header gaskets - 460 Ford Forum
Jon Kaase Racing Engines Jon Kaase is considered one of the best minds in the world of Big Block Fords and has created many parts to help enthusiasts with their 460 based projects. Gentlemen start your questions…

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post #1 of 19 (permalink) Old 05-30-2014, 01:49 PM Thread Starter
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header gaskets

Someone tried to talk me out of putting headers on my 460 dump truck. He tells me no matter what I do I will always have exhaust system leaks. Is there a magical gasket material out there that I won't have a problem with.
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post #2 of 19 (permalink) Old 05-30-2014, 02:26 PM
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I've always had good luck with the dead soft aluminum gaskets.

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post #3 of 19 (permalink) Old 05-30-2014, 05:31 PM Thread Starter
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Do you know anything about graphite gaskets
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post #4 of 19 (permalink) Old 05-30-2014, 08:05 PM
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header gaskets

I've never had an issue with any gaskets. Felpro or mr gasket. Just make sure the pipes you use have a nice solid flange plate. And are actually flat before fitting. Retorque the bolts a few times after they've seen a few heat cycles and you should be fine.
Graphite gaskets I've not used on exhaust but have used Victor Reinz intakes I believe are graphite and they are the best I've used


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post #5 of 19 (permalink) Old 05-31-2014, 09:55 AM Thread Starter
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Headers are l&l's. Can't wait to get my heads back and get it together. Thanks for everyone's help.
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post #6 of 19 (permalink) Old 06-09-2014, 09:56 PM
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I use a carbon felt gasket....think of a dense cotton candy and thats on both faces ...seals nice

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post #7 of 19 (permalink) Old 06-10-2014, 05:24 AM
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Quote:
Originally Posted by gregaust View Post
I've never had an issue with any gaskets. Felpro or mr gasket. Just make sure the pipes you use have a nice solid flange plate. And are actually flat before fitting. Retorque the bolts a few times after they've seen a few heat cycles and you should be fine.
Graphite gaskets I've not used on exhaust but have used Victor Reinz intakes I believe are graphite and they are the best I've used


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post #8 of 19 (permalink) Old 06-30-2014, 09:59 PM
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Percys XXCarbon

Have theses on mine, flanges are rough at best and they seal good, no problems at all.
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post #9 of 19 (permalink) Old 10-19-2014, 03:00 PM
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Once I was helping my son put a 460 into a fox stang and we had a terrible gasket leak. As it turned out the header flange was not pulling up to the head surface. There was a ridge below the exhaust port that caused the problem. Don't remember the # on heads, Headers were 2 1/2" big tubes. Probably just a compatibility issue (too much header & not enough head) LOL. Just watch for this issue if you if you don't want to have to take a grinder to your flanges.

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post #10 of 19 (permalink) Old 10-19-2014, 07:22 PM
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I use the red hi-temp RTV. I put a small bead on the head surface and then install the manifolds or headers using pilot studs as not to smear the silicon out of place. Once they make contact I install the rest of the bolts and replace the pilot studs with bolts as well.I snug them very slightly and let them set up over night. I then torque to spec the next day. I've been doing this for years on all my work trucks as well as the race car with zero leaks.

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post #11 of 19 (permalink) Old 11-12-2014, 08:32 PM
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Remflex header gaskets

www.remflex.com best header gasket on the market, I think 3011 is the part number for 460 Ford.
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post #12 of 19 (permalink) Old 11-18-2014, 07:25 PM
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well here is my trick for header gaskets, I soak them in a bucket of water before installing them, once you have them installed wet start the engine and let them get good and hot then tighten up once and thats it.
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post #13 of 19 (permalink) Old 11-18-2014, 08:22 PM
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Quote:
Originally Posted by QUICKSHIFT View Post
I use the red hi-temp RTV. I put a small bead on the head surface and then install the manifolds or headers using pilot studs as not to smear the silicon out of place. Once they make contact I install the rest of the bolts and replace the pilot studs with bolts as well.I snug them very slightly and let them set up over night. I then torque to spec the next day. I've been doing this for years on all my work trucks as well as the race car with zero leaks.
X2. I stopped wasting good money on expensive "it'll seal anything" gaskets years ago. Since most all RTV silicone is basically all the same formula and has almost identical pressure strength and temperature ranges, most any type of RTV will work. (I know this because I attended an 8 hour Lock Tite class years ago and that info is right out of the tech's mouth).
The problem with header sealing is the POS production line headers them selves! I've NEVER seen a set that WASN'T warped right out of the box. Take the time to make the thin azz flanges, that have been warped from welding, flat and you won't need ANY gaskets.
Even the heavy over-the-transom 2" Hooker Super Comps that I have on my boat don't leak, and I haven't run gaskets on the past 2 engines......but the heads AND the flanges are dead flat.
Rob

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Last edited by White Lightning; 11-18-2014 at 08:32 PM.
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post #14 of 19 (permalink) Old 11-18-2014, 08:30 PM
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Quote:
Originally Posted by QUICKSHIFT View Post
I use the red hi-temp RTV. I put a small bead on the head surface and then install the manifolds or headers using pilot studs as not to smear the silicon out of place. Once they make contact I install the rest of the bolts and replace the pilot studs with bolts as well.I snug them very slightly and let them set up over night. I then torque to spec the next day. I've been doing this for years on all my work trucks as well as the race car with zero leaks.
X3

didn't know they even still made gaskets for headers lol

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post #15 of 19 (permalink) Old 11-18-2014, 08:40 PM
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I've always found that you're better off with no gaskets. They can't burn out that way!

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