Seasonal "How to not burn your bronco to the ground" tech write up. - Ford Bronco Forum
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post #1 of 36 (permalink) Old 11-24-2005, 05:13 PM Thread Starter
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Seasonal "How to not burn your bronco to the ground" tech write up.

Well earlier this week I was warming up the Bronco for work. I kicked the heater on high, when all the sudden LOTS of smoke filled the cabin of the truck. It smelled like burning leaves and really scared the crap out of me. I turned the truck off and opened the doors to air it out (I was about two seconds from calling the fire department), luckily it just smoked some leaves and didn't catch fire. I logged on here and searched. In no time I was at Steve83's supermotors page looking at the culprit (Thanks Steve!). This is old hat to alot of you veterans, but this is my third fsb and I never had this crap happen before. The problem is leaves and small twigs fall through the cowl vent and create a tender box in the hvac system. When the leaves build up on the resister next to the blower motor, they can catch FIRE off the heat of the resister. So here's a little how to that anyone can do:
First remove your blower motor, you'll need a 5/16 socket to loosen the four screws, and it will easily pop out.

Once the blower is out of the way, you'll be able to scoop/vacuum out all the debris. Reach your arm all the way down the inner fender to get all the crap out, just try to get your hand in every nook and cranny the leaves could've got into.

This is all the crap that came out of mine, more than I ever imagined was in there.

Next, use your 5/16 to remove the resister (The red thing) so you can clean it real good

Here's how mine looked when it came out, FULL of dry, flammable leaves!

Here's how it's supposed to look if you don't want to burn your Bronk to the ground

Re-install the resister, and hook the two plugs back in.

Re-install the blower motor and your done!

Since I bought this truck the a/c and heat barely came out the vents, now it blows good and strong.
Now pour yourself a glass of wine that you bought with all the money you saved by not burning your rig to the ground

there is nothing easy about adult life
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post #2 of 36 (permalink) Old 11-24-2005, 05:42 PM
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Hmm I should try that on mine. Maybe someday when it's not 10 degrees outside. Nice write up too. Are all the 80-96's the same?

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post #3 of 36 (permalink) Old 11-24-2005, 05:46 PM
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Good write up...STUPID. I chuckled when I saw the wine glass with the broncos hood open in the background. I'm working on my truck tomorrow, I think I may see how full mine is.

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post #4 of 36 (permalink) Old 11-24-2005, 05:59 PM
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hmm....i might do that tomorra. Since my motor is out it will be super easy. :)

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post #5 of 36 (permalink) Old 11-24-2005, 06:25 PM
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Thats gonna make a good newbie... where is the blower motor resistor located??

1BadBronco
was a81 Bronco Custom. Sold See my superford link for how I built her!
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post #6 of 36 (permalink) Old 11-24-2005, 07:12 PM
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Quote:
Originally Posted by 81Bronk36
Thats gonna make a good newbie... where is the blower motor resistor located??
its the red panel that the wires are connected to. What he took out in his writeup

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Welded 14 bolt, HPKingpin D60 w/ lockright, ZF5, NP205, 4.88 gears, SMPFI 393 w/ EDIS(gufx strat), Chevy 52s Front, Inboarded Chevy 63s Rear, DOM heim steering, DOM cage, Saginaw pump, 3/8" fuel system, 200amp 3G Alternator....

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post #7 of 36 (permalink) Old 11-24-2005, 07:27 PM
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I wasnt asking a ?... that was a statement... I hear that one all the time.

1BadBronco
was a81 Bronco Custom. Sold See my superford link for how I built her!
NOW83 F-250 6.9L IDI, built C-6 1345 D44HD and D70 rear with 3.55 gears. Sag pump, hydroboost, 3G, SD vacuum pump, bumpers, 34" swampers
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post #8 of 36 (permalink) Old 11-24-2005, 07:28 PM
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lol, my bad man...i misread your question. The yams i ate are clouding my reading ability. Those evil yams....

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'85 Bronco......
Welded 14 bolt, HPKingpin D60 w/ lockright, ZF5, NP205, 4.88 gears, SMPFI 393 w/ EDIS(gufx strat), Chevy 52s Front, Inboarded Chevy 63s Rear, DOM heim steering, DOM cage, Saginaw pump, 3/8" fuel system, 200amp 3G Alternator....

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post #9 of 36 (permalink) Old 11-24-2005, 07:29 PM
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leaves

I had a similar problem. I couldn't figure out why I couldn't feel much air comming thru the driver side defroster. Turned out it was almost completely clogged with leaves. Had to remove the dash cap to get at that.

There is a rubber bladder at the bottom on each side of the cowl vent intake, not sure why, to keep the leaves and crap from getting out I guess . I removed the cowl piece and used a piece of stiff wire to loosen the junk up and then vacuumed it out with my shop vac. I think I'm going to put some screening under the intake grill and remove the bladders when I replace the front fenders next year.

I didn't think about the fan or resistor, think I'l take a look at that tomorrow.

Great write up.


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post #10 of 36 (permalink) Old 11-25-2005, 03:08 PM
 
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this was one reason i swapped the cowl to the newer version. it has smaller holes so the bigger leaves do not get in so easy.
here was the old.

here is the new, plus i got 2 extra washers to wash off the dirt and muck. i found out the was a body change and the one i had needed to be modified. i later got an 87-89 and it looks stock.
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post #11 of 36 (permalink) Old 11-25-2005, 06:37 PM
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I was going to check mine today and it turns out I have the tiny holes, thank god, it would have been a beoch to do, very tight in there.

there is no such thing as stupid questions, just stupid people.
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post #12 of 36 (permalink) Old 11-28-2005, 07:36 PM
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That happened to me...it reeked for up until bout 3 weeks ago. It happened the morning of the florida M&G. I never been so scared in my life!!

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post #13 of 36 (permalink) Old 11-28-2005, 07:51 PM
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nice write up...cleaned mine when i changed the resistor.

Tim

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post #14 of 36 (permalink) Old 11-28-2005, 07:52 PM
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So an 87-89 cowl will replace the 80-86 cowl and look stock?

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post #15 of 36 (permalink) Old 11-29-2005, 01:40 PM
 
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yes, in 90 the cowl went flat all the way across so just look at the cowl if it is flat it will not fit without swapping front clips. mike
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post #16 of 36 (permalink) Old 12-22-2005, 05:58 PM
 
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fire

Hey guys I was driving to work today and smoke started to come through the Passenger side defroster vent on top of my dash. I have not checked to see if there is leaves in the blower motor yet but is there anything else that could cause smoke to come out of the vent? I have a 1990 bronco with the newer style wiper cowel so I dont think big leaves could get into my blower. I am worried that the right side of my dash is going to catch on fire on my way home from work tonight. any help would be great! thanks
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post #17 of 36 (permalink) Old 12-22-2005, 07:23 PM Thread Starter
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Holy crap, my old write up came back. Did the smoke smell like burned leaves? If it did you found the right thread, if not........ask Steve83.

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post #18 of 36 (permalink) Old 12-22-2005, 08:55 PM
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im ging to try this tommorow...the air coming out of my vents is pretty light on high

dc

Quote:
I want to convert my 4wd Superduty to 2wd. I can take apart a flashlight in under a minute. So im sure i can handle this
check out the broncos full rebuild
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post #19 of 36 (permalink) Old 12-22-2005, 09:08 PM
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Quote:
Originally Posted by bigblackbronco
I have not checked to see if there is leaves in the blower motor yet but is there anything else that could cause smoke to come out of the vent? I have a 1990 bronco with the newer style wiper cowel so I dont think big leaves could get into my blower.
Quote:
Originally Posted by collinsperformance
this was one reason i swapped the cowl to the newer version. it has smaller holes so the bigger leaves do not get in so easy.
bigblackbronco, read collinsperformance's quote.


1983 FSB 351W Holley 4 BBL 4160 MSD6AL & Blaster 2 Wipers ON / Head Lights ON Control, Head Light wiring upgrade, 96 Lincoln Mark VIII 4200 CFM Electric Fan, 96 Lincoln Mark VIII 3G 130 Amp Alternator, 31x10.5x15, Ford 8.8 3.08:1 rear, Dana 44 3.08:1 front.
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post #20 of 36 (permalink) Old 12-23-2005, 10:15 AM
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Now that you have a few glasses of booze down the gullet...time to take the bronco out for a test drive to make sure all works right?! j/k

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