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

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Special tools required:

NOTE: For special tools, refer to ENGINE - SPECIAL TOOLS .

00 2 590
00 9 120
11 2 110

(piston removed)

IMPORTANT: Note grinding stages on crankshaft.

Install new conrod bearing shells.

Fig 1: Installing New Conrod Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 2: Fitting Bearing Caps So That Pair Numbers Match Up

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not distort conrods or crankshaft.

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 .

Fig 3: Tightening Down Conrod Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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 .