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foggy windows

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Old 03-04-2015, 04:06 PM
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skullz92!
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Default foggy windows

hey guys I have a question that I need help with.
when I turn my defroster on I get a funny smell and my windshield tebds to fog up. im not sure what could be causing the problem. I have read similar posts on here and allot of people tend to say heater core needs replacing. Is there anything I can do to diagnose the problem myself.
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Old 03-04-2015, 04:56 PM
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88 orangepeel notch
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You already diagnosed it correctly. Fogged up windshield and a sweet smell of heater core failure. I've heard it's quite a chore to replace, but mjr has a trick to doing these without pulling the dash. If you ask nicely, he may share........

Welcome to the forum by the way.

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Old 03-04-2015, 11:27 PM
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mjr46
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pull the dash and replace the heater core
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Old 03-05-2015, 12:51 PM
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thanks guys.. I appreciate this. I have never done a heater core and if this MJR. person is willing to share a secret I would gladly appreciate it. if not I understand. also I went home and turned the defroster on again and it did not fog up. it only seems to do it when there is moisture in the air. this is my first fox body and my second mustang. although the first mustang I had was a Frankenstein and had a mixture of different years on model parts holding it together.
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Old 03-06-2015, 09:24 AM
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no secret on a 87-93.....if the car has or had a/c........you have to pull the dash out/back enough to gain access to the heater box which has to be pulled away from the firewall to remove the heater core cover
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Old 03-06-2015, 05:07 PM
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skullz92!
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gotcha.. I see what you are saying. now does that mean I am going to drain antifreeze and stuff. if so where are the easiest spots to drain the heater lines. or is it pretty much unclamp hoses to heater core and let it drain itself. I am gonna replace all radiator hoses as well. any other tips or advice guys again I appreciate it.
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Old 03-06-2015, 05:23 PM
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88 orangepeel notch
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There is a drain valve at the bottom of the radiator, on the engine side. That will drain everything.
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Old 03-06-2015, 05:24 PM
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There is a drain plug on the bottom of radiator unscrew and open cap to let air in for better flow
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Old 03-06-2015, 07:07 PM
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mjr46
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why waste time draining the radiator, get 2 hose clamp plier or two needle nose pliers and pinch off the lines or loop them together if you have a radiator flush kit tee
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Old 03-08-2015, 05:04 PM
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Had the same issues last year on mine it is a full days work but its defently your problem. Dont worry about the coolant to much but make sure you have some rags on hand and keep track of all the screws as you pull the dash apart. There are alot of good videos on youtube on how to do this step by step
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