Reply To: Valve Stem Seals

Hi Nigel,

I have done 4 engine rebuilds in the last 10 years including one 6 cylinder. When the heads are being reconditioned I have new valve guides made which take the modern “top hat” seals. None of these engines use a drop of oil. Having said that I have also built engines with the old type seals and these have not used oil.

You have not said if the bottom of the engine has been rebuilt, if not it could be worn bores or a broken oil control ring, a cylinder leakage test may help to identify the cause before a complete strip down.

Good luck Philippe