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Subject: Re: Exhaust leaks
From: "Greenbacks, UnLtd." <N4ZQ@VERIZON.NET>
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Date: Wed, 07 Aug 2013 08:31:34 -0400
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To: "Lancair Mailing List" <lml@lancaironline.net>

=46rom trolling through the archives, I note several references to =
exhaust gases leaking by slip joints.
My engine is a Lycoming IO360 180hp and the exhaust system came from =
Lancair. At 44hrs I removed my cowl for various inspections and
for the first time was surprised to see evidence of exhaust soot on the =
lower right cowl area. There is little to no discoloration due to heat, =
just grey, blackish soot and not much. The location is about 23" forward =
of the firewall and offset about 8" to the right of center. My first =
thought was that the heat muff was suspect, but no. This condition was =
not noticeable at the 25hr oil change. All four pipes are fine, no =
cracks, etc. But there is clearly some leakage at the slip joints where =
the pipes crossover from right to left. My local A&P says this is =
typical but my skepticism grows with age. I've read and heard negative =
comments about coating exhaust pipes inside or out.=20
Is there anything more to do other than keep an eye on this situation?

Thanks,

Angier Ames=20
N4ZQ
44hrs=