11 21 500 Replacing crankshaft (M52/S52/M52TU/M54/M56)

WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.

Engine removed, refer to 11 00 050 REMOVING AND INSTALLING ENGINE (M52/S52/M52TU/M54) .

Necessary preliminary tasks:

Removing cylinder head, refer to 11 12 100 REMOVING AND INSTALLING/REPLACING CYLINDER HEAD (M52TU/M54/M56) .
Removing lower timing case cover, refer to 11 14 110 REMOVING AND INSTALLING LOWER TIMING CASE COVER (M52/S52/M52TU/M54) .
Removing all pistons, refer to 11 25 530 REMOVING AND INSTALLING OR REPLACING ALL PISTONS (M52/S52/M52TU/M54/M56) .
Remove end cover at rear; this operation is described in 11 14 151 REPLACING CRANKSHAFT RADIAL SEAL (TRANSMISSION SIDE) .

Checking axial clearance:

If permitted end float is exceeded, check crankshaft, guide bearing shells and engine block, replacing if necessary, end float. Refer to 11 21 Crankshaft and Bearings M54 in ENGINE - TECHNICAL DATA .

Fig 1: Checking Axial Clearance

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Unfasten screw connection on reinforcement plates.

Fig 2: Removing Reinforcement Plates

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NOTE: The reinforcement plates are not fitted on engines with gray cast iron engine blocks or on engines with oil pumps integrated in oil scrapers.

Unfasten screw connection on main bearing.

Remove main bearing caps (1 to 7).

Lever out crankshaft.

Fig 3: Identifying Main Bearing Caps

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If necessary, release incremental gear.

Installation:

Replace screws.

Install screws and tighten down in two passes.

Tightening torque, refer to 11 21 1AZ in ENGINE MECHANICAL - TIGHTENING TORQUES - 530I (E39) .

IMPORTANT: Check grinding stage of crankshaft, refer to 11 21 Crankshaft and Bearings M54 in ENGINE - TECHNICAL DATA .

Fig 4: Checking Grinding Stage Of Crankshaft

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Replace main crankshaft bearing shells, refer to 11 21 531 REPLACING ALL MAIN CRANKSHAFT BEARING SHELLS (M52/S52/M52TU/M54/M56) .

Replace conrod bearing shells, refer to 11 24 571 REPLACING ALL CONNECTING ROD BEARINGS (M52/S52/M52TU/M54/M56) .

Replace grooved ball bearings in crankshaft, refer to 11 21 571 REPLACING GROOVED BALL BEARING IN CRANKSHAFT (M52/S52/M52TU/M54/S50/S54) .