
• Install new conrod bolts and tighten down.

Tightening torque, refer to 11 24 1AZ in ENGINE - TIGHTENING TORQUES .