Simon
My wife's car is not as grand as a Porsche, in fact a Rover 25, but we
have had similar problems.
The test is to lay a wheel flat and run a little water around the tyre
to rim joint on both the inside and then the outside. If there are
slight bubbles appearing then the rim to wheel seal is suspect. Ours had
corrosion of the aluminium that would no longer allow a good seal.
We tried a fancy sealant from a good tyre outlet but the cure did not
last.
We ended up replacing all the wheels as a set. Luckily Halfords were
selling a full set with tyres at a very good discount because they were
not 'boy racer' enough.
I suspect that you will just have to 'bite the bullet'.
regards
>
>I have a Porsche 944 S2. It's a nice car but no Healey.
>
>So...despite having 4 new tyres, I continually lose pressure on 3 of the 4
>corners. My guess was that the seal between tyre and wheel was not sound and
>that a good clean up would solve it. My tyre man, who is good, tells me that
>my wheels - the original Porsche ones - are getting porous..that the
>aluminium lets air through.
>
>Have you heard of such a thing? It sounds possible to me.
>
>Is there a cure? Some goo that one paints on to the wheel's inner surface
>perhaps.
>
>Thanks,
--
John Harper
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