New owner of 93 - high mileage car
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Cadillac Allante Forum Discussion, New owner of 93 - high mileage car in Past Cadillac Vehicle Discussion; Recently purchased a 93. It's showing 171K on the odometer and I have no history. Here's my question........ given the ...
  1. #1
    smith356's Avatar
    smith356 is offline Cadillac Owners Member
    Automobile(s): allante
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    New owner of 93 - high mileage car

    Recently purchased a 93. It's showing 171K on the odometer and I have no history. Here's my question........ given the mileage, do I assume it's gone this far and must have had needed fixes ? Read an old post saying these are interactive engines ( if timing chain breaks, kiss it goodbye ). Set me to thinking - water pump, starter, etc. Are these all serious/ expensive repairs ? I would love some input from those of you who have dealt with the Northstar in the Allante. My oil pressure is good.. coolant temp is good... power is awesome. I have seen a lot of comments about reaching a point where they become more valuable as parts than they are as a car... interesting. Anyhow, would love some input on how you have fared with this motor over the years........... Jim

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  3. #2
    macsr is offline Cadillac Owners Member
    Automobile(s): 93 Pearl Red Allante
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    Re: New owner of 93 - high mileage car

    Greetings Jim, I also am a new owner of a 93, mine last january. With only 94000 on mine I have not experienced any problems. The only major problem that I have heard about on the Northstar was with the cooling system and the need to change the antifreeze regularly. I have repaired my top pull down motor, changed coil pac's and plugs and wires. Other than that no problems. The later made 93's are better as all the early production problems were implemented later in the production. I have been told that the models with the serial numbers 127XXX and up are really the later ones. Also there is another Allante site that i have listed below where there is a wealth of information on these cars. You can have no question that 4 to 10 guys (and maybe a few girls) wont try to help you with. I would recommed that you go there and also ask that group the same question. I havent found a subject matter on my Allante that someone there has not experienced or found the fix for.
    Good luck with your car, I use mine for a daily driver and love the feel and the power. Its just incredible. Mike

    http://allante.us/cgi-bin/yabb/YaBB.pl

  4. #3
    babylac89's Avatar
    babylac89 is offline Cadillac Owners Fanatic
    Automobile(s): 1993 Cadillac Allante-Northstar
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    Re: New owner of 93 - high mileage car

    Welcome Jim...as Mike said, the cooling systen is #1 on a 1993, so if you don't know the history, I would flush the system, just for insurance. And be sure to crush up and drop in three GM Cooling System Seal Tabs!

    Chief



  5. #4
    jminor is offline Cadillac Owners Member
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    Re: New owner of 93 - high mileage car

    great information. What is the best way to change the fluid, using the plastic adapters at home or having it serviced using the proper machine? Is there a best antifreeze to use?

  6. #5
    billc83's Avatar
    billc83 is offline Cadillac Owners Connoisseur
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    Re: New owner of 93 - high mileage car

    The Northstar engine requires DEX-COOL coolant, not the normal green stuff.

    Keep an eye on your engine temperature. Head gaskets are the big issue with the Northstar - if they're blown you will lose coolant and start overheating. Do not let the engine overheat! It can't take it. If you catch the headgaskets early, one of the vendors on here sells studs which make it better than factory.

    Sounds like you have lucked out so far. Keep a watchful eye on the coolant temperature and enjoy the car.

  7. #6
    macsr is offline Cadillac Owners Member
    Automobile(s): 93 Pearl Red Allante
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    Re: New owner of 93 - high mileage car

    I would recommend that you do a little research on the type of coolant needed for your 93. My research led me to the green antifreeze for my 93. Cadillac may have changed later for the northstars but in 93 they came with green. I have read pros and cons on both colors, green and orange, so be diligent in your search and good luck. Mike

  8. #7
    macsr is offline Cadillac Owners Member
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    Re: New owner of 93 - high mileage car

    Quote Originally Posted by jminor View Post
    great information. What is the best way to change the fluid, using the plastic adapters at home or having it serviced using the proper machine? Is there a best antifreeze to use?
    The best information I have seen is to just open the drain plug on the lower right side of the radiator (bottom). The best way to get to is to pull the right fan motor. Let it all drain out and just replace. Dont really have to "flush" system. As Chief said be sure to use the GM pellets. Good Luck Mike

  9. #8
    babylac89's Avatar
    babylac89 is offline Cadillac Owners Fanatic
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    Re: New owner of 93 - high mileage car

    I've only used the DEX-COOL in mine.

    Chief

  10. #9
    smith356's Avatar
    smith356 is offline Cadillac Owners Member
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    Re: New owner of 93 - high mileage car

    Thanks, everyone. I'm a little more relaxed now about it. I will flush the system and get some pellets. Do I go to GM or are there other options to buying them ? Jim

  11. #10
    babylac89's Avatar
    babylac89 is offline Cadillac Owners Fanatic
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    Re: New owner of 93 - high mileage car

    Quite a few distributors sell them on line!

    Chief

  12. #11
    Hawker40 is offline Cadillac Owners Member
    Automobile(s): 1993 Allante
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    Re: New owner of 93 - high mileage car

    My 1993 has 42000 miles and is on sale on CL for 15750. No hardtop.
    Hawk

  13. #12
    babylac89's Avatar
    babylac89 is offline Cadillac Owners Fanatic
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    Re: New owner of 93 - high mileage car

    Please post pix, and CL in what city? Usually the pix in CL are a max of only four. The pix are what raises curiosity to want to see the car in person.

    Chief

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