11 24 571 Replacing all connecting rod bearings (N63)

Special tools required:

IMPORTANT: Note grinding stages on crankshaft. See N63 ENGINE .

Necessary preliminary work:

Removing 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 PISTONS .

Fig 1: Identifying Connecting Rod Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

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 in illustration).

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

Fig 2: Identifying Notches In Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

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: Matching Connecting Rod Cap With Connecting Rod

Courtesy of BMW OF NORTH AMERICA, INC.

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 5: Reading Connecting Rod Bearing Radial Clearance Using Plastigage

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CONNECTING-ROD BEARING PLAY .

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

Secure connecting rod bolts with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Fig 6: Tightening Connecting Rod Bolts Using Special Tool (00 9 120)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.