Piston Outer Seal – Mopar (4659871)

Piston Outer Seal contains combustion in the cylinder bore and transfers force to the connecting rod. It is matched by bore diameter and ring groove width rather than by model year alone.

Replace the Piston Outer Seal when compression is low on one cylinder, when oil consumption climbs without an external leak, or when a teardown shows scoring in the bore. Measure the bore before ordering: standard size will not seal a cylinder that needs honing.

Ordering reference for the Piston Outer Seal is part number 4659871, categorised under Seals & O-Rings. Match that number against the component you are removing before you order.

Genuine MOPAR part for the Piston Outer Seal. Where the manufacturer has superseded a number, the current reference is the one that ships.

The listing covers the outer position of the assembly.