11 24 571 Replacing all connecting rod bearings (N63)

Special tools required: 

• 00 2 590 .
• 00 9 120 .

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 Blue Bearing Shell And Red Bearing Shell

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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: Locating Fastening Notches On 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: Installing Special Tool (00 2 590) To Oil-Free Crankshaft

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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: Measuring Radial Clearance

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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)

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Assemble engine.