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Replacing Valve Stem Seals

Model: Audi A6 MK 2, C5 - Years 1997-2004
Part: Valve

The so-called valve stem seals are actually oil seals: they allow the valve stem to move, enabling it to open and close without oil entering the combustion chamber. When overhauling a cylinder head, it is always advisable to replace them. Replacing these seals requires a special arch clamp to compress the valve return spring and release the retainers that secure the stem to the retainer. At this point, you can remove the valve, the old oil seal, and install the new one after thoroughly lubricating it with clean oil.

Updated on 13 February 2026 by ScegliAuto

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