Head gasket leak. Studding half an engine?
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Head gasket leak. Studding half an engine? in Past Cadillac Vehicle Discussion; I have a head gasket leak in my 2000 Deville. Exhaust gases in the coolant. A bore scope shows the ...
  1. #1
    sbergerson is offline Cadillac Owners Member
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    Head gasket leak. Studding half an engine?

    I have a head gasket leak in my 2000 Deville. Exhaust gases in the coolant. A bore scope shows the coolant leaking into one of my front cylinders. In the morning, I also have a miss on that cylinder until the coolant burns off.

    Anyway, I need some advice. I want to put studs in the block to fix the problem, but I don't want to take the time to remove the motor, etc... Can I stud the front bank only while the engine is still in the car? I don't have any issues with the rear head at this time.

    Thanks in advance for your input.

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Head gasket leak. Studding half an engine?

    It might work - for a day or a year. The best all-around approach is to do the entire job at the same time with the same parts, studs, sealants, tools, work process. I personally would NOT recommend doing the job halfway.

    A large consideration is that the stud job places a different torque loading on the heads and cylinder block than the original bolt sequence - a halfway job would stand the very real chance of warping the head(s) and/or block. A terminal fault.

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    amunderdog is online now Cadillac Owners Connoisseur
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    Re: Head gasket leak. Studding half an engine?



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    Ranger is offline Cadillac Owners Member
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    Re: Head gasket leak. Studding half an engine?

    Quote Originally Posted by sbergerson View Post
    Can I stud the front bank only while the engine is still in the car?
    Yes. Not advisable, but can be done.

    Food for thought.
    If the rear bank goes next month/year, are you going to repair it or walk away from it and the money spent on the front bank? AND, if that happens and you elect to repair it, the cost will probably be pretty near what it would have cost to do both now (assuming you are paying for labor). Just another something to think about in making your decision.

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    stoveguyy is offline Cadillac Owners Connoisseur
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    How common is it for both head gaskets to leak? Can anyone here provide proof that both gaskets leaked on their motor or is it just assumed? It's a VEE motor, 2 heads, 2 gaskets. BOTH always leak together?

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    Re: Head gasket leak. Studding half an engine?

    Yeah ^^^ - That's Mike Lawson's (Kentucky) video work - inserts, not studs. The right (rear) head won't go over the studs with the engine in the car.

    No, both head gaskets don't normally fail on the Northstar - or in any other V- engine, for that matter. Nothing says they can't fail together, but not normally.

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    Caddy-EaRL's Avatar
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    Quote Originally Posted by stoveguyy
    How common is it for both head gaskets to leak? Can anyone here provide proof that both gaskets leaked on their motor or is it just assumed? It's a VEE motor, 2 heads, 2 gaskets. BOTH always leak together?
    Although it may not be common, it's really irrelevant. You buy a head gaskets set, and only use one of the gaskets? That's like buying a set of brake pads and only installing one side...you have the intake off, the timing cover, the timing chains all removed, And you're only gonna replace one head gasket? Sorry I know its my opinion, but it's utter nonsense. It would be the same as pulling just the one head, finding one bolt has pulled the threads and just studding or certing that one hole. I do several head gasket jobs on all makes and models and would never consider doing just one. It's impractical.
    That just my opinion lol

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    Ranger's Avatar
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    Re: Head gasket leak. Studding half an engine?

    Quote Originally Posted by stoveguyy View Post
    How common is it for both head gaskets to leak? Can anyone here provide proof that both gaskets leaked on their motor or is it just assumed? It's a VEE motor, 2 heads, 2 gaskets. BOTH always leak together?
    No. It's just one of those things that you generally do both at once and get it over with to avoid having to go in again.

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    sbergerson is offline Cadillac Owners Member
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    Re: Head gasket leak. Studding half an engine?

    Thanks for all the replies. Good food for thought.

    I would much rather do all 20 holes at the same time, but was just thinking about the "If it's not broke, don't fix it" philosophy, and the fact that if I did the whole job, it is going to take me over a week, while I should be able to fix the problem in a day if I just fixed the front head. I am planning on fixing this myself... I love the car and want to keep it.

    Steve

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    stoveguyy is offline Cadillac Owners Connoisseur
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    Read post #1. He wants to pull head in car. It's his labor. He works for free. If he wants to leave rear head alone, go for it. Give it a try and see how it works out. You buy a stud kit for 300-400 and use 1/2. Or buy a timesert kit for 300 and put in 10 serts. Sell sert kit when finished. Yes, u pull both heads when motor is out of car. Why not. But motor is in car. Rear head is a pain

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    Caddy-EaRL's Avatar
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    He also asked or advise....

    He was advised

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    Re: Head gasket leak. Studding half an engine?

    Quote Originally Posted by sbergerson View Post
    Thanks for all the replies. Good food for thought.

    I would much rather do all 20 holes at the same time, but was just thinking about the "If it's not broke, don't fix it" philosophy, and the fact that if I did the whole job, it is going to take me over a week, while I should be able to fix the problem in a day if I just fixed the front head. I am planning on fixing this myself... I love the car and want to keep it.

    Steve
    ---------------------
    I should be able to fix the problem in a day if I just fixed the front head.

    don't take this the wrong way -
    but I think you are either overestimating your mechanical ability -
    or underestimating the complexity of the Northstar motor -

    its going to take you several hours just to get to the timing chains -
    and you can't just "slip them off the sprockets" -

    I can understand your reasoning behind trying to do just the front head -
    and you MIGHT be able to do it in one weekend - but not one day -

  14. #13
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    Re: Head gasket leak. Studding half an engine?

    Quote Originally Posted by sbergerson View Post
    Thanks for all the replies. Good food for thought.

    I would much rather do all 20 holes at the same time, but was just thinking about the "If it's not broke, don't fix it" philosophy, and the fact that if I did the whole job, it is going to take me over a week, while I should be able to fix the problem in a day if I just fixed the front head. I am planning on fixing this myself... I love the car and want to keep it.

    Steve
    As long as you are going in eyes wide open and know the pitfalls and are willing to take your chances, go for it. That said, I have to agree with Bass. Not sure if you'll finish this in a day unless this is not your first rodeo.

  15. #14
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    Re: Head gasket leak. Studding half an engine?

    Quote Originally Posted by sbergerson View Post
    I love the car and want to keep it.
    Then do it properly and fix all 20 bolt holes. There's no question about it. There are reasons why they sell 20 studs in a package...

    The two Northstars I repaired all had #1 cylinder gasket failed. No point to have half of the engine repaired, just to see the other side fail in the near future. Not guaranteed to fail, but not promising to not fail either.

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    Re: Head gasket leak. Studding half an engine?

    "The two Northstars I repaired all had #1 cylinder gasket failed".


    Ironically, ones I've taken apart all have had cylinder number one issues. I wonder what the deal is with cylinder number one.........

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