Heater Core Replacement 1978 w/Air - FSB Forums
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post #1 of 6 (permalink) Old 09-17-2011, 02:35 PM Thread Starter
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Join Date: Aug 2011
Location: Maryville, TN
Posts: 442
Bronco Info: 1978 Ranger XLT Stock
Heater Core Replacement 1978 w/Air

First time replacing one of these and I did it in two hours using this tutorial:


I was a bit intimidated after reading posts about ripping the A/C out for good and Haynes manual saying the job was too complicated for home mechanics and techs charging $600 to do the job, etc. I am not a whiz of a wrench turner but I did the job with basic tools.

A good tip I read was to remove the glove box liner and the passenger seat. That helped a bunch. Anyway, I wanted to pass it along to help others who might be hesitant about this job. The previous owner bypassed the core and left it that way for who knows how long. I am glad I'll have heat and defrost this winter!

Sent from my Autoguide iPhone app

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post #2 of 6 (permalink) Old 09-17-2011, 10:38 PM
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Join Date: Mar 2011
Location: New Haven, KY
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Bronco Info: 79 bronco, 460, sitting on 35" mud terrains
Very useful link. Thanks for sharing.
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post #3 of 6 (permalink) Old 09-17-2011, 10:44 PM
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Join Date: Sep 2011
Location: Conway Arkansas
Posts: 38
Bronco Info: 1987 6" lift, 33" tires,302 engine,crazy driver!!
I know it was not fun doing it in my 86 and I'm going to say it ain't much better on a 79
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post #4 of 6 (permalink) Old 09-18-2011, 08:15 AM
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Location: Manassas, VA
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Bronco Info: 79 Custom - 460, C6, NP205, 35"BFGs
Nice, thanks for sharing this.
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post #5 of 6 (permalink) Old 09-18-2011, 09:26 AM
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Location: muskegon mi
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Bronco Info: 78 351m with some stuff, dodge 8 lug outers, disc br 14bff, 4" deavers, 35" mtz's
wow, that's a good link.
The PO of my bronco cut a hole to replace the HC from under the hood then covered it with sheetmetal
I wonder if the thermocouple is installed correctly

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post #6 of 6 (permalink) Old 01-31-2013, 01:38 AM
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Join Date: May 2007
Location: Bonanza, AR
Posts: 82
Bronco Info: 78 Bronco Ranger XLT
I am guess this is what happened to my box, Its all torn up. How hard is it to replace the whole box under the hood with a used one. I'm not looking forward to this.
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