What should I do about coolant leaks?
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Cadillac Catera and Cimarron Forum Discussion, What should I do about coolant leaks? in Past Cadillac Vehicle Discussion; Hi everyone. I'm having the usual coolant leak problem with my '01 Catera, where the coolant is leaking from the ...
  1. #1
    ZaneKaminski is offline Cadillac Owners Member
    Automobile(s): 2001 Catera Sport
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    What should I do about coolant leaks?

    Hi everyone. I'm having the usual coolant leak problem with my '01 Catera, where the coolant is leaking from the oil/coolant heat exchanger in the V of the engine. I've looked around and determined that the usual solutions for this problem include replacing and re-sealing the oil cooler in the engine, as well as installing an aftermarket cooler. It seems to me like installing a new cooler is the only way to prevent the problem from reoccurring. Am I right, or have people had more luck with just replacing the stock part than I would think?

    As for installing a new cooler, what sort of part should I be installing? Would it be something that connects to the coolant and oil loops? Or is it a radiator-type thing that only connects to the oil line? I've seen one person's setup where he mounted a radiator-looking oil cooler thing on the front underbody of the car. It would seem to me that the oil should be cooled using the coolant, not just a radiator thing, but I really don't know. (Is it unusual that the Catera has an oil/coolant heat exchanger? How is the oil cooled in most cars?) I would prefer a solution that doesn't involve adding anything to the outside of the car, but I mean, whatever's necessary.

    Finally, I have fairly little experience working on cars other than adding oil, replacing spark plugs, etc. I feel confident in my technical abilities, but my background is computer science, not cars. Is replacing the cooler too difficult a task for a beginner or no?

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  3. #2
    marko69 is offline Cadillac Owners Fanatic
    Automobile(s): 2001 Catera Sport, 1990 Porsche 944 S2 cab
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    Re: What should I do about coolant leaks?

    Here's a link for changing the oil cooler. (courtesy of Elvin)
    You can decide for yourself if that's something you can tackle.
    Not too difficult, just takes some time. You might also want to change the thermostat will you're down there.
    http://www.omegaowners.com/forum/ind...493#msg1155493

    Here's an oil cooler from rockauto, the cheapest one on ebay is about the same price.
    http://www.rockauto.com/catalog/x,ca...,parttype,2084

    PS
    If you just bought the car and are having problems with electrical items, do a search here on relay K134 before you do any trouble shooting.

  4. #3
    ZaneKaminski is offline Cadillac Owners Member
    Automobile(s): 2001 Catera Sport
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    Re: What should I do about coolant leaks?

    If I replace it in this way, won't it just become unsealed again and I'll have to fix it all over?

  5. #4
    marko69 is offline Cadillac Owners Fanatic
    Automobile(s): 2001 Catera Sport, 1990 Porsche 944 S2 cab
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    Re: What should I do about coolant leaks?

    I did my oil cooler this way about 3 years ago and haven't had any leaks.
    Also, fyi, a very common problem seems to be a coolant leak from the heater control valve in the back area of the engine. Make sure it's not leaking from there before taking out the oil cooler.

  6. #5
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
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    I got my cooler over ebay for $180 + free shipping year ago, since that time nooooo problems

  7. #6
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
    Automobile(s): 2000 Catera Sport
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    I got my cooler over ebay for $180 + free shipping year ago, since that time nooooo problems

  8. #7
    ZaneKaminski is offline Cadillac Owners Member
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    Re: What should I do about coolant leaks?

    That's reassuring that you guys have had success. I'll try and check the HCV tomorrow. How should I determine if it's leaking? I was thinking I could wrap the part in a paper towel or something and see if it gets wet. Or is that a bad idea for any reason?

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