11 24 571 Replace all connecting rod bearings (M57T2-SCR)

Necessary preliminary work:

IMPORTANT: The connecting rod bearing shells for the connecting rod and the connecting rod bearing cap are different.
Replace connecting rod bolts.

Install the normal connecting rod bearing shell (low version red) in the connecting rod bearing cap.

Fig 1: Identifying Normal Connecting Rod Bearing Shell

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Install the more wear-resistant "S" connecting rod bearing shell (high version blue) in the connecting rod.

Fig 2: Identifying Wear-Resistant "S" Connecting Rod Bearing Shell

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Insert one blue and one red bearing shell for each connecting rod (irrespective of the colour coding on the connecting rod shaft).

IMPORTANT: Note grinding stages on crankshaft.

Fig 3: Locating Bearing Shell Of Connecting Rod

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Install piston.

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 4: Locating Bearing Caps Matching Numbers

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IMPORTANT: Do not turn the connecting rods or crankshaft.

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

Tighten down connecting rod bolts with special tool 00 9 120.

Tightening torque, see 11 24 1AZ in CONNECTING RODS AND BEARINGS .

Fig 5: Tightening Connecting Rod Bolt Using Special Tool (00 9 120)

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Remove bearing caps.

Read off bearing clearance at width of crushed plastic thread (Plastigage) with aid of measuring scale.

Connecting-rod bearing play.

Remove plastigage.

Fig 6: Locating Bearing Clearance Reading On Crushed Plastic Thread (Plastigage)

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Overview:

Colour code/shaft diameter/bearing strength

Rt = red

Bl = blue

Fig 7: Identifying Bearing Clearance

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Assemble engine.