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>From: "John Cliff" <mx@crixbinfield.freeserve.co.uk>
>Subject: Europa-List: Older Exhaust
>
>I have got round to fitting an early XS exhaust system, made by Heggemann, p/n
25-00200. Among the bag of bits with it are two aluminium flanges, such as you
might use to connect ducting, though the flanges on these are formed to a saddle
shape to fit against a cylindrical object. The manual is silent on the purpose
of these and the inventory doesn't help. Can anyone tell me what these are
for ? (Fabricating a hot air duct using the shroud round the silencer [muffler]
perhaps ? )
>
Hi John,
I have a Heggeman muffler on my 912S/ XS installation. I also received
the parts you describe including the cylindrical aluminium sleeve which
surrounds the muffler and is retained by 2 large hose clips. I did not
use the saddle flanges but I assume they were provided to permit a hot
air supply from the cylindrical sleeve. I removed my cylindrical sleeve
since it was making contact with the top surface of the cooling duct.
>Also in the bag are 8 all-metal stiffnuts (repalce the manifold stiffnuts
>supplied
with the engine ?), a few 'pop' rivets and a couple of sachets of what appears
to be an exhaust-temperature assembly paste (no English labelling). Is the
exhaust system itself supposed to be assembled dry ? John Cliff #0259
>
I used the stiffnuts, they seem to work fine. I have no idea what the
pop rivets are for. I use the paste to prevent fretting at the 4
spherical joints and on the sliding sleeve on one of the down pipes. A
little paste goes a long way. The quality of the Heggeman muffler
appears to be good, mine is trouble free after 330 hours. Only problem
is that it is quite large. I had to put 2 'bump-outs' into the lower
cowling to accomodate the bottom corners. I have also noticed that the
spring end loops are being cut into by the sharp corners on the
attachment lug holes, I recommend you smooth these.
Finally, to prevent direct heat soak from the muffler causing
deterioration of the rubber oil return hose at the engine sump, I
installed a heat shield between the muffler and the base of the engine.
Since I have Graham Singleton's firewall kit, I used the polished
stainless sheet provided in the factory kit - it works well.
Cheers, John
N262WF, mono XS, 912S
Mooresville NC
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