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Cadillac Seville / Cadillac Eldorado Forum Discussion, coolant behind driver tire under floor pan in Past Cadillac Vehicle Discussion; Your radiator core is aluminum; the end tanks are thermoplastic. They're held on with a skrillion bent fingers - and ...
  1. #16
    Submariner409's Avatar
    Submariner409 is online now If it won't run, slap in a big stereo
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    Re: coolant behind driver tire under floor pan

    Your radiator core is aluminum; the end tanks are thermoplastic. They're held on with a skrillion bent fingers - and there's a formed seal ring between the core ends and the tanks.

    The tanks seem to develop hairline cracks with age. Although a radiator shop CAN replace only the end tanks, the best bet - with a 14 year old radiator - is to replace the whole enchilada.

  2. #17
    Jwither's Avatar
    Jwither is offline Cadillac Owners Member
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    Re: coolant behind driver tire under floor pan

    Quote Originally Posted by kaceyseldo View Post
    GREAT!!!! Radiator end gasket?
    Pressure test.

  3. #18
    kaceyseldo's Avatar
    kaceyseldo is offline Cadillac Owners Fanatic
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    OK. I'll try it. 18 psi?

  4. #19
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    You can go up a little higher, ~20 for a test.


    B

  5. #20
    kaceyseldo's Avatar
    kaceyseldo is offline Cadillac Owners Fanatic
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    Cool. I'll report back.

  6. #21
    kaceyseldo's Avatar
    kaceyseldo is offline Cadillac Owners Fanatic
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    Update: pressure tested it again, (second time since October) and I can't find the damn leak. IT EVADES ME!!!!

  7. #22
    naif is offline Cadillac Owners Connoisseur
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    Re: coolant behind driver tire under floor pan

    May only happen when hot. Maybe get some coolant dye and a UV light, and look for it?

  8. #23
    kaceyseldo's Avatar
    kaceyseldo is offline Cadillac Owners Fanatic
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    Coolant dye?

  9. #24
    vincentm's Avatar
    vincentm is offline Cadillac Owners Connoisseur
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    Re: coolant behind driver tire under floor pan

    Quote Originally Posted by kaceyseldo View Post
    Coolant dye?
    sigh*

    http://lmgtfy.com/?q=coolant+dye

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