11 25 530 Removing and installing/replacing all pistons (N62): Removal

WARNING: This page is about a different variant/trim than selected.

Removal of pistons is described separately from installation.

Assembly sequence for removal and installation is different.

Mount engine on assembly stand.

Remove both cylinder heads. See Cylinder Head With Cover .

Unscrew oil sump.

Remove oil pump.

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

Conrods and conrod bearing caps are denoted with the same pairing letters, do not mix them up.

In event of heavy oil carbon residue:

Carefully remove oil carbon residue from cylinder wall.

Fig 1: Removing Oil Carbon Residue From Cylinder Wall

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Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: When removing and installing pistons, make sure piston cooling spray nozzles (1) are not damaged.

Fig 2: Identifying Piston Cooling Spray Nozzles

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Courtesy of BMW OF NORTH AMERICA, INC.

Remove connecting-rod cover.

NOTE: Conrods and conrod bearing caps are denoted with the same pairing letters.

Set down conrod bearing caps in order.

Fig 3: Removing Connecting-Rod Cover

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Courtesy of BMW OF NORTH AMERICA, INC.

Insert special tools 11 8 151 and 11 8 152 in conrod.

Remove connecting rod with piston from cylinder-head side.

Fig 4: Inserting Special Tools 11 8 151 And 11 8 152 In Conrod For Removing Connecting Rod

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Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Piston and piston bolts are paired and must not be fitted individually.

Lift out retaining ring and press out piston pin.

Fig 5: Lifting Out Retaining Ring And Pressing Out Piston Pin

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Courtesy of BMW OF NORTH AMERICA, INC.