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Old 06-10-2012, 06:49 AM   #15
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PeterH-Airstreamer's Avatar

1997 30' Excella
Austin , Texas
Join Date: Feb 2002
Posts: 3,483
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Originally Posted by Surprise View Post
I was looking through some old paperwork from Airstream and found a letter admitting that on the passenger-side exhaust manifold there was a design flaw that caused the exhaust manifold gasket and doughnut gasket to fail prematurely! This flaw being the Steel Panel in the wheel-well blocking airflow and essentially trapping the hot air. This is for the 310/454ci varient. I'm sure other models as well!
I'm considering notching out a piece of this panel and bending it out to funnel some air to this area. Just thought I'd add my own observation!
I suppose that is why they started to add the vents at the wheel well around 85/86
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1996 Airstream B190
1987 29' Sovereign Trailer
1997 30' Excella Trailer
AIR #13
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Old 06-10-2012, 07:46 AM   #16
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raveson's Avatar
1989 34.5' Airstream 345
boca raton , Florida
Join Date: Aug 2006
Posts: 286
Welcolm to the fourms!
Over the years the fourms community of classic MHs have been a great place to share info on all kinds of repairs. I,m sure you have much to share.

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Old 06-10-2012, 08:28 AM   #17
3 Rivet Member
1988 25' Excella
Trumbull , Connecticut
Join Date: Oct 2010
Posts: 192
GMC 454 Manifolds

I have a 1989 GMC 3500 dually that is on it's 4th set of exhaust manifolds.
I also have a 2005 Chevy 2500 HD that is on it's 2nd set of exhaust manifolds.
The 454 bolts could all be removed without breaking but the Chevy has a reputation of bolts breaking and exactly half had to be drilled out.
Happy Camping nm1oqrz
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Old 06-10-2012, 10:14 AM   #18
2 Rivet Member
1979 28' Airstream Excella 28
Commerce , Michigan
Join Date: Jun 2012
Posts: 30
When i did mine i drilled the mounting holes out to. 437 and used grade 8 12 point bolts with hardened tooling washers and thick copper gaskets ----no problems since in 8 years. When i go to headers ill cut the flanges between the pipes for a little compliance --- works well on the test stand engines at work.
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Old 06-13-2012, 06:45 PM   #19
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1995 36' Classic 36
Ludington , Michigan
Join Date: May 2011
Posts: 1,418
Originally Posted by Bruce B View Post
Welcome to the forums!

It seems by your post that you have an understanding of mechanical things, good!

Very good indeed. I tell people that there are some very good deals on these older classics but if you can't do the work yourself, they will eat you alive!

If my frig ever fails, it will be replaced with a conventional and inverter.

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