My guess would be valve guides. Clearances change during warm up. You may
have a case where when the engine is cold, the oil is too thick to go
between the guide and valve stem. After a few minutes the oil thins out,
and you get smoke. Then as the engine gets to full warm, the clearances
tighten to the point that no more oil.
If it were valve guides surely it
> would get worse as the engine gets hotter. If it's oil control rings I
> figure we would see oil smoke when driving. This is only when idling and
> only as it starts to warm up. Not when cold (first started) and not when
> hot
> (after a drive). It seems to start as the temperature begins to rise on
> the
> gauge.
>
> If it were dashpot oil it would have all gone by now I would have thought.
> What else might be the source/cause? We are all flummoxed here.
>
> Any ideas? All suggestions gratefully received.
>
> Regards
> _______________________________________________
> (______________ Alan Bromfield _______________)
> (______ \____1957-BN4 ___/ _______)
> (_________________________)
> http://www.nfahc.co.uk
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