11 24 571 Replacing all connecting rod bearings (M52 / S52 / M52TU / M54 / M56)

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - Z3 .

Special Tools Required:

00 2 590
00 9 120
11 2 110

(Piston removed)

Important!

Note grinding stages on crankshaft. Refer to CRANKSHAFT WITH BEARING .

Install new conrod bearing shells. Refer to 11 24 571 REPLACING ALL CONNECTING ROD BEARINGS (M52 / S52 / M52TU / M54 / M56) .

Insert one blue (1) and one red (2) bearing shell (irrespective of the color coding on the conrod shaft).

Fig 1: Inserting One Blue And One Red Bearing Shell

Courtesy of BMW OF NORTH AMERICA, INC.

Install piston. Refer to 11 25 530 REMOVING AND INSTALLING OR REPLACING ALL PISTONS (M52 / S52 / M52TU / M54 / M56) .

Check conrod 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 2: Fitting Bearing Caps By Pair Numbers

Courtesy of BMW OF NORTH AMERICA, INC.

Important!

Do not distort conrods or crankshaft.

Use the old conrod bolts to check conrod clearance.

Tighten down conrod bolts with special tool 00 9 120 or with special tool 11 2 110.

Tightening torque, refer to 11 24 1AZ in CONNECTING RODS AND BEARING .

Fig 3: Tightening Conrod Bolts With 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.

Fig 4: Reading Bearing Play At Width Of Flattened Plastic Thread With Assistance Of Measurement Scale

Courtesy of BMW OF NORTH AMERICA, INC.

Conrod bearing clearance. Refer to CRANKSHAFT WITH BEARING .

Remove plastic thread.
Coat crankshaft and bearing shells with oil.
Install new conrod bolts and tighten down.

Tightening torque, refer to 11 24 1AZ in CONNECTING RODS AND BEARING .