Oil Cooler Leaking?
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Oil Cooler Leaking? in Past Cadillac Vehicle Discussion; hey everyone, new here. I drive a 93 Eldorado Touring Coupe. Had it for about a year now and absolutely ...
  1. #1
    66 elcam is offline Cadillac Owners Member
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    Oil Cooler Leaking?

    hey everyone, new here. I drive a 93 Eldorado Touring Coupe. Had it for about a year now and absolutely love it. the car has developed what appears to be an oil leak from the oil cooler. did a search, couldn't really find if this is a common problem but it appears to be from the fitting. does an o-ring need to be replaced or something? or is it the line?


    attached are some pics



    thanks!
    Attached Images

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    Submariner409's Avatar
    Submariner409 is online now If it won't run, slap in a big stereo
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    Re: Oil Cooler Leaking?

    You shouldn't double post.......

    That looks like a quick connect or flare setup. One of our resident GM Techs will have to answer this one........With that remote cooler I'd let a shop take responsibility........

    Welcome to the Looney Bin !!!

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    Raze's Avatar
    Raze is offline Cadillac Owners Enthusiast
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    Re: Oil Cooler Leaking?

    That's a quick disconnect w/a plastic lock ring inside the fitting that origionally clamps over the flared end of the hose and locks into the metal fitting, there is a simialr plug going into the passenger side tank of the radiator (where the oil cooler is) on later year N* equipped cars. Luckily for you it's pointed down so when the plastic piece becomes brittle with age and cracks oil squirts down and hopefully far enough away from your tire so you don't go skating. On the later years it's directly in line with the serpentine belt so when it breaks you blow oil all over your belt and toss it at 65mph in the middle of rush hour traffic in Atlanta when it's 90 deg outside

    Unsrew the large metal adapter from the cooler, from the top squeeze in the plastic fitting so it'll pop the hose out, go to autozone or advance with the plastic fitting and find a new one. I had to actually buy a whole new metal adapter ($8) to get the right size plastic ring from an LT1 or some such nonsense but they do sell variety packs of rings ($4)...

  5. #4
    CadillacSTS42005's Avatar
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    Re: Oil Cooler Leaking?

    id clean all that off with some brake cleaner 1st and make sure you pinpoint the leak before throwing parts at it
    thats a viable mess and could be coming from the lines itself or maybe the tank...
    at high pressure it has enough force with a small crack to spray everywhere like it has
    check 1st repair once

  6. #5
    66 elcam is offline Cadillac Owners Member
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    Re: Oil Cooler Leaking?

    Quote Originally Posted by submariner409 View Post
    You shouldn't double post.......

    That looks like a quick connect or flare setup. One of our resident GM Techs will have to answer this one........With that remote cooler I'd let a shop take responsibility........

    Welcome to the Looney Bin !!!
    sorry, when i posted it said i was spam and i didnt know if it worked so a tried it again.

    thanks for the welcome.


    ill clean it up and try and pin-point the exact leak and see what parts i need.

  7. #6
    66 elcam is offline Cadillac Owners Member
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    Re: Oil Cooler Leaking?

    ok so its not the o-ring. the leak is at the top of the fitting. the actual cooler tube is leaking.. any thoughts? so i just go with an after market cooler, or oem.

  8. #7
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Oil Cooler Leaking?

    Is that an oil cooler or a trans cooler? I'd take STS2003's advice and clean it up good first to pin point it.

  9. #8
    Necrosan is offline Cadillac Owners Enthusiast
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    Re: Oil Cooler Leaking?

    My 94 Eldorado just developed this issue.
    Gonna try Razes advice in a second and pray it works!

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