98 ETC Head Gasket project started today... - Page 4
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Northstar Engines and System Technical Discussion Discussion, 98 ETC Head Gasket project started today... in Cadillac Engine Technical Discussion; Post #5 has some pics. http://www.cadillacforums.com/forums...00-blocks.html...
  1. #46
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    Re: 98 ETC Head Gasket project started today...


  2. #47
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    Re: 98 ETC Head Gasket project started today...

    Those look nothing like my little "cracks"... Is that your point?

    ----------

    Just to clarify...


  3. #48
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    Re: 98 ETC Head Gasket project started today...

    No point Faded. Just posted for informational purposes. Don't quote me, but I think that is a common place for it to crack if it is going to. I can't tell if yours are cracks or casting irregularities.

  4. #49
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    Re: 98 ETC Head Gasket project started today...

    Well none of the little fissures that I have noticed are anywhere near a stress point like a bolt or anything so I am getting less and less worried about it. Maybe AJ will see the pics and comment.

  5. #50
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    Re: 98 ETC Head Gasket project started today...

    You could call Joe at Midwest Cadillac at 847-878-5676. He found several of them, even showed me one. That's where I got the impression that they are usually in the same place, but he would be much better to talk to than me.

  6. #51
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    Re: 98 ETC Head Gasket project started today...

    I have some dealings with a guy who is a retired GM mechanic... He actually retired young and now works for a famous retired race car driver. Anyway, he's top notch in every way. I was telling him about my engine and the small fissures and he dismissed the notion that it was something to be concerned about. He said a troublesome crack would be unmistakable. he also said the pooling was very common and that he has seen an inch or more of "varnish" in the intake valley in cars with 20k miles. Needless to say, I am feeling much more at ease now than when I first discovered the little cracks.

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    Re: 98 ETC Head Gasket project started today...

    Quote Originally Posted by Faded Crest View Post
    I have some dealings with a guy who is a retired GM mechanic... He actually retired young and now works for a famous retired race car driver. Anyway, he's top notch in every way. I was telling him about my engine and the small fissures and he dismissed the notion that it was something to be concerned about. He said a troublesome crack would be unmistakable. he also said the pooling was very common and that he has seen an inch or more of "varnish" in the intake valley in cars with 20k miles. Needless to say, I am feeling much more at ease now than when I first discovered the little cracks.
    I agree, but if you have the engine out and apart anyway, I'd consider sanding/grinding as much of them away as possible. You don't want to give aluminum a starting point for a crack.

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    Re: 98 ETC Head Gasket project started today...

    Quote Originally Posted by 89falcon View Post
    I agree, but if you have the engine out and apart anyway, I'd consider sanding/grinding as much of them away as possible. You don't want to give aluminum a starting point for a crack.
    Do you mean like with a dremel? Grind away the crack if possible? Interesting.

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    Re: 98 ETC Head Gasket project started today...

    Well I have the first head off... The left one. There was standing coolant in cylinder #6. Here are some pics.






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    Re: 98 ETC Head Gasket project started today...

    Right side head gasket was much worse... Eaten all the way through in spots and standing coolant in all 3 cylinders that were down.









    And of course everybody loves to see theses pics!




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    Re: 98 ETC Head Gasket project started today...

    Looking at the pictures of those HG's makes me wonder if the problem might not be shitty HG's. That is a damned shame and should not happen.

  12. #57
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    Re: 98 ETC Head Gasket project started today...

    That's a lot of coolant in the cylinders..... I wonder how good of a reputation the Northstars would have had if these kind of problems are found on less cars. Otherwise one heck of an engine...

  13. #58
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    Re: 98 ETC Head Gasket project started today...

    Quote Originally Posted by Ranger View Post
    Looking at the pictures of those HG's makes me wonder if the problem might not be shitty HG's. That is a damned shame and should not happen.
    I absolutely agree Ranger,.... At least in this case. All but 2 or 3 bolts came out clean and dry. 2 had some block thread attached, but they were all pretty tight. I needed a long pipe to break them loose. I would guess that the head gaskets went first and then the 2 or 3 bolts that were weak were a result of coolant leaking in. But I didn't really see any rust on the gaskets and the metal rings were all there and solid, but the gasket composite was very weak... It reminded me of wet cardboard.

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    Re: 98 ETC Head Gasket project started today...

    Marc - I agree with this part:

    I would guess that the head gaskets went first and then the 2 or 3 bolts that were weak were a result of coolant leaking in.

    ...but...

    I kind of doubt that there was routinely that much coolant in the cylinders when started in AM - I would think it would hydro lock the engine...or snap a connecting rod (Jake has reported that). Also, with coolant leaking into one or more cylinders, we normally see the bad ones "steam cleaned" of carbon. Also, the typical N* HG problem is not coolant in the combustion chamber as much as it is combustion gases in the cooling system. Could the coolant in the cylinders have ended up there due to/during the disassembly?

    Looks like you used the same lift point on the body as I did - ran the chain around the bumper struts?

    I sent your info to the man that purchased the rear seal installer from me - his name is Steve and he said he will be in touch with you when done with it.

    Richard Moore

  15. #60
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    Re: 98 ETC Head Gasket project started today...

    Thanks Richard, Yes Steve contacted me.

    On the coolant in the cylinders, who knows... The car was awful to try to get started cold. It would spit and sputter and would run the battery almost all the way down before finally firing up. How would that much coolant get into the cyliners during disassembly? The thing is there was only a little water in one cylinder on the other side...

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