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Repairing graphite gaskets
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Author:  Aggressive Ted [ Tue Dec 11, 2007 6:36 pm ]
Post subject:  Repairing graphite gaskets
Gents,

Here is another gasket company that builds graphite gaskets. These are 3 times thicker than the one I got out of Australia. My son used a set on his Camaro headers, problem solved!

http://catalog.remflex.com/category_s/87.htm

I am thinking of trying them since my Aussie Gasket blew out. I had a water leak on the rear upper right exhaust stud right after I installed the new Aussie gasket a couple of months ago. I pulled the stud and sealed it. However, it must have eroded part of the gasket on the fire wall side.
So it is leaking exhaust now.....

Any ideas on how to seal the Aussie graphite gasket?
Will orange Hi-temp silicone work?
or will it just break down?
I was hoping I could get away with loosening the nuts and sliding the manifold back and squeezing something in where the gasket has eroded.
Hoping that this will get my by till spring when I can install one the RemFlex gaskets.

Seems like stuff like this happens only when it is snowing hard or freezing....!

Any thoughts on the repair would be appreciated.

Thanks
Author:  Dart270 [ Wed Dec 12, 2007 6:23 am ]
Post subject: 
My guess is there is something wrong with your manifolds or head mating surfaces. I have only rarely had trouble with even the Felpro replacement gasket failing. I have always ignored the 10ft-lb torque spec and do a multi-pass torquing to about 20ft-lbs. I have never cracked an exh man either. When a gasket has gone bad, it was on header flanges.

Food for thought?

Lou
Author:  Aggressive Ted [ Wed Dec 12, 2007 6:48 am ]
Post subject: 
Both the head and intake/exhaust were milled flat. Payed extra to have it done. The hot steam coming out of the last manifold bolt did the damage to the gasket.

So how do you repair the graphite?
What kind of sealer would work?
Author:  Dart270 [ Wed Dec 12, 2007 8:19 am ]
Post subject: 
Ah, steam problem, OK. If the damage is in/near an exh port, then I don't think you can seal it or repair the damage adequately. You might try ultra copper, but doubtful that it will hold back exh gases.

Not sure what to do besides installing a new gasket. Maybe loosening bolts some, stuffing some solid copper wire slightly thicker than gasket around port or damage and some ultra copper sealer, and retightening? Long shot stop gap.

Lou
Author:  Aggressive Ted [ Wed Dec 12, 2007 12:30 pm ]
Post subject: 
Alright Lou, I will order another gasket. Thanks for the stop gap idea. I may try that while I am waiting for the new gasket to come.

Thanks!
Author:  Kidd [ Wed Dec 12, 2007 9:55 pm ]
Post subject: 
I have to say that the Remflex gaskets are great!!!
Andrew
Author:  dakight [ Thu Dec 13, 2007 3:30 am ]
Post subject: 
Quote:
I have to say that the Remflex gaskets are great!!!
Andrew
Do they have the intake to exhaust mating gasket? I looked at their site briefly and didn't see it mentioned.
Author:  Aggressive Ted [ Thu Dec 13, 2007 6:06 pm ]
Post subject: 
No, but they will make them on request. Their gasket would really be good for that joint.

I just got my 2 1/4" gaskets for the header pipe, very, very nice and ordered the intake/exhaust gasket. These gaskets are very thick, about 3/16".
Author:  Aggressive Ted [ Mon Dec 17, 2007 5:44 pm ]
Post subject: 
David,

I need to retract my statement on ........
Quote:
Do they have the intake to exhaust mating gasket? I looked at their site briefly and didn't see it mentioned.
I just got my intake/exhaust gasket today and they include the mating gasket in the package! They are about 1/4" thick graphite and very nicely done. The part number is RF6008. The part# for the 2.25" exhaust header pipe is RF6006.

I think that these gaskets will be far better than the Aussie gaskets because they are sealed and no graphite is exposed. The steam coming out the stud disintegrated my Aussie gasket pretty bad right down to the metal insert sandwich and the rest stuck to the head which I had to scrape off.

The problem comes from someone putting a heli-coil in the heads very last stud hole and not properly sealing it. I don't know if it came from the factory this way or not. So no matter what locking compound I tried the stud would not seal. I had no idea that the last hole had a heli-coil in it until I broke off a tap in it trying to clean up the threads........two days later I got the whole thing out, coil and tap much to my surprise! So two sets of gaskets latter I find the problem. :(

I installed a new H-coil and stud with plenty of JB Weld! The casting is only about 3/8" thick before you hit the water jacket. So I gooped it up good! Hopefully no more "Old Faithful" like gushers from that stud.

Give the gaskets a try, I think you will like them! :D
Author:  dakight [ Mon Dec 17, 2007 6:15 pm ]
Post subject: 
I've got the link bookmarked for when I am ready for the gaskets. Thanks for the info!
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