11 24 571 Replacing all connecting rod bearings (N63)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

IMPORTANT: Note GRINDING STAGES ON CRANKSHAFT .

Necessary preliminary work:

Remove all PISTONS

Install new connecting rod bearing shells.

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

Install PISTON .

Fig 1: Identifying Bearing Shells

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Installation note:

The bearing shells on the connecting rod are coded.

Connecting rod bearing cap (1): the red bearing shell is fitted and the fastening notches are on the left and right sides of the bearing shell (see arrows).

Connecting rod (2): the blue bearing shell is fitted and the fastening notches are one side of the bearing shell (see arrows).

Fig 2: Identifying Notches In Bearing Shells

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Check connecting-rod bearing play.

Piston in BDC position.

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

Fit bearing caps so that matching numbers match up.

Fig 3: Identifying BDC Position

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IMPORTANT: Do not distort connecting rods or crankshaft.

Use connecting rod bolts to check connecting-rod bearing play.

Connecting rod bolts with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Fig 4: Securing Connecting Rod Bolts Using Special Tool 00 9 120

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

CONNECTING-ROD BEARING PLAY .

Remove plastic thread.
Lubricate crankshaft and bearing shells.
Install new connecting rod bolts.

Fig 5: Checking Bearing Play
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Secure connecting rod bolts with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Fig 6: Securing Connecting Rod Bolts Using Special Tool 00 9 120

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.