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Old 11-05-2011, 12:01 PM   #1
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header gasket...agian:(

i think my header gasket has blown again...damn its a hassle this is second time its done it sence my shorty install...on passanger side why does it keep blowing??
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1995 5.0 u/d,cai,t/b,shorty headers,x pipe,flows 40's,373 gears, alum. driveshaft, alum. radiator, shift kit, e-cam, ported upper and lower intake, 100 shot of spray, 2100 stall, black 0304 cobras. suspension: upper and lower control arms, sub frame connecters, and springs all SVE
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Old 11-05-2011, 12:06 PM   #2
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I used copper gaskets when I did mine w/ no issues. Also if the flanges have weld trash on them it can cause issues. I filed my flanges down, and knocked down the weld in the tubes too.
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Old 11-05-2011, 12:12 PM   #3
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Re: header gasket...agian:(

Copper gaskets and cleaning up the header surface is very good advice.

I have also used a thin coat of Permatex Ultra Copper silicone over both sides of the paper gaskets with good results. Just let the silicone dry completely after spreading it on the gasket with your fingers and lightly grease the header and head surfaces when installing. The grease allows the gasket to move around a bit during installation to keep from tearing the coat of silicone.
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Old 11-05-2011, 12:19 PM   #4
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Took me a long time to install mine, and it was a real pain. I had herd the horror stories of blown gaskets and $25 bucks for copper gaskets is a small price for piece of mind.
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Old 11-05-2011, 12:20 PM   #5
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Re: header gasket...agian:(

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Originally Posted by deadsp0t View Post
I used copper gaskets when I did mine w/ no issues. Also if the flanges have weld trash on them it can cause issues. I filed my flanges down, and knocked down the weld in the tubes too.
details plz...where did u get them??
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1995 5.0 u/d,cai,t/b,shorty headers,x pipe,flows 40's,373 gears, alum. driveshaft, alum. radiator, shift kit, e-cam, ported upper and lower intake, 100 shot of spray, 2100 stall, black 0304 cobras. suspension: upper and lower control arms, sub frame connecters, and springs all SVE
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Old 11-05-2011, 12:26 PM   #6
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When I bought/traded for my headers at FastLane(a speed shop) I ordered them there. Any speed shop can get them for you, maybe the parts store too. I'd have to look but I'd guess AM.com has them too.

---------- Post added at 01:26 PM ---------- Previous post was at 01:23 PM ----------

Mine were Mac brand, they used to advertise them in the Mac ad in MM&FF.
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Old 11-05-2011, 12:39 PM   #7
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Re: header gasket...agian:(

Couldn't find them on AM, but LRS has them.

LRS Copper Header Gaskets
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Old 11-05-2011, 04:05 PM   #8
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Quote:
Originally Posted by Trojan Horse
Couldn't find them on AM, but LRS has them.

LRS Copper Header Gaskets
Price is a little more then what I paid but that was years ago, piece of mind is not cheap!
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Old 11-06-2011, 10:58 AM   #9
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I went with 7 ply aluminum ones a bit of. Pain to put on but selled them up
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Old 11-23-2011, 03:07 PM   #10
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Copper header gaskets...fail too thin sealed on head side but not on header side...went with alum...
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Old 11-23-2011, 06:01 PM   #11
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Re: header gasket...agian:(

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Originally Posted by mystang50 View Post
Copper header gaskets...fail too thin sealed on head side but not on header side...went with alum...
I'm thinking that you have some other issue than gaskets.
Have you checked the headers and head sealing surfaces for flatness?
I bet that likely the header flanges are warped the way all four cylinders show leakage.

P.S. You can anneal and re-use copper gaskets.
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Old 11-23-2011, 06:07 PM   #12
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I've always had good luck with the advance 9000 something(can't remember exactly) header gaskets, have yet to blow them out. When I took the headers off my 87 gt they still looked like new and had been on the car for 4 years.
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Old 11-24-2011, 07:43 PM   #13
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Quote:
Originally Posted by Trojan Horse

I'm thinking that you have some other issue than gaskets.
Have you checked the headers and head sealing surfaces for flatness?
I bet that likely the header flanges are warped the way all four cylinders show leakage.

P.S. You can anneal and re-use copper gaskets.
These gaskets were really thin man, but header looked fine by Jus lookin at it...but they sealed up with alum ones...
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Old 11-24-2011, 08:05 PM   #14
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Quote:
Originally Posted by mystang50

These gaskets were really thin man, but header looked fine by Jus lookin at it...but they sealed up with alum ones...
What brand name where they? Mine had a raised bead around all the ports that smashed down to seal everything up.

Are they(gaskets) blowing the same place each time?

What about your header bolts, new? Used? Loc-tite of any kind?
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Old 11-24-2011, 08:22 PM   #15
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Quote:
Originally Posted by deadsp0t

What brand name where they? Mine had a raised bead around all the ports that smashed down to seal everything up.

Are they(gaskets) blowing the same place each time?

What about your header bolts, new? Used? Loc-tite of any kind?
They were from lrs...no with tha paper ones it would blow diff places on diff sides...header bolts are tha ones that came with bbk headers I used loc-tite
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Old 11-24-2011, 08:24 PM   #16
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Quote:
Originally Posted by mystang50

They were from lrs...no with tha paper ones it would blow diff places on diff sides...header bolts are tha ones that came with bbk headers I used loc-tite
That's odd! Glad you got it sorted out though!
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Old 11-24-2011, 08:35 PM   #17
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Re: header gasket...agian:(

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Originally Posted by mystang50 View Post
These gaskets were really thin man, but header looked fine by Jus lookin at it...but they sealed up with alum ones...
The aluminum gaskets are thicker?
If so, and they seal, then your surfaces are warped, but if they work and you are satisfied then good.

The thickness of the gasket should have no effect on the sealing if your surfaces are true and flat.
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Old 11-24-2011, 09:47 PM   #18
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Quote:
Originally Posted by Trojan Horse

The aluminum gaskets are thicker?
If so, and they seal, then your surfaces are warped, but if they work and you are satisfied then good.

The thickness of the gasket should have no effect on the sealing if your surfaces are true and flat.
Yeah I agree, but didn't want to get headers machined...but those header gaskets were really thin, more thin than paper material ones
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Old 11-24-2011, 11:17 PM   #19
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Re: header gasket...agian:(

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Yeah I agree, but didn't want to get headers machined...but those header gaskets were really thin, more thin than paper material ones
I can understand that. The hassles of R&R just aren't worth it at times.
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