Author Topic: Ehaust Manifold/Header Gasket  (Read 228 times)

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Offline dsrace

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Ehaust Manifold/Header Gasket
« on: April 01, 2021, 03:41:21 PM »
fabr....... do you remember that talk we had about my exh manifold continuing to leak??     and your suggestion was to high temp copper rtv it!

http://vb.foureyedpride.com/showthread.php?38873-no-exhaust-manifold-gasket
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

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Re: Ehaust Manifold/Header Gasket
« Reply #1 on: April 01, 2021, 06:36:03 PM »
I remember it well, You looked at me like I was crazy.  :m Nearly all ex manifolds are installed without a gasket OEM. It takes a flat and smooth surface on both the head and the manifold. I use the Ultra Copper silicone stuff for minor irregularities that come about with repeated R&R.

WHen using any of the rtv stuff remember to always let the rtv to be exposed to air for at least a few minutes to allow it to absorb a little moisture from the air before bolting it up. If you do not do that the silicone will not cure properly. Moisture is essential to beginning the curing process. The dryer the air the longer you need it to be exposed to air.
« Last Edit: April 01, 2021, 06:40:39 PM by fabr »
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Offline dsrace

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Re: Ehaust Manifold/Header Gasket
« Reply #2 on: April 02, 2021, 06:40:10 AM »
 :m  i had never heard of anyone doing it that way on turbo gas engines. i did believe you installed your v8 manifolds that way. i know all 7.3 diesel exh manifolds are installed w/o gaskets.

i am going to remove my copper gasket and re check my manifold to see if its still flat. i will reinstall with rvt extreme temp copper. i'll give that a try.

good info on humidity and silicone btw

i came a cross that link looking for the p/n for the copper raised ring gasket i used. thought you might like to see that......an i told you so moment  LMAO
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

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Re: Ehaust Manifold/Header Gasket
« Reply #3 on: April 02, 2021, 07:27:12 AM »
In a tight fit up the silicone needs ample time to cure especially in thin applications. I like to give it 24 hours before starting engine. Make sure you give it maybe even 15-20 minutes exposure to air to begin to cure . I just run a  small bead around the tubes,let sit and then bolt it up. I do not spread it out before assembling. I also use only https://www.permatex.com/products/gasketing/permatex-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker/

 I also use this little gem. https://goodson.com/products/eb-416-the-tube-grip-eb-416?variant=29264031430 Worth every penny!!!!! You have ultimate control of dispensing and you can get every last bit of product from tube. It will pay for itself in no time.
« Last Edit: April 02, 2021, 07:40:47 AM by fabr »
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Offline dsrace

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Re: Ehaust Manifold/Header Gasket
« Reply #4 on: April 02, 2021, 02:50:52 PM »
thanks for the link fabr..... i just ordered 1 for the tubes! i like that idea.
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

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Re: Ehaust Manifold/Header Gasket
« Reply #5 on: April 02, 2021, 06:29:35 PM »
You will love it.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)