11 24 571 Replacing all connecting rod bearings (S65)

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 9 120

See MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

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

Necessary preliminary tasks:

Remove all pistons .

Install new conrod bearing shells.

Installation:

Install one blue (1) and one red (2) bearing shell in each conrod.

Install all pistons .

Fig 1: Identifying Blue And Red Bearing Shell In Conrod

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check connecting rod bearing clearance.

Piston in BDC position.

Place special tool 00 2 590 (Plastigage model PG 1) on oil-free crankshaft.

Place bearing caps in position, making sure that matching numbers are paired.

Fig 2: Checking Connecting Rod Bearing Clearance

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not distort connecting rods or crankshaft.

Use the old conrod bearing bolts to check conrod clearance.

Tighten down conrod bolts with special tool 00 9 120 .

Tightening torque: 11 24 1AZ . See 11 24 CONNECTING RODS AND BEARINGS .

Fig 3: Tightening Down Conrod Bolts With Special Tool (00 9 120)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove conrod bearing cap and read off bearing clearance at width of pinched plastic thread on measuring scale.

Conrod bearing clearance: Refer to ENGINE - TECHNICAL DATA .

Remove plastic thread.
Lubricate crankshaft and bearing shells.
Install new conrod bolts and tighten down.

Tightening torque: 11 24 1AZ . See 11 24 CONNECTING RODS AND BEARINGS .

Fig 4: Checking Bearing Clearance At Width Of Pinched Plastic Thread On Measuring Scale

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.