On my pickup the flange off the exhaust manifold is connected to the rest of
the system via a two triangle flanges held together with spring loaded bolts
and between is a donut consisting of a steel mesh covering fiberglass.
According to the dealer who had to install a replacement it was there to
handle the twist of the engine against the fixed exhaust components.
David A. Templeton
Open Text Corp.
Waterloo, ON
Canada
WebSite: http://trandmustang.homestead.com
'74 Triumph SpitSix
'66 Ford Mustang (Wife's)
'59 Triumph TR3a (Project)
'99 GMC Safari
'95 GMC K2500 Sierra
----- Original Message -----
From: <alemen@pop.ftconnect.com>
To: <spitfires@autox.team.net>
Sent: Thursday, July 06, 2000 11:39 AM
Subject: Re: Weld Breaks on SS Headers
>
> Doug, I have seen sections of pipe that looked like that may be flexible
in an auto parts store. Only thing is they looked pretty long (about 6
feet). Never looked to see if they have shorter section though. They did
have the correct "bellows" type shape. Probably in mild steel though. I'll
look next time I am in.
>
> When I fit a new exhaust and header I would like to make sure that I don't
get cracks as well.
>
> I would have thought that a muffler shop would have something universal
that they use in various diameters.
>
> Alan
>
>
>
> Original Message:
> -----------------
> From: Douglas Braun & Nadia Papakonstantinou dougnad@bellatlantic.net
> Date: Thu, 06 Jul 2000 11:16:08 -0400
> Subject: Re: Weld Breaks on SS Headers
>
>
>
> I wish I could find a decent flex-joint that I could add to
> my exhaust. Any leads, anyone? At one point, I had
> a foot-long section of that cheesy spiral-wound flexible pipe
> between the header and the main pipe, but it fell apart after
> a couple of years.
>
> If you look at the geometry of headers and how they attach to
> the engine, you will see that a rigid header+pipe setup
> can apply very high forces to the flanges, studs, etc...
>
> Doug Braun
> '72 Spit
>
> At 10:31 AM 7/6/00 -0400, Teller.John@orbital.com wrote:
>
>
>
> >My miserable 1985 Buick Somerset with a 2.5L 4 (completely unbalanced
mind you)
> >came from the factory with a welded together stainless steel manifold.
After
> >175K miles, it is doing just fine.
> >
> >The manifold is connected to the rest of the exhaust system through a
flexible
> >coupling consisting of a flange on the cat pipe and another on the
manifold with
> >a "doughnut" between them, all held together by two spring loaded bolts.
> >Perhaps the flexible coupling is what keeps the stiffer stainless from
breaking
> >its welds.
> >
> >Most of the vehicles in the Import Car Tuning magazines at the grocery
store use
> >a fancy flexible coupling between their SS headers and the rest of the
exhaust
> >system. Probably for that very reason!
> >
> >--- JST
>
>
>
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