BMW 7 Series: Connecting Rod With Bearing

REPLACING ALL CONNECTING ROD BEARINGS (N63)

Notes

IMPORTANT: Note grinding stages on crankshaft.

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 PISTON.

Fig. 148: Identifying Blue Bearing Shell And Red Bearing Shell

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. 149: Locating Red Bearing Shell Fastening Notches And Blue Bearing Shell Fastening Notches

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. 150: Locating Special Tool 00 2 590

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. 151: Checking Connecting-Rod Bearing Play

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. 152: Checking Connecting-Rod Bearing Play

Secure connecting rod bolts with special tool 00 9 120.

Tightening torque 11 24 1AZ.

Fig. 153: Securing Connecting Rod Bolts With Special Tool 00 9 120

Assemble engine.

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