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Thread: Mystery drainage of radiator?

  1. #1
    nycnftm is offline Cadillac Owners Fanatic
    Automobile(s): 1983 Eldorado
    Join Date
    Jan 2008
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    Mystery drainage of radiator?

    Hello, I had two mechanics say "that is not possible to me" My radiator is leaking into the cabin even though the heater core was removed and bypassed months ago. If I add water to my radiator now, by tomorrow it will be low and the driver's side carpet near my left leg is soaked. I had a pressure test on the engine and they said it is fine and not leaking. I do not see fluid on the ground, or water or smoke out of the tailpipe. How could it be getting into the cabin, if the heater core inlet has nothing connected to it. Please help.
    Andrew


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  3. #2
    Dave S Texas's Avatar
    Dave S Texas is offline Cadillac Owners Enthusiast
    Automobile(s): '87 Coupe DeVille 4.1L FWD(New engine '08) 1981 F100 '03FXDL
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    Austin(area), Tx
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    Re: Mystery drainage of radiator?

    Maybe whatever was used to bypass the core is leaking, if it is in the cabin. Could it be AC condensate and not related to a leak in the cooling system?

  4. #3
    nycnftm is offline Cadillac Owners Fanatic
    Automobile(s): 1983 Eldorado
    Join Date
    Jan 2008
    Posts
    101

    Re: Mystery drainage of radiator?

    It is not the leftover from the old core because that already leaked all over the carpet once before. But the new coolant is coming in. The floor is wet every time I get in it.

  5. #4
    Lithorian's Avatar
    Lithorian is offline Cadillac Owners Enthusiast
    Automobile(s): 1995 Deville 4.9 Liter, 1988 Camaro Iroc-Z 5.0 Liter
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    Re: Mystery drainage of radiator?

    check your oil level, coolant can pour in through the intake, as for water inside, its probably from the the evaporator, if it is definately coolant in the interior i would suspect that your heater core is NOT bypassed, there is no other way coolant will get into your interior.


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