11 25 530 Removing and installing or replacing all pistons (M52/S52/M52TU/M54/M56): Removal

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.

Removal of pistons is described separately from installation.

Assembly sequence for removal and installation is different.

IMPORTANT: Re-install piston, connecting rod and bearing shells back in the same position and in the same installation location.

Connecting rods and bearing covers are designated with the same pair number: do not mix them.

Remove oil pump, refer to 11 41 000 REMOVING AND INSTALLING/REPLACING OIL PUMP (M52TU/M54/M56) .

If oil pump and oil scraper are two parts:

Remove oil scraper.

Fig 1: Removing Oil Scraper

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NOTE: Illustration shows crankshaft removed.

On engines with spray nozzles for piston cooling on cylinder underside:

Fig 2: Identifying Engines Spray Nozzles

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IMPORTANT: When removing and installing pistons, make sure the piston cooling spray nozzles are not damaged.

Installation:

Screw threads are coated with screw securing adhesive (Loctite). Replace screws.

In event of heavy oil carbon residue:

Carefully remove oil carbon residue from cylinder wall.

Fig 3: Removing Oil Carbon Residue From Cylinder Wall

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Unscrew conrod bearing cover.

Fig 4: Removing Conrod Bearing Cover

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Insert special tool 11 3 480 in conrod.

Fig 5: Fit Special Tool To Conrod

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Remove conrod with piston from cylinder head side.

Lift out retaining ring and press out piston pin.

IMPORTANT: Piston and piston pin are paired and must not be fitted individually.

Fig 6: Removing Piston Pin Retaining Ring

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