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10-16-2002, 04:52 PM
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CC Member
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Join Date: Apr 2001
Location: West Suburbs,
IL
Cobra Make, Engine: Titanium SPF, 521 CID Gessford.
Posts: 338
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Not Ranked
Exhaust Leaks at Header
Hi all!
I put my motor back in, its fixed and stronger.
However, I have some big exhaust leaks at the head/header connection. Dont want to drive it much as it might mess up the exhaust valve at that port...
I'm either gonna put on new gaskets (perhaps turn em around) or just put on a bead of silicone.
If you would like to help me with the fix, please let me know.
If you have ideas, please let me know...
If you have a heated garage with a lift that we could use, that would be a plus.
Thanks,
CC
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10-16-2002, 05:02 PM
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CC Member
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Join Date: Mar 2002
Location: so cal,
Cal
Cobra Make, Engine: I used to fix them for a living
Posts: 2,563
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Not Ranked
Use the blue fel pro header gaskets. never reuse header gaskets. Crank those little header bolts tight, then retighten again after a heat cycle or two.
__________________
In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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10-16-2002, 05:05 PM
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CC Member
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Join Date: Oct 2000
Location: Crystal Lake,
IL
Cobra Make, Engine: Everett-Morrison, 434 cid
Posts: 977
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Not Ranked
cdog,
I use new Fel Pro gaskets and high temp sealer on both sides if its already had gaskets.
The best method for a new header is to use only the high temp sealer and no gasket, once a gasket is used the flange warps and you are forced to use a gasket, then its hard to get a permanent seal.
Scott
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10-17-2002, 04:34 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: North west suburbs Chicago,
Il.
Cobra Make, Engine: Classic Roadster
Posts: 1,528
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Not Ranked
header
Don't have alift but do have available heat in garage.
Be happy to help out if I can.
Arcenio
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10-17-2002, 04:53 PM
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CC Member
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Join Date: Nov 2001
Location: Naperville, Illinois,
IL
Cobra Make, Engine: FFR, 460 big block, 850 Demon, 5 speed tremec TKO, Titanium Silver w/ Charcoal stripes
Posts: 83
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Not Ranked
CDOG,
If you think header flange warpage is the culprit some times 2 gaskets per side with sealant can do the fix.
No lift here but plenty of heat and plenty of tools.
Call me if you would like to fix it at my house, I can help.
RickyRace.
__________________
FFR#3169 BBF460ci, Carb, Tremec TKO, Titanium
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10-17-2002, 05:03 PM
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CC Member
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Join Date: Mar 2002
Location: so cal,
Cal
Cobra Make, Engine: I used to fix them for a living
Posts: 2,563
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Not Ranked
If you have warped flanges, cut the flanges between each of the pipes. Each pipe then has it's own discrete flange. This really helps on crappy headers with thin flanges. Some guys swear by soaking the header gaskets in water so they swell prior to install. Then they take a better "set" once heated, never tried it myself though.
__________________
In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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10-17-2002, 05:15 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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Not Ranked
Fel Pro solid copper header gaskets, and a bead of Ultra copper hi-temp RTV. No leaks.
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10-26-2002, 03:29 PM
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CC Member
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Join Date: Apr 2001
Location: West Suburbs,
IL
Cobra Make, Engine: Titanium SPF, 521 CID Gessford.
Posts: 338
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Not Ranked
I got these fixed, I think.... Used a ****load of red silicone, installed the gaskets backwards (flat side out as they fit better that way) cranked the headers down...
I think I might still have one small leak though.
In case you havent done this, it ain't easy.
__________________
Join the N.R.A. -- Homeland Security begins in YOUR home.
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10-27-2002, 05:03 AM
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CC Member
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Join Date: May 2002
Location: Beaufort,
SC
Cobra Make, Engine: Classic Roadsters '66 427 Replica-SOLD
Posts: 299
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Not Ranked
The best gaskets around are Earl's and they are available from Summit!!!
They have an aluminum frame and graphite inserts. You tighten them once and forget them!!! The frames are reusable and the inserts are $18.00 or so I think.
I've run them a year now with no leaks!!
Coosawjack  |
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