11 25 671 Replacing Piston Rings On All Pistons (S62/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.
(Piston removed)
Remove piston rings with piston-ring compressing pliers.
NOTE:
It might not be possible to find the identification on used piston rings. Put aside piston rings in correct sequence and installation position.
Installation:
- Insert piston rings with the word "TOP" facing piston crown.
- Plain compression ring "TOP".
- Tapered compression ring "TOP".
- Slotted oil-scraper ring with rubber-lined spring.
Offset the contact points of the piston rings by approx. 120° to each other but do not position above the piston pin boss.
Measure axial play.
Axial clearance, refer to ENGINE - TECHNICAL DATA .
Measure end clearance.
End clearance, refer to ENGINE - TECHNICAL DATA .