11 24 571 Replacing all connecting rod bearings (N57 Diesel)

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Special tools required:

00 2 590 .
00 9 120 .

IMPORTANT: Different connecting rod bearing shells.
Connecting rod and connecting rod bearing cap are different .
Replace connecting rod bolts.

Necessary preliminary tasks:

Remove all PISTONS .

IMPORTANT: Note grinding stages on crankshaft.

Insert one bearing shell for each connecting rod.

Connecting rod bearing (1) is for the connecting rod bearing cap.

Connecting rod bearing (2) is for the connecting rod.

Installation note:

Observe encoding of connecting rod bearing shells.

Fig 1: Identifying Connecting Rod Bearings

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Install piston with connecting rod.

Check connecting-rod bearing play.

Piston in BDC position.

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

Fig 2: Installing Piston With Connecting Rod

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Fit connecting rod bearing cap so that matching numbers match.

Fig 3: Identifying Connecting Rod Bearing Cap Numbers

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Both markings (anti-twist lock) on connecting rod big end (2) and on connecting rod (1) must point to each other.

Fig 4: Identifying Connecting Rod, Big End, And Markings

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IMPORTANT: Do not turn the connecting rods or crankshaft.

To check connecting-rod bearing play, use old connecting rod bolts.

Tighten down connecting rod bolts (1) with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Fig 5: Tightening Connecting Rod Bolts

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Unscrew connecting rod bearing cap.

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

Connecting-rod bearing play.

Remove Plastigage.

Fig 6: Measuring Radial Clearance

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Install new connecting rod bolts (1).

Join connecting rod bolts (1).

Tightening torque: 11 24 1 AZ .

Fig 7: Tightening Connecting Rod Bolts

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Mark all connecting rod bolts (1) with a colored mark (2) in the same axial direction.

Installation note:

See Fig 8.

Fig 8: Marking Heads Of Connecting Rod Bolts

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Secure connecting rod bolts (1) with special tool 00 9 120 .

Tightening torque: 11 24 1AZ .

Installation note:

Visually check connecting rod bolt connection.

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

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Assemble engine.