exhaust gasket materials....
- Thread starter dogdog
- Start date
dlcwent
Member Emeritus
3m puts out a exhaust sealer. Works very well. Available at NAPA and Advance and probably all auto parts stores.
ok maybe this would help....
the flange the gasket fits to that is on the vehicle is a little warped think I put too much heat to it when I weld it. so needed a thicker gasket.
The original gasket is a little under the weather and leaks... So I cut out about 10 of the same shape from those thin aluminum sheets from those roofing things.
The question is what do you use to glue them together, since I don't have a stamp or die to make that ridge for a crush fit thinggy.
The pic to the right is the unused stainless flange to the left is the 10 gasket.....
The exhaust paste seems to be dry hard, would those high temp silicon work ?
the flange the gasket fits to that is on the vehicle is a little warped think I put too much heat to it when I weld it. so needed a thicker gasket.
The original gasket is a little under the weather and leaks... So I cut out about 10 of the same shape from those thin aluminum sheets from those roofing things.
The question is what do you use to glue them together, since I don't have a stamp or die to make that ridge for a crush fit thinggy.
The pic to the right is the unused stainless flange to the left is the 10 gasket.....
The exhaust paste seems to be dry hard, would those high temp silicon work ?
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joe49
Well-known member
Copper is better. The aluminum will not last as long.
TheEquineFencer
Well-known member
You might think about after you weld it, putting it on a large belt sander and getting it flat again. The local community college near me has one they use for cylinder heads. When I need one done, I stop by there for a visit. Every once in awhile I'll buy the instructor lunch. It's cheaper and more fun than taking it to a machine shop.
I did it for the fun factor, and and yes, I tried sanding the warped flanges on the (6x48) belt sander, .... those blue belts 80 grid took forever, closest I could get it still seems a little warped. at least no rust on the pipes.... it had one of those graphite gaskets gaskets plus a thin aluminum gasket lasted about 2 years. I forgot where I got that gasket from but making it is more fun. As far as resource wise, no such luxury here, I am not working in any of the industries, so it's either I buy pre-made or buy the tool and DIY.... Figure some one here must have know a thing or two about making metal gaskets what do you use to glue / weld those multi-layer metal gaskets together. Could not find much info on the web either , maybe my googlefu is not as good.
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Not sure where I could source a soft copper sheet somewhere..... not much choices here for me, it's HD or Lowes that is about it I know here.... metal yards probably flip me the fingers trying to buy a small sheet of copper.
WILD-BILL
Well-known member
High temp RTV is all I ever use anymore when I install the headers on the race cars.
Everything else I used would lose torque and leak.
Everything else I used would lose torque and leak.
The permatex item 81160 high temo rtv is what I have left over from the thermostat and coolant flange installation.... but it's rated only at 600F continuous... not sure if this can be used close to the header part.... isn't those exhaust temp are suppose to be 1400F ( from google )?
mark18mwm
Well-known member
X 2 of what Wild-Bill said. After years of buying and blowing out header gaskets on my race car I started using hi-temp silicone also. lasted longer then any header gasket I ever bought.
joe49
Well-known member
Yep, I've seen many guys use Copper RTV.
WILD-BILL
Well-known member
Yep, That's the stuff. Been using it alone to seal the headers to the heads for years now.
Exhuast gas temps can get up there. I know the EGT's on both my girls Jrs and my big car are around the 1100-1200 deg range but I doubt the flange or the head are getting that hot.
Ok, let me give that high temp RTV a try then, since I already have it in stock and the aluminum gaskets are already cut. Worse case it would be another fun weekend projects , hopefully in the warmer months.
Thx all, Happy Holidays / Xmas/ Christmas which ever applies to you.
Thx all, Happy Holidays / Xmas/ Christmas which ever applies to you.
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Hawke
Well-known member
Another vote for the high temp RTV. Use it on my Formula Ford race car, and it generates some significant exhaust temps.
It's cheap, and works well. I always make sure that all surfaces are clean, and just nip up the screws at first, and leave overnight. Torque up the next day. Works everytime.
It's cheap, and works well. I always make sure that all surfaces are clean, and just nip up the screws at first, and leave overnight. Torque up the next day. Works everytime.