68 Deville Front window fogging
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500, 472, 425, 368 Discussion, 68 Deville Front window fogging in Cadillac Engine Technical Discussion; Ive noticed that lately wen I park my car the window will fog up with all the windows down to. ...
  1. #1
    68deville&99escalade is offline Cadillac Owners Member
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    68 Deville Front window fogging

    Ive noticed that lately wen I park my car the window will fog up with all the windows down to. And you can also see if your sitting in it or driving, you can see steam coming out of the dash & fogging it up. When I turn on the defrost it gets 10X worse and then takes forever to go down. Even to wipe it takes a long time with a piece of kleenex. U got to wipe over the same spot like 6X.

    Anyone know what this is?

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  3. #2
    lux hauler is offline Cadillac Owners Connoisseur
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    Re: 68 Deville Front window fogging

    leaking heater core would be my guess.

  4. #3
    tripleyellow78cad's Avatar
    tripleyellow78cad is offline Cadillac Owners Fanatic
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    Re: 68 Deville Front window fogging

    Quote Originally Posted by 68deville&99escalade
    Ive noticed that lately wen I park my car the window will fog up with all the windows down to. And you can also see if your sitting in it or driving, you can see steam coming out of the dash & fogging it up. When I turn on the defrost it gets 10X worse and then takes forever to go down. Even to wipe it takes a long time with a piece of kleenex. U got to wipe over the same spot like 6X.

    Anyone know what this is?
    Your heater core must have started leaking , i had the same problem in my 78 coupe

  5. #4
    68deville&99escalade is offline Cadillac Owners Member
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    Re: 68 Deville Front window fogging

    What should I do then? Just bypass it? I only drive the car in the summer. So heat isnt important to me. Will this fix the problem.

  6. #5
    TheCanadianWannabe is offline Cadillac Owners Member
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    Re: 68 Deville Front window fogging

    I was experiencing fogging too and had to bypass the heater core on my '68 Deville because it was leaking like crazy from 2 different spots. I know I'll need to fix it sometime and I was thinking about patching the leaks with some kind of epoxy compound. Any suggestions or should I start looking for a new heater core? Are they fixable/rebuildable?

  7. #6
    lux hauler is offline Cadillac Owners Connoisseur
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    Re: 68 Deville Front window fogging

    there should be no problem by-passing it.

    i'm not sure how hard the core is to get to in your car but the ones that i've done were a PITA. i wouldn't worry about trying to fix one....just get a new one. to me, it wouldn't be worth the trouble.

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