Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Wed, 10 Sep 2008 21:24:02 -0400
Message-ID: <redirect-3123592@logan.com>
From: Lorn H Olsen <lorn@dynacomm.us>
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Subject: Re: Exhaust system for 0-320

Jim,

The only mount that I have is where the exhaust manifold attaches to  
the engine. At my last annual inspection, the AP said that I needed to  
brace the exhaust. I have no braces and the exhaust has never cracked.  
I am not going to fix what is not broken.

The 2 ends of the exhaust are pretty free to move so I wrapped then  
with insulating tape and a hose clamp. They are only attached to  
themselves, not to the engine mount or any other bracket.

I used to wrap the exhaust with insulating tape. About 5 years ago I  
had the exhaust ceramic coated (don't coat the heat muff area). Now,  
the exhaust is cool to the touch right after engine shut down.

Lorn

> From: "Gigliotti, James M CTR USA" <james.gigliotti@us.army.mil>
> Date: September 9, 2008 7:40:09 PM GMT-04:00
>
> Hello again folks-
> About the cracks in my exhaust system, my A/P mechanic suspects that  
> wrapping my exhaust system in exhaust manifold insulating tape  
> (which I did after the first time we had to remove the system to  
> weld some cracks) may have contributed to embrittlement of the  
> system.  Any comments on this?  Are any of you wrapping your systems  
> to reduce heat radiation in your cowl area?  How much should I  
> expect for my system?  Is it normal to have to remove the system  
> every year to weld cracks?
>
> Thanks,
>
> Jim Gigliotti
>
> Lancair 320, 400 hrs.
> Dothan Alabama
>
--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,470 hrs, N31161, Y47, SE Michigan