Thread: header leak question
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04-19-2005 07:20 PM #1
header leak question
hey very simple question im having header leaks i was just wondering if i can use the red gasket sealer on the headers? i know its good up to 650 degrees but is it ok under pressure?
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04-19-2005 08:16 PM #2
my brothers 69 chevelle had headers on it with fel-pro gsks and when the motor was rebuilt with the new headers, every time before he drove the car and every time after he shut it off he would re tighten the header bolts. he did this for about a week and then the bolts finally quit tightening and he put on over 30,000 miles so far and hasn't had a gasket leak yet. the motor has around 380 hp so the headers do have some stress also.Seth
God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing. C.S.Lewis
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04-19-2005 08:28 PM #3
I did not want to annoy DennyW because he has been very helpful in other matters, BUT(!) there are several kinds of gaskets. I guess (?) the gaskets he wants to double up after soaking in hot water are the all fiber type????? A circle track racer recommended the type with a perforated metal surface on one side and fiber on the other. Then there are expensive ($35/set) aluminum gaskets that run the full length of the head. I would buy the aluminum gaskets if I was sure they would seal, but for now I guess I will use a set of the fiber ones over the metalized ones for a double deal after soaking. DennyW, can you be more specific about the type gasket you recommend soaking?
Don Shillady
Retired Scientist/teen rodder
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04-19-2005 08:49 PM #4
We use the red silicone as a gasket dressing on some exhaust connections on our ship. Temps are around 900 degrees under power. On gaskets we need to be easily removed, we coat them with anti-sieze.
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04-20-2005 12:07 PM #5
i used assembly grease for my header gaskets on my 69 galaxie with a 390 and a set of hooker headers..... haven't had them leak in over 50k milesjust because your car is faster, doesn't mean i cant outdrive you... give me a curvy mountain road and i'll beat you any day
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04-20-2005 12:55 PM #6
I changed over to soft copper gaskets cost about $25.00 at a swap meet . had the best luck with theses.
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04-20-2005 12:57 PM #7
Bothe Carquest and NAPA (and I'm sure many others too) that's like the metal filled fibre outer gaskets seen above. NAPA's are called Nitroseal and are kick ass. My old, cheap header flanges are not quite flat and it took the leak out of those, first try. They also make them for the collector end and you can use them over and over and over and over, well you get the idea. They are definitely more expensive, but well worth it in the long run. I have yet to see a set fail.
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04-20-2005 02:04 PM #8
Originally posted by orange crush
I changed over to soft copper gaskets cost about $25.00 at a swap meet . had the best luck with theses.Ed ke6bnl@juno.com
1963 Ford Econoline 5 window
1950 Ford F1 pu
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1953 Chevy 3100 AD
1970 Chevy Short bed c10
1972 El Camino chopped top
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance