Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know - Page 9
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View Poll Results: Select one if you have had a problem with the headgasket the Northstar V8:

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  • 1993

    18 2.34%
  • 1994

    38 4.95%
  • 1995

    13 1.69%
  • 1996

    40 5.21%
  • 1997

    152 19.79%
  • 1998

    169 22.01%
  • 1999

    172 22.40%
  • 2000

    82 10.68%
  • 2001

    57 7.42%
  • 2002

    45 5.86%
  • 2003

    14 1.82%
  • 2004

    1 0.13%
  • 2005

    4 0.52%
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Northstar Engines and System Technical Discussion Discussion, Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know in Cadillac Engine Technical Discussion; 1997 Eldorado Touring 95,000 miles Car is presently at Martin Cadillac undergoing headgasket/headbolt repair. Changed coolant every 3 or 4 ...
  1. #121
    RichF59 is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    1997 Eldorado Touring

    95,000 miles

    Car is presently at Martin Cadillac undergoing headgasket/headbolt repair.

    Changed coolant every 3 or 4 years since new, used only distilled water (no tap water) and dexcool, always added tablets to lower hose.

    Headgasket failed anyway.

  2. #122
    cadillacdriver25 is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    now my STS has it at 67500 mls... very bad so early! well is there something wrong with the engine? I heard the 99 engine wasn´t build perfect GM made a mistake I heard. is that true? so if I reapair the HG does it come again?? Whats the reason for the broken HG?? What kind of coolant should i use? only the Dexcool or an other one which is also allowed?
    How about the waterpump? does it also brake down soon after the HG? are the pellets important to do it into the new coolant??

    THX a alot

    Olly

  3. #123
    Rafterd's Avatar
    Rafterd is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    98 STS 115k miles. Very well taken care of. Perfect condition now. Will most likely fix it.

    Bill

  4. #124
    mechanix's Avatar
    mechanix is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    '97 DeVille - Head gasket failure at 65K miles. RH head, cyl. #7. I time-serted the block and drove it another 20K when a 12" crack appeared along the LH cyl. bank. Full of new Dexcool, good to -45F, it just popped like an egg. I got a used '94 block out of an STS - when torquing the heads down, the head bolts pulled out. Now I am time-serting THAT block. The engineers who designed the Northstar engine (and I know they read these posts) may be brilliant engineers in their own right. But the Northstar engine has to be the greatest folly of their careers. And it will certainly go down as one of the biggest mistakes in automotive history, along with the Corvair. Those guys should all be taken out and shot with slugs melted down from failed Northstar blocks! *lol* I curse the day that I was stupid enough to buy one. Never again!

  5. #125
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    The more I read threads like this the more I just LOVE my LT1.... I almost bought a 95 NorthStar Deville.... I am SOOO glad I didn't. And that makes me sad to say, I really was hoping to get one and enjoy it, but the liability of it isn't worth the pain. I guess if I had a ton of cash to throw at it.

    A friend of mine has a 99 SLS that his is blown the head gasket now, advice for him? He is wanting to keep the car, but not to thrilled about tossing $4000 on it to fix. Tossing in a LS1 IS an idea.

    Has it been done at all yet? Maybe using a Corvette PCM to hook up with the electronics? Vettes typically have FDC and such.

  6. #126
    dwight.j.carter's Avatar
    dwight.j.carter is offline Cadillac Owners Connoisseur
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    I highly recomend you guys read this post. Aj did an excellent job explaining why the head gasket issue exists and a potential means of fixing it for a long time if not for good.

    http://www.cadillacforums.com/forums...ilure-fix.html

  7. #127
    dwight.j.carter's Avatar
    dwight.j.carter is offline Cadillac Owners Connoisseur
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    really if you look at it 97,98,and 99 where the bad years for the problem.

  8. #128
    Ur7x is offline Cadillac Owners Connoisseur
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Wow, you are right!

    Those three year amount to almost 70% of the problem...

    Why do I suspect that some lawyer at GM is aware, and worried, about this fact.

    Has anyone considered a class action? Didn't something like this happen with intake gaskets on V6 Buicks?

  9. #129
    ggerbino is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    I have a 1997 Cadillac Concours. My sister in law overheated 3 mos ago and had a new radiator, water pump and thermostat installed. Car was fine for a month then overheated again. After sitting a bit and pouring in coolant, all the warning lights/messages disappeared. I drove the car for two hours Friday and it overheated again. I read the messages carefully and limped to a service station. They replaced the thermostat saying it did not have a gasket around it. When they test drove car it overheated again. After further testing they said the head gasket was blown and that I should replace the entire engine. Does this sound right?

  10. #130
    couldntmakeitup is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Quote Originally Posted by ggerbino View Post
    I have a 1997 Cadillac Concours. My sister in law overheated 3 mos ago and had a new radiator, water pump and thermostat installed. Car was fine for a month then overheated again. After sitting a bit and pouring in coolant, all the warning lights/messages disappeared. I drove the car for two hours Friday and it overheated again. I read the messages carefully and limped to a service station. They replaced the thermostat saying it did not have a gasket around it. When they test drove car it overheated again. After further testing they said the head gasket was blown and that I should replace the entire engine. Does this sound right?
    Sounds dead on to me. Looks to me like this problem has been a nice revenue stream for all GM dealers involved. JUNK...JINK...JUNK.. You can add my 1997 SLS Seville to the shit pile list. What a piece of shit.

  11. #131
    couldntmakeitup is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    1997 SLS Seville... Replaced water pump, crossover gaskets, drinks Dexcool like a phucking pig. 140k miles..Not sure what Im gonna do. May just run the phucker over double ditch into the missouri river. What a complete pile of shit

    Cadillacs..what a story. They hold NO VALUE at all. Its no wonder you can buy the shit piles for 2 or 3 k. There a dime a dozen, and for a very good reason. there complete pieces of shit.

    If you dont mind paying 5ok+ for a car thats gong to lose 75% of its value at 50,000 miles it may be just the car for you. As long as people bend over and let GM stick it in deep, nothing will change. GM is a horrible company and there STOCK tells the whole story. Wont be surprised if they no long exist in a couple of years...there getting butchered by Toyota.

    So you can add me to the list of customers that have been bent over by GM. Its just a shame that they stick it in so deep. Complete piles of shit. NEVER TOUCH the shit piles again.

  12. #132
    lukky4u's Avatar
    lukky4u is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    98 deville at 91K. yeah yeah shoulda coulda woulda got something else but anyway i still owe almost 6grand on this thing. not sure what to do. i'd like to try to take this on myself. im a pretty good wrench but i dont have a garage or a lift. anyway welcome to the club

  13. #133
    white97deville is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    My '97 Deville had a head gasket failure at 117,000 miles. Only 1 bolt pulled the threads out but I time-serted all before re-assembly. Used information from this site to do it all.

  14. #134
    Destroyer's Avatar
    Destroyer is offline Cadillac Owners Master
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Well I sure am glad I'm not the only one that feels the N* Caddy's are pure evil shit bombs. I mean, those who haven't experienced their wrath praise them to high holy hell....................until IT happens and then they wind up here bitching about it.

  15. #135
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    I hate to say it, I am just soooo glad I bought a Fleetwood with a LT1...... 248K and counting..... Original engine/trans, never opened up.....

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