Hi Jonathan
I hope your well? I have had many similar problems with the exhausts pipes
cracking,
around the area where the loops Are welded For the exhaust springs.
CKT have been very good and replaced some of my down pipes, with some
conversation
with Tim Piper at CKT about the problems he suggested having the down lipes
with the new spigot inserts attached, therefore the newest down pipes I received
have got these spigots attached to the ends which fit inside the exhaust
outlets on the heads, this is on the 2 rear down pipes. In my opinion with the
new spigots attached the downpipes sit better and i feel it helps removes some
strain and stress on the down pipes and hopefully reduces the possibility
of failure.
So far so good with mine now, although I havent done many flying hrs since
installing
them along with a new silencer which i had fail around the welds.
Kind regards
Donald
G-PUPY
Sent from my iPhone
> On 22 Aug 2022, at 19:54, JonathanMilbank <jdmilbank@yahoo.co.uk> wrote:
>
> After less than 50 hours since buying a replacement exhaust header tube from
CKT for #3 cylinder, it has cracked almost completely around at the level where
the loop attachments for the springs are welded on. Considering that this is
second time that such cracking occurs in the same location on both old and
replacement
tubes, it's reasonable to assume that it will happen repeatedly.
>
> This time I'll get the crack welded, but I anticipate that the crack will just
appear sooner than before, due to added welding stresses in the metal.
>
> The carburettors are electronically balanced, the Airmaster propeller is well
balanced and the engine supporting rubber dampers show no sign of sagging due
to age. The whole assembly flies as smoothly as ever.
>
> So who has similar problems with CKT exhaust systems and what has anybody done
previously to prevent cracking?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=507747#507747
>
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