For years we have used copper slip on the flexible joint on Rotax exhausts.
It works a bit but I suspect what ever you do it will still be difficlult
to seperate next time.
Jerry
----------
> From: Klaus Dietrich <101613.3377@compuserve.com>
> Cc: Paul Marshall <paul.marshall@bae.co.uk>
> Subject: Re: exhaust pipe "failures"
> Date: 25 October 1997 12:02
>
> Paul,
>
> Thanks for your offer to inspect burnt through exhaust pipe.
> I am certainly willing to send you my pipe which is an "good" example. It
> has a 5 cm long crack just in the bent radius and the steel it self
"peels"
> like an onion along the first 20 cm ....(it looks like "Strudelteig" or
> "milles feuilles"....) In my opinion this is a clear sign of bad quality
> steel or of badly " rolled" steel.
>
> It is true that I had ThermoTec lagging on it up to the engine.
Apparently
> ThermoTec is silica based and when heated above a certain temp it will
make
> mild steel corrode - as some expert told us recently in this forum;
however
> I don't think that's the only reason as the pipes of my friend's Europa
> also starts "peeling" after 40 hours with no Thermo-Tec on them.
>
> I just received my new Exhaust systems from Europa and now also the main
> exhaust/silencer is in mild steel (the previous one was still stainless
> steel). Even new, there are already signs of corrosion all over .... so
I
> am wondering how long this one will last !
>
> When mounting the tubes together I am wondering if I shall put some high
> heat resistance Molybdenum grease or similar so the next time I can
> disassemble the tubes from the main silencer box. Any suggestions?
>
> Paul, could you please give me your address so I can send the pipe to
you.
>
> Thanks and best regards
>
>
> Klaus
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