99DeVille_NrthSt*r's Project Thread
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Northstar Engines and System Technical Discussion Discussion, 99DeVille_NrthSt*r's Project Thread in Cadillac Engine Technical Discussion; Well I have been reading everyone else's project threads (eyewonder & Bills have been spectacular) and I'm deciding to start ...
  1. #1
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    99DeVille_NrthSt*r's Project Thread

    Well I have been reading everyone else's project threads (eyewonder & Bills have been spectacular) and I'm deciding to start up my own, just to keep all my pics and questions in one place as to not muck up the forums.

    Just to quickly catch everyone up on the projects long history, 4 years ago when I was 16 I bought this 99 DeVille with 130k on the clock and fell in love. Well when she hit 135k she started over heating, I went through the phases of denial replacing the radiator, water pump, surge tank, etc. until I just accepted, it had a blown head gasket....
    Anyway, pulled the motor out the top studded the heads and sealed the lower end, put it back in, timing was off, no spark...
    Dropped the cradle, opened up the timing case 1 of the tensioners were blown. Rebuilt the timing case (new tensioners, new shoes the works) put the motor back in.. No oil pressure........
    After that I was out of funds and out of gas, I packed the car away and there it has sat for the past 3 years.

    Now I am resurrecting this project and dropping the cradle once more, I'm going in and redoing pretty much everything aside from the head gaskets. Re-sealing the bottom end, replacing parts that have been ruined due to sitting (electrical harness is shot, air ride is probably shot, fuel rails are pretty bad)

    I'll be posting pictures of the projects current state later on tonight so look forward to that.

    QUESTION -- is there anyway to get that damn rear main seal out without dropping 150 200 bucks on buying the tool? My normal tool rental outlets don't have it, last time i did this I had access to an old GM techs tool collection, this time I'm not so lucky.

    If there's not a backyard way of getting this thing off, are there any forum members in Arizona near the Glendale area that would be willing to rent one to me?

    Thanks so much in advanced guys, it's been a long time since I have wrenched on the Caddy and I'm finding it's not just like riding a bike, I'm sure you folks will be answering quite a few questions for me so thank you all so much

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  3. #2
    Faded Crest's Avatar
    Faded Crest is offline Cadillac Owners Connoisseur
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    Re: 99DeVille_NrthSt*r's Project Thread

    If you are separating the lower case, you can do that and simply pluck out the rear main seal... Otherwise you will need the extractor tool or devise one of your own.

  4. #3
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    Just a few pictures from both last weekend and earlier today, I'm removing the half case now, will report back later..














  5. #4
    bill buttermore is offline Cadillac Owners Fanatic
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    Re: 99DeVille_NrthSt*r's Project Thread

    My 98 had an older-style lip seal when I tore it apart. It just slid off the crank when I split the case. If you have a newer type seal that has been pressed onto the crank you can buy a removal tool on e-bay for about $25. Or, you can use a few self-tapping sheet metal screws along the axis of the crank and apply a slide hammer or careful leverage to pry the seal off. Be careful. Think how much it will cost if you mess up the sealing surfaces on the block or the crank. Makes $25 seem cheap.

    The $150-200 is for the tool that presses in the new style cartridge seal. You can replace whatever you have with an old-style lip seal that will just tap in, but nobody does this. Why? Because the old lip seals were notorious for leaking.

  6. #5
    Faded Crest's Avatar
    Faded Crest is offline Cadillac Owners Connoisseur
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    Re: 99DeVille_NrthSt*r's Project Thread

    Wow, you're moving fast!

  7. #6
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    Thanks for the replies guys, it sure is awesome to be working on this car again I got the oil pan and the half case separated today but it got to dark to take pics I'll try and get some tomorrow before work.

    Basically the plan now is to put some work into drilling and tapping out quite a few holes that I mucked up back when I was 16 and moving way too fast. Then I need to get together a parts list for the motor do I can start ordering parts the next few pay days. Then it's on to cleaning up all the gasket surfaces and re-assembly.

    After the motor is situated I'll start addressing body issues, the motor compartment has broken plastic everywhere, also I need to look into some suspension issues really gonna lean on you guys hard when it comes to the air ride, I've never worked on something like that before.

    Also for those of you that saw my Electrical Harness thread I got ahold of Jake and he says he has a 97 that he is sending to the scrap yard and he said he could probably pull what I need off of that car, problem is we are only 90% sure everything is the same on that harness, can anyone confirm?

    Thanks guys!!

  8. #7
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    Quick pics before work!









    Studs still in place and they are gonna stay there, if I never see the tops of those pistons again it will be too soon.



    And the 4t80e to top it all off.. Seems like I spent a lot more time separating this time around


  9. #8
    Faded Crest's Avatar
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    Re: 99DeVille_NrthSt*r's Project Thread

    Yikes, the crankshaft counterweights look a little crusty, how long did it sit? And what is that black grease around the lifters?

    I gotta hand it to you, at the pace you're moving you will have it back on the road this weekend!

  10. #9
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 99DeVille_NrthSt*r's Project Thread

    I hope the black goop around the cam followers is assembly lube...........and that crank needs serious careful cleaning.............

  11. #10
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    It's sat for the past 3 3 and a half years, definitely a lot of cleaning to be done, that and getting up the funds to order parts will be the longest part of this repair I imagine.

    As for the black goop you hit the nail on the head sub, that is 3 year old assembly lube, of course all that will be gone and replaced with new when I start putting everything back together.

    Thanks for the compliments on the pace guys, tryin to keep it up, gotta start drilling and tapping these bolt holes later this week or this weekend so more pics to come!

  12. #11
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    Little more progress today, pulled the rest of my harness (what a nightmare that was) also removed the remainder of the AC system (also a nightmare) as it has sat open for years and will need to be replaced.

    As I pulled away the black plastic housing against the firewall it basically disintegrated in my hands, hopefully I can find a replacement.. Is this piece still produced new?

    A couple pics of the morning progress...

    The housing...



    The harness..







    AC and Firewall with everything removed...







    That's all for today folks!

  13. #12
    Ranger's Avatar
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    Re: 99DeVille_NrthSt*r's Project Thread

    As I pulled away the black plastic housing against the firewall it basically disintegrated in my hands, hopefully I can find a replacement.. Is this piece still produced new?
    Not that I am aware of. I think you are going to have a LOT of trouble finding a replacement.

  14. #13
    99DeVille_NrthSt*r is offline Cadillac Owners Member
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    I figured it would be an issue... Thanks Ranger.

  15. #14
    bill buttermore is offline Cadillac Owners Fanatic
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    Re: 99DeVille_NrthSt*r's Project Thread

    That's a junkyard item, for sure.

  16. #15
    97EldoCoupe's Avatar
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
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    Re: 99DeVille_NrthSt*r's Project Thread

    When I do scrap that '97 I'll let you know if the HVAC cover is in good condition.....that is if you do have the time to wait.


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