11 25 530 Removing and installing/replacing all pistons (S54): Notes

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

IMPORTANT: The S54 engine is equipped with M10x1.25 and M11x1.25 conrod bolts. Note all differences and do not interchange them. Refer to 11 24 571 Replacing all conrod bearings (S54) .

Special tools required:

00 2 590
00 9 120
11 2 050
11 3 480
11 9 120

For identification of special tools, refer to ENGINE- SPECIAL TOOLS .

(engine removed)

Fit engine to special tool 00 1 450.

Removing cylinder head
Removing oil pan
Removing oil pump

CAUTION: Re-install piston, conrod and bearing shells back in the same position and in the same installation location.
Conrod and conrod bearing cover are designated with same pair number: do not interchange / confuse.

In event of heavy oil carbon residue:

Carefully remove oil carbon residue from cylinder wall.

Fig 1: Removing Oil Carbon Residue From Cylinder Wall

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Piston cooling spray nozzles are installed between the bearing seats.

Check spray nozzles for damage.

If necessary, remove piston-cooling spray nozzles.

Fig 2: Identifying Piston Cooling Spray Nozzles

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: The S54 engine has two types of conrod with different conrod bolts.