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Epoxy/metal filler that will hold up in exhaust port?

Posted By: Michael Ecks

Epoxy/metal filler that will hold up in exhaust port? - 07/17/19 02:44 PM

Does such a thing exist? I have a pair of aluminum heads I bought used, not noticing that the exhaust ports have been opened up nearly to W2 size. With the standard headers, this would have a good amount of exhaust gas flow crashing into the header flange. I think there is enough material to seal, but I would prefer to be able smooth out the transition from the exhaust runner into the header.

This will be for a driver/street stroker. So it has to be a fix that will last more than a race or a season
Posted By: 340Cuda

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/17/19 03:03 PM

I don't think what you are looking for exists.

However aluminum heads can be easily welded up.
Posted By: jcc

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/17/19 05:03 PM

The max I have ever read about epoxy based is around 500F, and that is expensive, so my answer to your question is, no.
Posted By: rickseeman

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/18/19 06:01 PM

I wouldn't bother with epoxy/metal when the known fix is easy. Weld and grind.
Posted By: GODSCOUNTRY340

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 02:09 AM

Grind the header flange to match the ports.
Posted By: Neil

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 02:11 PM

Yes, you can weld on the outside of the header tube/flange connection and grind the inside opening bigger to a point.
Posted By: Stanton

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 08:40 PM

Originally Posted by Neil
Yes, you can weld on the outside of the header tube/flange connection and grind the inside opening bigger to a point.


I can't see the headers making it around the block after this mod !! The weld on the thin gauge tube will make them brittle - the main reason virtually every header is welded on the inside of the flange.
Posted By: fast68plymouth

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 09:20 PM

Obviously, the correct solution is to weld the heads up.

Whether or not the heads in question are worth the time and $$$ to go through that is another story.
Posted By: Sniper

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 09:58 PM

Originally Posted by fast68plymouth
Obviously, the correct solution is to weld the heads up.



They make W2 headers you know,
Posted By: fast68plymouth

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/19/19 11:52 PM

Originally Posted by Sniper
Originally Posted by fast68plymouth
Obviously, the correct solution is to weld the heads up.



They make W2 headers you know,


Don’t dedicated W2 headers use the W2 bolt pattern?
Posted By: Sniper

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/20/19 12:28 AM

Drilling holes is easier than welding exhaust ports.
Posted By: topside

Re: Epoxy/metal filler that will hold up in exhaust port? - 07/20/19 02:18 AM

W2 to LA header flange adapters, if you have room to space your header outwards.
Posted By: jcc

Re: Epoxy/metal filler that will hold up in exhaust port? - 10/27/19 01:04 AM

Originally Posted by Michael Ecks
Does such a thing exist? I have a pair of aluminum heads I bought used, not noticing that the exhaust ports have been opened up nearly to W2 size. With the standard headers, this would have a good amount of exhaust gas flow crashing into the header flange. I think there is enough material to seal, but I would prefer to be able smooth out the transition from the exhaust runner into the header.

This will be for a driver/street stroker. So it has to be a fix that will last more than a race or a season


This is a new product from a company i buy material from, it's worth looking at, as there is nothing else available i am aware of.

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