Gasket Material: Copper or Aluminum?

[motorhead]

I am having some sealing problems between my 3" TH-style DP and my exhaust housing. I have been using Copper Permatex to attempt to gain a good seal. However, gets kinda flaky over time.

I am going to make a gasket to take the place of the Permatex.
I'll be using .005"-.010" material to create the seal.

Should I use copper or aluminum?

I like the idea of using the aluminum because it is softer than the copper and should take shape easier, and sealing should be simplified.

However, if the aluminum melts... then copper makes more sense.

Please offer your thoughts and experiences.

Thanks,

 

[TurboDave]

I think I'd stick with Ultra Copper for that situation. Trying to get a gasket to work there might cause more problems than it's worth to fix. Puck alignment, etc.

Besides, a small leak there isn't going to hurt anything. After all, the exhaust gasses have done their work, and are just useless waste at that point.

 

[motorhead]

Originally posted by TurboDave
I think I'd stick with Ultra Copper for that situation. Trying to get a gasket to work there might cause more problems than it's worth to fix. Puck alignment, etc.

Besides, a small leak there isn't going to hurt anything. After all, the exhaust gasses have done their work, and are just useless waste at that point.

Dave,
You aren't supposed to make me smile.

I am just trying to be neat and tidy ... but, I should pull it all apart to see where it is still leaking... and add more goo.

Thanks,