Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know - Page 14
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View Poll Results: Select one if you have had a problem with the headgasket the Northstar V8:

Voters
757. You may not vote on this poll
  • 1993

    18 2.38%
  • 1994

    38 5.02%
  • 1995

    13 1.72%
  • 1996

    40 5.28%
  • 1997

    151 19.95%
  • 1998

    167 22.06%
  • 1999

    170 22.46%
  • 2000

    81 10.70%
  • 2001

    56 7.40%
  • 2002

    41 5.42%
  • 2003

    14 1.85%
  • 2004

    0 0%
  • 2005

    3 0.40%
Multiple Choice Poll.
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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; Bump....
  1. #196
    Jesda's Avatar
    Jesda is offline Super Moderator
    Automobile(s): An endless stream of Sevilles.
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Bump.

  2. #197
    70torino429 is offline Cadillac Owners Member
    Automobile(s): 1996 seville sts
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    my 96 seville sts had them go at 79,000 miles, a shame such a nice car and it still looks gorgeous

  3. #198
    Dead STS is offline Cadillac Owners Member
    Automobile(s): 90 Deville - 280k miles. 94 STS - 232k miles. (Blown)
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    My 94 Seville STS began to go at around 143k miles.
    I drove it until 232k miles. The only reason that I had to park it was because of the crossover gaskets failing (I think). Water was pouring from that side of the engine. The engine was still strong and ran smoothly and it did not smoke or run rough unless it was in limp home mode which happened a couple of times. I used to keep gallons of water and coolant in the trunk. Whenever it got hot I would pull over and wait a few minutes then fill it up and off I went.
    I also used a lot of the Bars Leak powder. I would still race cars off the line while looking in the rear view at the steady stream of coolant pouring out.
    I COULD NOT KILL THIS CAR. Beleive me, I tried. I would feed it more tap water and it would be fine for 50-100 miles. I estimate that the engine temperature exceeded 260 degrees and overheated two hundred + times. I still have it but have never had the time to fix it. The body and interior are in better condition than my 97 STS. It is at 162k miles with no engine problems.

  4. #199
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Damn......drop the cradle, overhaul the top end, do an ECM mild tune, and drive it forever. Use Jake's head studs......it will never leak again. The car's worth the work..............

  5. #200
    allgm's Avatar
    allgm is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    [/SIZE]1998 ELDORADO ETC 144,000 miles

  6. #201
    Eldo1953's Avatar
    Eldo1953 is offline Cadillac Owners Enthusiast
    Automobile(s): 53 Eldo, 54 CDV, 74 FWB 96 FWB (sold),1998 STS(sold), 03 ESV
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Quote Originally Posted by Dead STS View Post
    My 94 Seville STS began to go at around 143k miles.
    I drove it until 232k miles. The only reason that I had to park it was because of the crossover gaskets failing (I think). Water was pouring from that side of the engine. The engine was still strong and ran smoothly and it did not smoke or run rough unless it was in limp home mode which happened a couple of times. I used to keep gallons of water and coolant in the trunk. Whenever it got hot I would pull over and wait a few minutes then fill it up and off I went.
    I also used a lot of the Bars Leak powder. I would still race cars off the line while looking in the rear view at the steady stream of coolant pouring out.
    I COULD NOT KILL THIS CAR. Beleive me, I tried. I would feed it more tap water and it would be fine for 50-100 miles. I estimate that the engine temperature exceeded 260 degrees and overheated two hundred + times. I still have it but have never had the time to fix it. The body and interior are in better condition than my 97 STS. It is at 162k miles with no engine problems.
    So you are saying you drove 90k miles on a blown HG??!

  7. #202
    Dead STS is offline Cadillac Owners Member
    Automobile(s): 90 Deville - 280k miles. 94 STS - 232k miles. (Blown)
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Yes, my 94 STS went approximately 90,000 miles with a partially blown head gasket.
    I left out the worst part of my Northstar blown hg/pulled head bolt story.
    At around 141k miles the crankshaft got screwed up due to oil starvation caused by a piece of a gasket that got sucked up against the screen where the oil leaves the oil pan. This happened before I became a student of Bobinski the Northstar Guru. So when the engine was out I had no idea to tell my mechanic that we needed to Timesert the engine even though I had not experienced any problems with the cooling system. The overheating began shortly after crankshaft repair. This was my mechanics first and last Northstar.

    Kelly
    94 STS 232k miles
    97 STS 162k miles

  8. #203
    bigtone's Avatar
    bigtone is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    My 98 Deville developed head gasket problems at 81k miles. I found Number one cylinder leaking when I pressurized it with 100 psi air. The rear head bolts were a bit looser than the front, so I can assume that the threads were pulling. Timeserted the block, have about 1k miles on it so far with no problems. I did the entire job in the car, see my post under Northstar topics for pics.

  9. #204
    pinkbird53 is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    1997 Cadillac Deville d'Elegance
    180,000 - just this week diagnosed with the DREADED HEAD GASKET LEAK,
    which may have been going on for some time now.

    Over past year, I've had to keep topping off the coolant; and have had some external leaks - I've essentially had the entire cooling system replaced; water heater, radiator, heater hoses, radiator cap, overflow tank, thermostat and couplings, etc., etc.

    Last weekend, the car overheated; first I got the 'check coolant level' notice - checked the coolant temp, which was 248. I immediately stopped, let it cool, then limped the car back to the repair shop I have been using. While limping back I got the 'engine overheated', 'idle engine', 'stop engine', and 'change engine oil' lights come on.

    There are leaking seals at both ends of the metal tube that runs the coolant through the engine. The mechanic (and as far as I know, this is the FIRST TIME anyone did this test) - did find exhaust fumes in the coolant tank, indicating the DREADED HEAD GASKET LEAK. The dealership has also since confirmed these findings.

    The repair will be about $3,000; and I have decided not to do it. I'll be buying a replacement car.

  10. #205
    str8bucs is offline Cadillac Owners Member
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    1998 Seville SLS 86K

  11. #206
    mike sts is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    had a 94 STS first engine went at 55000 miles cracked head, they replaced it under warranty the second engine went 100,000 miles before it was leaking oil, fouling plugs with oil and coolant, coolant leak, not sure if head was cracked probably was junked the car

  12. #207
    mgturbo1's Avatar
    mgturbo1 is offline Cadillac Owners Member
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    Unhappy re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    1999 STS 71000mi

  13. #208
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Anyone junking one over a head gasket, let me know, I would like to get one to explore a LS1 swap....

  14. #209
    mrlacy is offline Cadillac Owners Fanatic
    Automobile(s): 99 Deville, 06 DTS Performance
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    Had my 99 deville crap out with 127000 miles...it is in the shop as we speak getting put back together. Former GM Tech doing the work and said that these engines do this due to cadillac using a smaller head bolt since 94-95. He said GM knew about this problem during their test prototype northstars back as late as 87.

  15. #210
    Shouse is offline Cadillac Owners Fanatic
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    re: Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

    I agree that the older n*'s aren't around to vote anymore.
    We're probably all but extinct now.
    Anyways, '94 STS. 135k. No problems yet (knocks on wood).
    Not to say that this car hasn't had it's problems (it has) but no
    HG yet or signs as I can tell. After Reading this thread I'm shakin in my boots though. I love to trade it off for a Challenger but cash flow is quite limited.
    Quite the sticky situation.

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