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 .

Fig 1: Locating Connecting Rod Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 2: Locating Connecting Rod And Bearing Cap Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 3: Locating Connecting Rod Cap Groove

Courtesy of BMW OF NORTH AMERICA, INC.

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 4: Tightening Connecting Rod Bolts Using Special Tool (00 9 120)

Courtesy of BMW OF NORTH AMERICA, INC.

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 .

Fig 6: Tightening Connecting Rod Bolts Using Special Tool (00 9 120)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.