Fel=Pro Head Gasket Failure?
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Fel=Pro Head Gasket Failure?

  1. #1
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    Default Fel=Pro Head Gasket Failure?

    Hi Guys,
    We run a 13.5:1 aluminum head 468 BBC in a drag hydro, and recently suffered a head gasket failure. We were using Fel-Pro's 1027 head gaskets, and upon disassembly, we realized that the fire ring portion of the gasket has a small area on each cylinder that protrudes into the combustion chamber, but only on the head side. On the #8 cylinder where the main water transfer hole is, the overhang placed the edge of the chamber on the head side outside of the fire ring, which allowed combustion to erode the gasket and make a path to the water port.

    So in my shopping for new gaskets, I placed a call to SCE. Their tech informed me that this is a common problem, and is the reason that they do not sell a gasket with a "bore size" of under 4.520, and they suggested that we run this gasket, even though out bore is only 4.310. They said that if you measure the fel-pro gasket in it's widest area, it's 4.550, but the bore opening isn't round. Theirs are 4.520, and are round.

    In summary, has anyone else around here suffered a similar failure? I had considered complaining to Fel-Pro, but am not sure if it's worth the effort...
    Thanks in advance for your responses!
    Last edited by Landlocked; 06-04-2008 at 03:50 PM. Reason: Wrong part number on the gaskets..

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  3. #2
    cfm
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    All aftermarket head companies will tell you the minimum bore headgasket to use because the head's combustion chamber size can be larger than the bore, especially motors under 4.47" bore size.

    Also, you must still double check with headgasket placed on head to make sure no part sticks out into the chamber.

  4. #3
    cfm
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    As an example, read Canfields directions:
    http://www.canfieldheads.com/bbc_310_ins.htm

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  6. #4
    Just another Wannabe Wannabe's Avatar
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    Simple. You are sealing the head to the block. If you set the gasket on the head and the gasket goes inside of the area where the edge of the chamber will seal on the block, get a larger gasket. I don't care if you have to use a 4.630 gasket. The head must seal to the block. It is not Fel-Pros fault.
    Fire ring must be mashed between head and block!
    This is VERY standard. I have the same deal any time I use nice heads on a smaller bore. Small or big block. Most of the aftermarket heads make the chamber set up for a little larger bore as larger bores are much more common. Or a set of older heads that has been worked on. Quite commonplace.

  7. #5
    mo balls than $cents$ IMPATIENT 1's Avatar
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    FELPRO 1017 i've ran them with 9 to 1 compression and 10lbs of boost, and i'm currently runnin them and sprayin ALOT of nitrous and haven't ever blew 1

  8. #6
    mo balls than $cents$ IMPATIENT 1's Avatar
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    btw, have the heads checked now for warpage, i'd bet they're alil warped using the wrong gaskets

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    I guess all this just proves the old adage that if you want something done right, you must do it yourself. I trusted the recommendation of someone whom I thought knew better, and didn't even look at them during re-assembly. The heads are already at a machine shop being welded and re-surfaced. $hit happens!

  10. #8
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    Recommendations need to be just that. Recommendations. Unless that person is there looking at the head gasket setting on the head, then take what they say as merely advice. You have to make the final call on fit as the engine builder. The series of head gasket is a decent gasket. But even if you had an ICS, cometic, MLS or whatever, it would have blown through. The gasket can't try to seal on the inside of the combustion chamber. Sorry for the breakage and the money spent, but chalk it up to "now I know" and you won't make that mistake again.

  11. #9
    gn7
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    Quote Originally Posted by Wannabe View Post
    Recommendations need to be just that. Recommendations. Unless that person is there looking at the head gasket setting on the head, then take what they say as merely advice. You have to make the final call on fit as the engine builder. The series of head gasket is a decent gasket. But even if you had an ICS, cometic, MLS or whatever, it would have blown through. The gasket can't try to seal on the inside of the combustion chamber. Sorry for the breakage and the money spent, but chalk it up to "now I know" and you won't make that mistake again.
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  12. #10
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    Quote Originally Posted by Wannabe View Post
    Recommendations need to be just that. Recommendations. Unless that person is there looking at the head gasket setting on the head, then take what they say as merely advice. You have to make the final call on fit as the engine builder. The series of head gasket is a decent gasket. But even if you had an ICS, cometic, MLS or whatever, it would have blown through. The gasket can't try to seal on the inside of the combustion chamber. Sorry for the breakage and the money spent, but chalk it up to "now I know" and you won't make that mistake again.
    Thats just plane good advise right there.
    Life's journey is not to arrive at the grave safely in well preserved body, but rather to skid in sideways, totally worn out, shouting"....holy shit.... what a ride!"

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    Yep, sound advice.

    The guy putting it together has to make sure it fits, before tightening things down.
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