Heater Rebuild w/ Pics

scbronco · Dec 16, 2010

i decided to rebuild my heater while i wait on some supplies for the bigger projects. I figured this would be a fairly simple and quick little rebuild, so i took some pics to post up. now i know my poor heater box isnt in that great of shape, but it wasnt quite bad enought o justify getting a whole new box. here is my parts list:

1. New 78' Chevy Blower and Fan-Delphi PN BM10033- $49.99 complete- Auto Zone Item # 942696
2. New Bronco Heater Core-Spectra PN 398016- $20.99- Auto Zone Itme # 144360
3. Black Silicone Sealant- $5.99
4. New Screws (replace rivets in Box) $4.50
5. 8" x 10" peice of sheet metal.

you can see the difference between the chevy fan size and the bronco fan. i expect some pretty intense heat! ;D hopefully very efficient defrost as well...

oh also, it made be hard to see, but i had to make a little mount plate to give the screws that replaced the box rivets something to tap into. i just used the box as a template...

Here are the pics...

scbronco · Dec 16, 2010

completed pics tomorrow...

01JLH · Dec 17, 2010

How about giving us the part number and source for the fan motor and cage unit. Thanks,jlh

sprdv1 · Dec 17, 2010

Very good mod, you'll like it

Heus33 · Dec 17, 2010

Great post - x2 on part numbers and source. The "old" heater upgrade thread has a lot of info on it but its pages and pages long - maybe you can complete the p/n part and send it off to Jon as a tech article.

scbronco · Dec 17, 2010

sure thing, ill get those PN's up tonight, along with the completion pics...

scbronco · Dec 17, 2010

added Part Numbers to Original Post, Pics coming this evening...

stupidboy · Dec 17, 2010

I'm gonna have to do that or get ac, which is easier?

sbeard73 · Dec 17, 2010

Let me know how much better you like the fan. I just done a rebuild on mine with the stocker but if you see a big difference I may do the same upgrade.

scbronco · Dec 17, 2010

assembled pics with no sealant...

scbronco · Dec 17, 2010

not sure what the purpose of the little coil thing in the last two pics... i put it back like it came out, but didnt seal around it incase it supposed to get warm... anybody know waht it does?

stupidboy · Dec 17, 2010

that thing is looking brand new. Someone ought to have a heater rebuilding service.

scbronco · Dec 17, 2010

assembled and sealed... i just seal the outside edges of everything since this sealant seems to set up pretty tight. gotta be able to get it back apart right?

i also put the sealant on the ends of all exposed screw tips, so i dont bloody myself while im installing/removing in the future...;D

Also, my wiring harness for the heater was laying in the floor board when i bought the bronco, so im not sure what goes where, but it looks like the single orange wire goes to the blower motor, while the dual oranges go to the little coil thing in the core cover, and the red and orange together go to the back of the center heat/fan knob/switch... Please, if anybody knows for sure or has a revision to that chime in... im guessing...

also, SBeard73, my bronco is so far from running, its more like garage art right now... i was just doing this as a small project between big headaches... LOL

sbeard73 · Dec 17, 2010

Maybe this will help this is to your switch on the dash.

scbronco · Dec 17, 2010

sorry here they are...

scbronco · Dec 17, 2010

thanks Sbeard, clears it all right up... thats what i was trying to type up there...

sbeard73 · Dec 17, 2010

Glad to help.

NGABronco · Dec 17, 2010

Hey sc, you don't need no stinkin' heater in Sumter!!!!!;D;D;D

Great job and a good write up (with pics)!!!!!

scbronco · Dec 17, 2010

Hey Ben, thanks for the compliment, and your right, i dont need heat here, but its so humid when it rains any time of year that i want some kickin defrost! plus, i thought it would be a fun little project... and it was!

mp · Dec 17, 2010

Your new chevy heater is one wire, and your old orange bullet wire connects to it. you will need to run a ground from one of the four motor mount bolts to the dash. Just did this mod again last week.

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