11 25 671 Replacing piston rings on all pistons (S62 / S54)

WARNING: This page is about a different car, the 2003 BMW Z8, 2002 BMW Z8, 2001 BMW Z8, and 2000 BMW Z8. 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.

Fig 1: Removing Piston Rings

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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

Fig 2: Identifying Piston Rings

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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.

Fig 3: Measuring Axial Play

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Axial clearance. Refer to 11 25 PISTONS WITH RINGS AND PINS S62 .

Measure end clearance.

Fig 4: Measuring End Clearance

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End clearance, refer to 11 25 PISTONS WITH RINGS AND PINS S62 .