11 25 530 Removing And Installing/Replacing All Pistons (S54)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
(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.
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.
Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION:
The S54 engine has two types of conrod with different conrod bolts.
Differentiating Features:
- Conrod bolt with M11x1.25 thread.
Bolt head: bihexagonal 12 mm A/F.
- Conrod bolt with M10x1.25 thread.
Bolt head: Torx E12.
Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION:
The procedure for replacing the conrod bolts and the tightening specifications are different. Mixing up the procedure for replacing the conrods and conrod bolts and the tightening specifications will result in serious engine damage.
Removal And Installation:
Removal and installation of pistons and conrods with M11x1.25 conrod bolt and M10x1.25 conrod bolt are described separately.
Remove and install piston (M11x1.25 conrod bolt, refer to 11 25 530 REMOVING AND INSTALLING/REPLACING ALL PISTONS (S54 WITH M11X1.25 CONROD BOLT) .
Remove and install piston (M10x1.25 conrod bolt), refer to 11 25 530 REMOVING AND INSTALLING/REPLACING ALL PISTONS (S54 WITH M10X1.25 CONROD BOLT) .