C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Header gaskets keep blowing out

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Old Dec 13, 2005 | 08:30 PM
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From: jojobe Tx
Default Header gaskets keep blowing out

What should i get to correct this problem. It seems that the paper gaskets are not good enough.
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Old Dec 13, 2005 | 08:35 PM
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how about ARP bolts?

Last edited by tigmaned; Dec 16, 2005 at 09:19 AM.
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Old Dec 13, 2005 | 08:43 PM
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From: jojobe Tx
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no my bolts kept getting loose and before i know it ive blown my gaskets.The heads and engine have been redone. Everything should be tip top.
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Old Dec 13, 2005 | 08:46 PM
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The copper and aluminum gaskets are good. What kind of headers are we talking about?
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Old Dec 13, 2005 | 08:47 PM
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Try copper or aluminum gaskets
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Old Dec 13, 2005 | 08:48 PM
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Is there an echo in here
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Old Dec 13, 2005 | 09:23 PM
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I think I bought Felpro 1406 gaskets, you could use Percy's aluminum's as well.
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Old Dec 13, 2005 | 09:50 PM
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My Percy's don't leak and my engine gets cold at night.
(I was in the water, It's shrinkage!)
Mike
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Old Dec 13, 2005 | 10:16 PM
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Fel-pro's and stage 8 bolts heat cycled, re-tightened and add the locks, seem to work for me.
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Old Dec 13, 2005 | 10:45 PM
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Originally Posted by Corvette Kid NC
The copper and aluminum gaskets are good. What kind of headers are we talking about?
Hedmen headers
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Old Dec 13, 2005 | 10:53 PM
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Originally Posted by Caleb56
Hedmen headers
I'll guess like most of their headers then, these have 1/4" flanges. If they're not already warped, I'd try the one of the metal gaskets. Otherwise, try the Felpros. Either way, recheck for tight frequently.
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Old Dec 13, 2005 | 10:57 PM
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Originally Posted by Corvette Kid NC
I'll guess like most of their headers then, these have 1/4" flanges. If they're not already warped, I'd try the one of the metal gaskets. Otherwise, try the Felpros. Either way, recheck for tight frequently.
What size should i go for? Im thinking the 1.5 are too small and was looking into getting the 1.63 but i dont want to get the wrong size. I can post a picture of one of the blown gaskets if that would help? The blown gaskets were 1.5.
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Old Dec 13, 2005 | 11:02 PM
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Try getting Stage 8 bolts. They have clips that keep them tight
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Old Dec 13, 2005 | 11:07 PM
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Old Dec 14, 2005 | 02:52 AM
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One side blew out recently, replaced it with a felpro unit.

As far as bolts keep loosing up, just keep a check on them everytime you change your oil or something.
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Old Dec 14, 2005 | 03:53 AM
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I don't think those are 1406's from fel pro.
Well they don't look like my 1406's mine are blue in color and a more square port.
I would run the lock as previous mentioned I have the locks on mine and they have the allen head in the center so you can get at most of them.
I use 3 short regular bolts that I have to tighten about once a mth.
.
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Old Dec 14, 2005 | 11:15 AM
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Auto Zone has Percy's aluminum ones, kinda pricy but they do work. The important thing is to remember to go through a procedure with them before driving the car. Warm the engine good, let it cool, tighten the bolts. Do this about 3 times before driving and I think you'll be much happier.
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Old Dec 14, 2005 | 11:37 AM
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Your headers should have 1 5/8" tubes. I would use a GOOD paper type gasket with square ports. Re-tighten the header bolts after each heat cycle, for the first several times. Then every few cycles for a short while. Soon you will realize that checking them is unnecessary. There is no need to spend a fortune for the latest, greatest, (read that as expensive) trick gaskets or bolt systems. The standard parts will do just fine, if you keep after them for a short while.

RACE ON!!!
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Old Dec 14, 2005 | 06:29 PM
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Thanks for all the help just need to know what size most people go for.
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Old Dec 14, 2005 | 06:57 PM
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Originally Posted by mseven
Fel-pro's and stage 8 bolts heat cycled, re-tightened and add the locks, seem to work for me.
I swear by Stage 8 bolts, man. I was getting regular exhaust leaks on my '90's LT headers. I put a set of these on with some good gaskets, voila, no more leakage.
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