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

Special tools required: 

• 00 2 590
• 00 9 120

Necessary preliminary tasks: 

• Removing all PISTONS 

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

Fig 1: Identifying Normal Connecting Rod Bearing Shell (Low Version Red)

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

Fig 2: Identifying Connecting Rod Bearing Shell (High Version Blue)

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

Fig 3: Locating Stages On Crankshaft

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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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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: 11 24 1AZ .

Fig 5: Tightening Down Connecting Rod Bolts With 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. See 1124 CONNECTING RODS AND BEARINGS (M57T2/TOP/SCR/D30) .

Remove Plastigage.

Fig 6: Checking Connecting-Rod Bearing Play

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Overview:

Color code/shaft diameter/bearing strength

Rt = red

BI = blue

1. Crankshaft journal
2. Bearing clearance
3. Bearing shells: red or blue
4. Connecting rods
   Fig 7: Identifying Color Code/Shaft Diameter/Bearing Strength

   Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.