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05-21-2003, 03:24 AM
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CC Member
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Join Date: May 2003
Posts: 16
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Not Ranked
Headers loosening quickly on a 428CJ
I am having problem with header bolts loosening on my recently aquired EM 428 w/ Edlebrock heads. The header bolts loosen up every 100-200 miles or so. When I bought the car with 400 miles, it had already lost two bolts and now the gasket has blown because one of the other bolts was stripped (the driver rear which is nearly impossible to get to of course!).
Does anyone make a gasket with metal that is stronger than the wimpy compressed fiber ones that are on there now. The headers are mounted to the frame with a rubber mount to relieve stress, but only mount to the engine with 8 bolts which doesn't torque down the front and rear much - allowing the 1/4 inch wide or so gasket to blow out easily
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05-21-2003, 03:52 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
Get yourself a set of Earl's exhaust gaskets!! Summit and others carry them.
I had the same problem and they fixed the whole situation!! They are aluminum frames (re-usable) with carbon inserts. You tighten them down once and that's it......NO MORE BLOWN GASKETS!!!
Best $30 I ever spent!!
Good Luck,
Jack  |
05-21-2003, 07:22 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
I solved the problem with a set of stainless header bolts drilled for safety wire. You wire two together.
Roscoe
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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05-21-2003, 08:37 AM
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CC Member
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Join Date: Dec 2000
Location: Livermore,
CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
Posts: 852
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Not Ranked
Richmond,
I'm using a set of copper header gaskets. I ordered them through Summit. Haven't blown one yet. Of course I only have 50 miles on the new motor. 
Chris |
05-21-2003, 08:52 AM
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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
Sometimes it dan be helped by cutting the exhaust flange into four separate flanges.
__________________
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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05-21-2003, 09:55 AM
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CC Member
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Join Date: May 2003
Posts: 16
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Not Ranked
Thanks! Does anyone have the part # for the gaskets that fit the edlebrock heads - when I bought the other gaskets, there were two port sizes and I needed the larger ones. I'll order today.
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05-21-2003, 11:56 AM
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CC Member
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Join Date: May 2003
Posts: 16
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Not Ranked
Found it - I guess there is only 1 - no idea what the smaller version(same outside shape) was for that they had at the parts store.
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05-22-2003, 04:17 PM
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CC Member
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Join Date: Aug 2002
Location: Uranus,
cal
Cobra Make, Engine: NAF replica, 351W, about 420 HP
Posts: 3,046
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Not Ranked
I have been told by a few people that to keep header bolts tight, you have to tighten the header bolts after every time you drive the car. After 4 or 5 times, they do not loosen up anymore. It has worked for me; quality gaskets help, too!
__________________
Edley, The Cobra Rogue!
"If you think that you can cut it, if you think you got the time, you'll only get just one chance, better get it right first time. 'Cause in this game you're playing, if you lose you got to pay, and if you make just one wrong move, you'll get BLOWN AWAY. Expect no mercy.
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05-22-2003, 06:02 PM
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CC Member
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Join Date: Dec 2001
Location: Syracuse, NY,
Posts: 104
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Not Ranked
I switched to Stage 8 header bolts. They have a locking clip that keeps them in place. Put 'em on once and forget 'em. You can get them from Summit.
Go to: http://www.stage8.com/AutomotiveStart.htm
For more info.
Phil |
05-22-2003, 06:21 PM
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Senior Club Cobra Member
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Join Date: Jan 2000
Location: Phoenix, AZ,
Posts: 544
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Not Ranked
I was about to suggest the Stage 8 stuff -- and wouldn't you know it, Phil -- you beat me to it. Good job.
Ben
__________________
"The single best reason for the invention of gasoline."
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05-22-2003, 06:56 PM
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CC Member
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Join Date: Dec 2001
Location: Syracuse, NY,
Posts: 104
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Not Ranked
Hi Ben! 
Phil |
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