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Northstar Engines and System Technical Discussion Discussion, Root Cause of Head gasket Failure and a Fix? in Cadillac Engine Technical Discussion; www.northstarperformance.com...
  1. #136
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Root Cause of Head gasket Failure and a Fix?


  2. #137
    Pete1996 is offline Cadillac Owners Fanatic
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    Re: Root Cause of Head gasket Failure and a Fix?

    Has anyone noted if it is the front or rear bank that fails more often?

  3. #138
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Root Cause of Head gasket Failure and a Fix?

    Quote Originally Posted by Pete1996 View Post
    Has anyone noted if it is the front or rear bank that fails more often?
    No rhyme nor reason - some bolt holes fail, some don't. Some theorize that two cylinders, adjacent to each other in the firing order, might be questionable but that doesn't seem to hold water either.

  4. #139
    tateos's Avatar
    tateos is offline Cadillac Owners Connoisseur
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    Re: Root Cause of Head gasket Failure and a Fix?

    Quote Originally Posted by submariner409 View Post
    No rhyme nor reason - some bolt holes fail, some don't. Some theorize that two cylinders, adjacent to each other in the firing order, might be questionable but that doesn't seem to hold water either.
    "doesn't seem to hold water" - very funny Sub!

  5. #140
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Root Cause of Head gasket Failure and a Fix?

    Quote Originally Posted by AJxtcman View Post
    Norm always has them on Ebay
    Search: NORTHSTAR ENGINE NS300L HEAD BOLT THREAD REPAIR KIT

    The Head Gaskets come from. I would call them to make sure they fit the application. I know they fit 93 to 99. They may have other years also
    Norm has improved his kit http://www.huhnsolutions.com/


  6. #141
    MaduraMi is offline Cadillac Owners Member
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    Re: Root Cause of Head gasket Failure and a Fix?

    Just installed the Stud Kit from Northstar Performance in my '99 Deville. I looked at all of the different options and just figured that since the pricing wasn't all that different between the various kits when you add in the cost of a new set of head bolts I'd go with the studs. Racing engines all get studded and I figured those guys must know what they're doing. When I had questions I was able to call and speak to Jake who didn't seem to be in a hurry and took plenty of time with me. I have driven a thousand miles since the repair with some WOT and long distances on the freeway and my temps have been rock steady. The motor purrs now. I'm very satisfied and confident that I won't have to revisit this issue again with this car. Now that I've done one I wont be afraid to do it again. If anyone has any questions about the process feel free to ask.

    Paul
    76eldodude and 76eldodude like this.

  7. #142
    98eldo32v's Avatar
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    Re: Root Cause of Head gasket Failure and a Fix?

    AJ,

    Nice posts. I can appreciate all the effort you put into the detail descriptions. I haven't gone through this section yet, but I will. You left some very good information.

    Thanks

  8. #143
    98eldo32v's Avatar
    98eldo32v is offline Cadillac Owners Connoisseur
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    Re: Root Cause of Head gasket Failure and a Fix?

    Here are Jake's studs that I received for my eldo.

    I took pictures of two studs, the plate and it's mounting hardware.

    If you notice the mounting hardware has two sets of different size bolts. It's obvious the smaller of the two are the original size bolts.

    Look at the larger bolts and the thread pitch. Look at the studs. The larger end of the stud is what is getting bolted into the block, now compare that to the fine thread on the mounting bolt(smaller threaded mounting bolt).

    It's night and day.

  9. #144
    studebaker is offline Cadillac Owners Member
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    Re: Root Cause of Head gasket Failure and a Fix?

    The stud concept seems to make more sense than using bolts.

    Far greater strength, plus the torqueing action of clamping down force takes place without twisting on aluminum threads.

    Studebaker

  10. #145
    98eldo32v's Avatar
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    Re: Root Cause of Head gasket Failure and a Fix?

    Precisely.

    Why take the chance of ruining the threads when you can tighten down the nut/washer combination?

    In the end I guess it boils down to your preference. In my case, it's studs.

    I'm now deciding whether to use that cometic multi layered steel gasket after reading AJxtcnman's post.

    I was comtemplating it already but now he's almost shoved me in the corner with his pictures of the factory headgasket "crunching up" in certain spots.

    I plan to keep this car a while and I'm NOT going back in to do this repair again anytime soon.

    I like to fix it and forget it.

  11. #146
    luminazkidd21's Avatar
    luminazkidd21 is offline Cadillac Owners Member
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    Re: Root Cause of Head gasket Failure and a Fix?

    So my 01DTS has blown its gaskets, 99K never over heated, I want to do the studs and the composite gasket but because of my work and where i live theres no way id be able to do it on my own..Can ANYONE reccomend a shop between Austin or San Antoino that can do this work??? I LOVE MY DTS and makes me ill at the thought of getting rid of it

  12. #147
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: Root Cause of Head gasket Failure and a Fix?

    I'm not the best with Texas geography but there's a shop in Dallas who will do the work for you. North Texas Performance. Also Crest Cadillac in Plano, TX.

  13. #148
    Submariner409's Avatar
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    Re: Root Cause of Head gasket Failure and a Fix?

    Quote Originally Posted by 97EldoCoupe View Post
    I'm not the best with Texas geography but there's a shop in Dallas who will do the work for you. North Texas Performance. Also Crest Cadillac in Plano, TX.
    Jake, he posted this somewhere else, too. I think there were a couple of replies concerning Texas shops.

  14. #149
    luminazkidd21's Avatar
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    Re: Root Cause of Head gasket Failure and a Fix?

    Jake, he posted this somewhere else, too. I think there were a couple of replies concerning Texas shops
    Yeah I found a listing for the shop in Dallas. I appericate all the help guys! I really do!

  15. #150
    caddypit is offline Cadillac Owners Member
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    Re: Root Cause of Head gasket Failure and a Fix?

    Very informative,

    I have a 95 sts, timeserts where done about 90,000 mile ago and it’s now leaking again, with your history in this problem would it be possible to do additional repairs at this point? I used to be a machinist so do as much as possible myself if possible and if having the specialty tools

    Thanks

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