Check connecting-rod bearing play

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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 1: Locating Special Tool 00 2 590

Courtesy of BMW OF NORTH AMERICA, INC.

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 2: Checking Connecting-Rod Bearing Play

Courtesy of BMW OF NORTH AMERICA, INC.

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 3: Checking 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 4: Securing Connecting Rod Bolts With Special Tool 00 9 120

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.