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  •  » What is Evap Core Case Made From

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    9/11/2013 3:00 PM  #1

    William_F
    FYI FORD Member

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    From: Dallas, TX
    Registered: 4/12/2013
    Posts: 17

    What is Evap Core Case Made From

    I will be replacing my heater core soon as it has burst. I have decided that I might as well pull my evap core case and clean it up at the same time as it is somewhat banged up.

    Originally I thought it was metal and thought I would be able to get by with simply stripping the old paint away, clenikng and repainting. On closer inspection I see that it is plastic or fiberglass so it won't be that easy. I am trying to figure out what the best method of stripping, cleaning and filling the chips in the material is going to be.

    Can anyone give me some insight  into what this is and the best way to go about restoring the surfaces?

    Also while I've got it apart is there any way to test the evaporator core to ensure there is no leakage or restrictions? If there are this would be a good time to replace it.

     

    66 Coupe, 289 v2,(upgraded to v4) c4 auto, with p/s and ac
     

    9/11/2013 4:18 PM  #2

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,491

    Re: What is Evap Core Case Made From

    Is this on your 66?  The heater box is fiberglass.  The evaporator would be in the underdash hang-on AC unit if so equipped.

    See my page http://www.mustangsteve.com/heatercore.html  on how to test a heater core for leaks.  Even if you put in a new one, you should test it.

    If the evaporator really is what you are talking about, the 66 units are pretty bulletproof.  You can easily test it with compressed air and a couple of hardware store fittings in an tank of water.

    Last edited by MustangSteve (9/11/2013 4:20 PM)

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/11/2013 4:29 PM  #3

    William_F
    FYI FORD Member

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    From: Dallas, TX
    Registered: 4/12/2013
    Posts: 17

    Re: What is Evap Core Case Made From

    Heater core is definately leaking. Passenger side carpet soaked in coolant and I saw the coolant dripping from the heater box.

    I wanted to pull the evap case and restore it while I was at it since it is dinged up and showing it's age. I figured pulling that out would make getting the new plenum in easier and I could do the cosmetic repairs to the heater box and evap case at the same time.

    Any tips or ideas on how to restore the fiberglass exterior? I was thinking body filler, sand and paint. However as I have found on all my projects thus far it is rarely as simple as it seems when I get down to it.

    66 Coupe, 289 v2,(upgraded to v4) c4 auto, with p/s and ac
       •Thread Starter
     

    9/11/2013 4:35 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,491

    Re: What is Evap Core Case Made From

    Evap case is fiberglass, old and brittle.  I just cleaned mine up and painted it black Rustoleum 7777.  Bondo should work well to fill nicks.  Another thing I did with my heater box was to coat every surface on it with dynamat.  I did not coat anything that shows, just mainly the fan case.  It made it so quiet you could not even hear it.

    Now I have removed it and converted over to a Vintage Air system.  Still like the underdash units, though, and they work very well.  Be sure to oil your shaft bushings on the AC blower.  Stand the motor on end and put a few drops of oil on the bushing and let it soak in, then repeat a few times, then turn it over and do the other end.

    Heater motors can be lubed but one end is sealed.  A tiny drilled hole in the top of the motor's bearing surround will let you get some oil in it.  Then use a center punch to slightly depress the area around the hole, clean it and put a dab of RTV on it.  I have rescued near-stuck motors using this method.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/11/2013 6:00 PM  #5

    Bullet Bob
    Senior 24-7 FYI Addict

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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,923

    Re: What is Evap Core Case Made From

    You'll find, William, that there is very little on a classic Mustang that can't be fixed, or at least greatly improved, with dab of RTV and shot of Rustoleum 7777.

    BB

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    9/11/2013 7:01 PM  #6

    Hornman
    Senior 24-7 FYI Addict

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    From: Mansfield, Texas
    Registered: 4/01/2013
    Posts: 1,568

    Re: What is Evap Core Case Made From

    William_F wrote:

    Any tips or ideas on how to restore the fiberglass exterior? I was thinking body filler, sand and paint. However as I have found on all my projects thus far it is rarely as simple as it seems when I get down to it.

    If the fiberglass box looks dried out you can reconsolidate it with the liquid meant to resurface corregated roofing panels. Most hardware stores carry it. If there are missing pieces, like the corners, then build new corners with fiberglass. Line the inside withpolyethylene sheet and install the core to provide backing. After the corners are rebuilt, finish normally, grind, bondo, prime, paint.
     

     

     

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