11 24 571 Replacing all connecting rod bearings (S65)

WARNING: This page is about a different car, the 2011 BMW M3, 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.

IMPORTANT: Note grinding stages on crankshaft . See TED-TED-TDMUC1121-S65-01B1S2 CRANKSHAFT AND BEARINGS S65 or TED-TED-TDMUC1121-S65-01B1S1 CRANKSHAFT AND BEARINGS S65 .

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 Bearing Shell

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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: Identifying Bearing Caps Position

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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 TORQUE ANGLE MEASURING DIAL .

Tightening torque: 11 24 1AZ .

Fig 3: Tightening Connecting Rod Bolts Using Special Tool (00 9 120)

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

Conrod bearing clearance: Refer to TECHNICAL DATA .

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

Tightening torque: 11 24 1AZ .

Fig 4: Locating Bearing Clearance At Width Of Crushed Plastic Thread (Plastigage)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.