11 24 571 Replacing all connecting rod bearings (N63 hybrid)

Special tools required: 

• 00 2 590
• 00 9 120

Necessary preliminary tasks:

• 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 .

Installation: 

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 in illustration).

Connecting rod (2): the blue bearing shell is fitted and the fastening notches are one side of the bearing shell (see arrows in illustration).

Check connecting rod bearing clearance. 

Piston in BDC position.

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

Fit bearing caps so that pair numbers match up.

Use connecting rod bolts to check connecting rod bearing play.

Connecting rod bolts with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Remove bearing cap and read off bearing play at width of flattened plastic thread with assistance of measurement scale.

CONNECTING-ROD BEARING PLAY.

• Remove plastic thread.
• Lubricate crankshaft and bearing shells.
• Install new connecting rod bolts.
  Fig 5: Measuring Connecting-Rod Bearing Play

  Courtesy of BMW OF NORTH AMERICA, INC.

Secure connecting rod bolts with special tool 00 9 120 .

Tightening torque 11 24 1AZ .

Assemble engine.