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

Special tools required:

(piston removed)

IMPORTANT: Note grinding stages on crankshaft. Refer to ENGINE - TECHNICAL DATA .

Install new connecting rod bearing shells.

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

Fig 1: Inserting Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

Check connecting rod bearing clearance.

Piston in BDC position.

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

Fig 2: Fitting Special Tool To Oil -Free Crankshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Fit bearing caps so that pair numbers match up.

IMPORTANT: Do not distort connecting rods or crankshaft.

Use the old connecting rod bolts to check connecting rod clearance.

Fig 3: Tightening Down Connecting Rod Bolts With Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque 11 24 1AZ. Refer to ENGINE - TIGHTENING TORQUES .

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

Fig 4: Measuring Bearing Play

Courtesy of BMW OF NORTH AMERICA, INC.

Connecting Rod bearing clearance, refer to ENGINE - TECHNICAL DATA .

Remove plastic thread.
Coat crankshaft and bearing shells with oil.
Install new connecting rod bolts and tighten down.
Tightening torque 11 24 1AZ. Refer to ENGINE - TIGHTENING TORQUES .