BBC weak head stud threads...need those special solutions by Pioneer bolt??? GN7?
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BBC weak head stud threads...need those special solutions by Pioneer bolt??? GN7?

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    Senior Member A handfull's Avatar
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    Default BBC weak head stud threads...need those special solutions by Pioneer bolt??? GN7?

    You guys had a kick ass solution for these on an old thread. Someone bought a bunch of NOS pieces from a bolt supplier...and I need several for a 14-71 alcohol injected 468". Boat runs strong 8 flats...but several studs are giving up at around 50ftlbs...damn.

    I think you..GN7...had good luck with two diffetent brands. Thanks in advance.

    Thanks!!!!

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    gn7
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    Quote Originally Posted by A handfull View Post
    You guys had a kick ass solution for these on an old thread. Someone bought a bunch of NOS pieces from a bolt supplier...and I need several for a 14-71 alcohol injected 468". Boat runs strong 8 flats...but several studs are giving up at around 50ftlbs...damn.

    I think you..GN7...had good luck with two diffetent brands. Thanks in advance.

    Thanks!!!!
    Not sure where you guys come up with this stuff. Somebody was suggesting I knew of some cool breather too. I have never used a VC breather.

    Anyway, not sure what you mean by giving up. You mean the stud is failing? Are you sure you aren't pulling the stud out of the block threads? Never failed a stud in my life, and the inly studs I have ever used are ARPs.

    If you are in fact failing the studs, I would be replacing one or two, I'd be getting rid of them all.



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    Senior Member ol guy's Avatar
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    Quote Originally Posted by A handfull View Post
    You guys had a kick ass solution for these on an old thread. Someone bought a bunch of NOS pieces from a bolt supplier...and I need several for a 14-71 alcohol injected 468". Boat runs strong 8 flats...but several studs are giving up at around 50ftlbs...damn.

    I think you..GN7...had good luck with two diffetent brands. Thanks in advance.

    Thanks!!!!
    If you are pulling studs out of the block then its heli-coil and new stud time!

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    Senior Member Hass828's Avatar
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    Its to bad they dont make a blind tapped insert so that once installed the water couldnt get to the stud any longer.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
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    gn7
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    Quote Originally Posted by hass828 View Post
    its to bad they dont make a blind tapped insert so that once installed the water couldnt get to the stud any longer.
    you make them



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    Senior Member Hass828's Avatar
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    Quote Originally Posted by gn7 View Post
    you make them
    I dont like waiting for that much J&B weld to set up.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
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  9. #7
    Senior Member A handfull's Avatar
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    Default Yes..block threads are failing. There was an older discussion...Hi quality Heli coils

    Quote Originally Posted by gn7 View Post
    Not sure where you guys come up with this stuff. Somebody was suggesting I knew of some cool breather too. I have never used a VC breather.

    Anyway, not sure what you mean by giving up. You mean the stud is failing? Are you sure you aren't pulling the stud out of the block threads? Never failed a stud in my life, and the inly studs I have ever used are ARPs.

    If you are in fact failing the studs, I would be replacing one or two, I'd be getting rid of them all.
    There was an older discussion about a Hi Quality Heli Coil repair...I can't find it now...I thought your were involved with that discussion...actually a guy put a nut on the back side to get him by at an event before he got a hold of this special deal...then he never had a problem afterwards...anyway...any recommendations would be great. The head studs are fine...the stock block is just letting go unfortunately. This is an alcohol deal and I do not run water in the block.

    Also...on a side note..SLOW BOYS jet boat blower deal was an interesting discussion...where you suggested that the heads are backing up the flow of the blower...they just plain don't breath enough air...and the boost backs up in the plenum..and power falls off with more boost. Where did he wind up with his new combo?? Anyway...I did see that boat run last year with his old set-up...and it was very impressive...it left very quick and sounded clean. The guy really had it set up nice....I would love to see him drag that boat down to Wheatland this year. Anyhow...thanks for a quality MFG suggestion and maybe a part#.

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    Senior Member A handfull's Avatar
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    Default Found the old discussion. Thanks for the help.

    Here's the old info if anyone needs it:
    Nutsert..Kingsert...Keensert...Bigsert...Pioneer Inc Part#EL-7...and Grainger item#4ZE22...were all recommendations..use red locktite or JB Weld on the stakes so water does not leak.

    EX. 5/8"x11
    INT. 7/16"x14

    The keen serts work well, I think you drill the hole with a 9/16" bit and like GN said you use a 5/8"-11 tap so you dont need a bunch of special stuff. I would JB weld them in so that the threads on the block don't rust any more. I had a 396 block and it had several helicoils and keen serts in it. I finally jb welded in a set of studs and never had another one pull out. I just hate that feeling when torqueing the head bolts and it seems like it is going a little too far before clicking.


    Good Luck,

    Chris

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    the pioneer EL-7 has worked well for me at least 15 times. i usually use them if a helicoil has failed. i figure that since the helicoil has the smaller o.d., i use it first. it gives me two shots at the same hole. be very sure to drill and tap straight.

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    gn7
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    Quote Originally Posted by A handfull View Post
    There was an older discussion about a Hi Quality Heli Coil repair...I can't find it now...I thought your were involved with that discussion...actually a guy put a nut on the back side to get him by at an event before he got a hold of this special deal...then he never had a problem afterwards...anyway...any recommendations would be great. The head studs are fine...the stock block is just letting go unfortunately. This is an alcohol deal and I do not run water in the block.

    Also...on a side note..SLOW BOYS jet boat blower deal was an interesting discussion...where you suggested that the heads are backing up the flow of the blower...they just plain don't breath enough air...and the boost backs up in the plenum..and power falls off with more boost. Where did he wind up with his new combo?? Anyway...I did see that boat run last year with his old set-up...and it was very impressive...it left very quick and sounded clean. The guy really had it set up nice....I would love to see him drag that boat down to Wheatland this year. Anyhow...thanks for a quality MFG suggestion and maybe a part#.
    sorry. I misunderstoof the opening post. I was under the impresion you had a failed cheap stud not a pulled thread in the block.

    the Keensert, Big Serts, and others require a special tap. I am not familiar with the Pioneer product.
    I like these beause they come in 2 wall thickness and you use a standard tap.
    McMaster-Carr



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    Unhappy o-ringing block after bigsert repairs

    Quote Originally Posted by gn7 View Post
    sorry. I misunderstoof the opening post. I was under the impresion you had a failed cheap stud not a pulled thread in the block.

    the Keensert, Big Serts, and others require a special tap. I am not familiar with the Pioneer product.
    I like these beause they come in 2 wall thickness and you use a standard tap.
    McMaster-Carr
    I am not running water in block. It is o-ringed, and the repair will run into the o ring. Would you try it without re oringing the bock?

    I am only running 12-14 psi on alcohol.

    I wonder if the oringing will have issues going through the inserts.

    What's your take on it?
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    Quote Originally Posted by A handfull View Post
    I am not running water in block. It is o-ringed, and the repair will run into the o ring. Would you try it without re oringing the bock?

    I am only running 12-14 psi on alcohol.

    I wonder if the oringing will have issues going through the inserts.

    What's your take on it?
    UH OH...
    I predict this thread is about to take a turn??
    Wags

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    Quote Originally Posted by A handfull View Post
    I am not running water in block. It is o-ringed, and the repair will run into the o ring. Would you try it without re oringing the bock?

    I am only running 12-14 psi on alcohol.

    I wonder if the oringing will have issues going through the inserts.

    What's your take on it?
    Go for it Matt you should still clear it

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    gn7
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    Quote Originally Posted by wagspe208 View Post
    UH OH...
    I predict this thread is about to take a turn??
    Wags
    Not really, I haven't recovered yet from the fact that the oring grooves are that far out from the bores.



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