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Northstar Engines and System Technical Discussion Discussion, Sucessful Northstar head gasket repair in a bottle in Cadillac Engine Technical Discussion; Originally Posted by Papi_MaC Having that many miles on the engine, then filling the system with gobble-gook, you will likely ...
  1. #46
    osu411yamaha is offline Banned
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    Re: Sucessful Northstar head gasket repair in a bottle

    Quote Originally Posted by Papi_MaC View Post
    Having that many miles on the engine, then filling the system with gobble-gook, you will likely have to opt for a rebuild rather than just a HG job when it fails. I would suggest selling the car while it still runs and moving on to the next.
    Let me get this straight. You simply think he is masking a problem? Even worse you think he should screw someone over by immorally selling them the vehicle while the temporary fix is still masked? The ease with which you wrote what you said suggests to me you have experience with this type of behavior. Twinbopilot does not strike me as that type of guy.

  2. #47
    Papi_MaC's Avatar
    Papi_MaC is offline Cadillac Owners Member
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    Re: Sucessful Northstar head gasket repair in a bottle

    Quote Originally Posted by osu411yamaha View Post
    The ease with which you wrote what you said suggests to me you have experience with this type of behavior.
    Actually, I bought my Eldorado with high mileage knowing that it had head gasket issues. If he would rather run it into the ground than sell it on the cheap to someone willing to actually fix the car, that's his choice. But when the real problem with that engine rears its ugly head, it seems the junkyard would be that cars next stop; rather than a true repair.

    I suggested he sell it, not to dump it on some poor soul who doesn't know what they're getting into. You are fairly quick to accuse someone of being malicious, osu411yamaha. Honestly though, idgaf what you think

  3. #48
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: Sucessful Northstar head gasket repair in a bottle

    Papi-Mac's suggestion to sell the car had no hint whatsoever of dishonesty or unfairness. If one were to sell a Cadillac with a failing head gasket, the condition of the engine should be fully disclosed to the buyer, if the seller is aware there is indeed a problem, or even thinks there is. A blown HG should be confirmed before any attempt to sell, to be honest, because a $15 thermostat could mean the difference between selling a car for $500 and selling a car for $5000.

    I fully understand Papi-Mac's statement- either fix it right, or sell it to someone who will at a cost that reflects the engine's condition.

    I know from experience, I bought my '97 with blown HG's and the owner knew about it. I asked him what he was going to buy next and he said "A 2001 Deville. The 2000s don't have as many problems". LOL I still would have bought the car for $3100, but it should have been half that or less. I also buy quite a few parts cars and fixer-uppers. The amount of people who tell me "it just needs a thermostat" or something along those lines is amazing.

    I run in to it all the time, a customer brings me a car he's just purchased after getting it to pass inspection, buying plates/registration, and then realizing he can't drive 60MPH without the car overheating. Anyone with any sense of decency will never sell a car knowing it needs a $2000 repair job without disclosing it. Any undue accusations that any fellow forum members would advise this is frowned upon. We don't do stuff like that here.

  4. #49
    Destroyer's Avatar
    Destroyer is offline Cadillac Owners Master
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    Re: Sucessful Northstar head gasket repair in a bottle

    I was extremely honest about selling my '98 Deville. I had '06 STS wheels/tires on it and many new parts as well. I put an ad on Craigslist, described the car, the H/G problem and I even referred to it as a POS in the ad. Sold it for $1600 but had more than twice that in repair bills up to that point plus the initial purchase price of $4300. Evidently I sold it to the owner of a used car lot cause just a couple of days later it was on a lot. A couple of weeks later the lot was out of business.

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    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: Sucessful Northstar head gasket repair in a bottle

    Thats the way to do it Destroyer. You might have lost some $$$ but you can still sleep at night with a clear conscience.

    Car dealers can be the worst. I had one bring me a 98 STS for HG repair. Partially paid with a business check. It bounced.

  6. #51
    Destroyer's Avatar
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    Re: Sucessful Northstar head gasket repair in a bottle

    Quote Originally Posted by 97EldoCoupe View Post
    Thats the way to do it Destroyer. You might have lost some $$$ but you can still sleep at night with a clear conscience.

    Car dealers can be the worst. I had one bring me a 98 STS for HG repair. Partially paid with a business check. It bounced.
    Actually a lot of people responding to my ad thanked me for being up front and honest about the car. It was still fully driveable and would not over heat for at least 20 or so minutes but I would not do that to anyone. I was just glad to see it go.

  7. #52
    turboguy52 is offline Cadillac Owners Member
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    Re: Sucessful Northstar head gasket repair in a bottle

    Well it was good while it lasted, buy my 99 deville is back to square one. Pushing out all the coolant and overheating. But the good news is i did get a check from crc for double my money back. So guess what i bought two more bottles of the same stuff because i got like 5k miles the first round, so why not??? I know im not stupid i worked on heavy equipment 13 years i know i'm just buying time and guming up the cooling system but i'm a do it yourselfer and come spring i'm tearing into this baby because i love a good challenge, and i love my caddy, thanks to all who read this and good luck with your caddy's.

  8. #53
    jeffrsmith is offline Cadillac Owners Fanatic
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    Re: Sucessful Northstar head gasket repair in a bottle

    Whatever it takes! Good luck.

  9. #54
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    Re: Sucessful Northstar head gasket repair in a bottle

    Quote Originally Posted by twinbopilot View Post
    HA HA HA

    I have no connection whatsoever with K&W. I'm just a plain old Cadillac owner. I did notice some guys on one of the other Cadillac forum sites are also having success with this product. Google if you are interested - I wouldn't want to link to the "competition".

    I'm not saying this repair is going to last forever, but it made an un-drivable car drivable again. Even if it only lasts a few months, I'm satisfied. Gives me time to figure out my next move car-wise.

    I will continue to post updates every so often. If anyone else tries it, let us know your results.
    sounds like you now have a town car.

  10. #55
    Kidcadillac68 is offline Cadillac Owners Member
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    Re: Sucessful Northstar head gasket repair in a bottle

    Gang, let me ask you this...1998 Sedan DeVille, 178k miles. Runs great. The other day it displayed the "low coolant" message and I tossed in Peak 50/50 premix (I just put in what I had leftover in the last jug used in the '68). I then drove the car from indianapolis IN to Springfield IL and back (450 miles at 70 mph). Temp typically runs from 199-204 and this trip was no different. Runs great, no overheating. The next time I drove the car it states "Low Coolant" again. I stick about a half gallon of pre-mix into her to fill it to the top. Both times when I opened the surge tank, there was a tiny bit of pressure there. The car has never gotten above 205 ( I know the head gasket story and watch the temp like a hawk). Any clues as to what this could be without it being a head gasket? Or does this fit "the profile".

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    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: Sucessful Northstar head gasket repair in a bottle

    Pressure is normal when warm, a bit. No overheating. Coolant loss. I'd be pressurizing the cooling system and then checking for external leaks. It could be in the beginning stages of HG failure- but it may be something as simple as a cracked outlet on the coolant resevoir, or a rusty heater line..... start with the simple stuff first.

  12. #57
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Sucessful Northstar head gasket repair in a bottle

    ..................and you DON"T fill it to the top !!! The proper level is half full, cold. Warming coolant expands a LOT, so if you fill the reservoir to the top, as the engine heats up the coolant expands and has nowhere to go, so it happily blows out the reservoir overflow. This sequence continues until the system stabilizes at a level which allows the coolant to expand and maintain 16 psi throughout the system without lifting the pressure cap relief: The system is designed to run under pressure - that's what raises the boiling point of 50/50 coolant from 218 degrees to 265 degrees.

  13. #58
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    Re: Sucessful Northstar head gasket repair in a bottle

    If you did not overheat on a trip like that the HG's are probably just fine. Common leak points are a cracked radiator side tank, cracked surge tank, purge line nipple on the surge tanks (as Jake suggested). Dried Dex leaves a whitish chalky residue. Look for that.

  14. #59
    ponyboyt is offline Cadillac Owners Enthusiast
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    Re: Sucessful Northstar head gasket repair in a bottle

    had to add 2 literes of coolant when i changed the oil a few days ago. It was randomly popping low coolant message and going away on its own. Ive had no sign of fluid on the ground, and thelast few weeks ive been idling it in the mornings cause te ticking (piston slap? -10c out!)scares me till it goes away when the temp gage starts to finaly move. I dont use Dex, what am i looking for? It has green with 2 litres added of universal. Now im worried... the shop that did my oil wasnt too good... when i say "DONT PUT WASHER FLUID IN I HAVE 20 JUGS AT HOME" and i see 2 liters on my bill... well ya.

    Could be a slow leak, im not gona check it every day cause its too hard to judge how fast its going. I figured i'd just hit trip-reset and wait for the message to come back.

  15. #60
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: Sucessful Northstar head gasket repair in a bottle

    Oddly enough Submariner, I had a customer who kept coming calling me telling me he was losing coolant after I installed a reconditioned engine in his Deville. He kept insisting his head gaskets were gone again. Insisted his temp spikes of 225F were not normal. He would not give up when I told him the temp was normal, and to check for coolant leaks - so I had him drive two hours to my shop. Gave it a bit of cooling time. I was going to do a pressure test on his cooling system and opened the resevoir. Nice and full. I asked the customer "how much coolant are you losing? Because your resevoir is still full-" He had a look and told me it was low. He said "I always fill it to the top" ............

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