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01-09-2010, 08:30 PM
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#1 |
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OutOfMyMind & I'llNeverKnowWhy
Join Date: Apr 2004
Location: Another world, some other time
Posts: 672
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Defroster ducting help
I finally started to tear apart everything to see why the defroster never really blows hard. I can see that there its a large gap between the defrost duct and the main duct where the defrost door is. Looks the the defroster is fully seated at the top of the dash and the main duct seem to be bolted solidly on. Am I missing a part? Even if i lower the defrost duct is looks like it would be a poor fit.
__________________
-Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page  I don't like to save, it's more fun to spend!! |
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01-09-2010, 09:58 PM
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#2 |
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Registered User
Join Date: Oct 2009
Location: Jay, Fl
Posts: 126
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Re: Defroster ducting help
My 86 ductwork doesn't fit very good either. I'm gonna try do do something about it while I have it all torn apart. Not really sure yet how to go about it.
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01-09-2010, 10:00 PM
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#3 |
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Registered User
Join Date: May 2009
Location: Sparks, NV
Posts: 913
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Re: Defroster ducting help
Duct Tape
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Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__
............._____l __\__ ..............l_(O)_ l___(O)] |
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01-09-2010, 10:05 PM
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#4 |
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Registered User
Join Date: Jan 2010
Location: Austin TX
Posts: 32
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Re: Defroster ducting help
I Will try to take pics of mine tomorrow if I can and post them or send them to an email. I havent figured how to put my pics on this site yet.
76 C10 custom deluxe 
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01-09-2010, 10:23 PM
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#5 |
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Dually Pride
Join Date: Jun 2008
Location: NH
Posts: 540
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Re: Defroster ducting help
Im pretty sure its supposed to be like that. I had a problem with lack of air flow too, until i noticed the baffle door right under duct you posted didnt move. the cable is stuck. so i just slid the cable off the retaining nub, and let gravity do the rest
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If I have to explain, you wouldn't understand. '74 Chevy C-30 350/4 speed/dually '94 Ford Ranger |
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01-09-2010, 10:31 PM
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#6 |
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haha, ford guys...
Join Date: Feb 2007
Location: Visalia, CA
Posts: 576
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Re: Defroster ducting help
hahaha! this is how almost ever chevy this year is, mine is the exact same, most simple fix is duct tape... hence the name.... DUCT TAPE.
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01-10-2010, 12:01 AM
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#7 |
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Registered User
Join Date: Aug 2008
Location: pIEDRAS NEGRAS, COAHUILA, MEXICO
Posts: 242
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Re: Defroster ducting help
I think if missing a part, I'll try to upload some pictures tomorrow
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01-11-2010, 10:18 PM
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#8 |
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OutOfMyMind & I'llNeverKnowWhy
Join Date: Apr 2004
Location: Another world, some other time
Posts: 672
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Re: Defroster ducting help
Well I taped it up. Thanks guys.
__________________
-Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page I don't like to save, it's more fun to spend!! |
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01-13-2010, 05:21 PM
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#9 |
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Registered User
Join Date: Aug 2008
Location: pIEDRAS NEGRAS, COAHUILA, MEXICO
Posts: 242
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Re: Defroster ducting help
hey man I was checking in my truck and my duct is just as separate
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01-13-2010, 06:22 PM
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#10 |
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Project Optimus Prime
Join Date: Jan 2009
Location: Dallas, TX
Posts: 346
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Re: Defroster ducting help
Hmmmmmmmmmmmm????? my defroster sucks too, justins 76 let us know if taping everything together helps much at all?? or any ideas
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84 SWB work in progress   89 burb 1500 (parts pig) LOL  08 ford focus (I know, I know) Wifes car  "I said it b4 and i'll say it agian wiring is my worst enemy":devil: 
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01-13-2010, 10:17 PM
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#11 |
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Registered User
Join Date: Jan 2010
Location: Austin TX
Posts: 32
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Re: Defroster ducting help
I will try to post some pics of mine, but mine fits together quite nicely at the bottom. hmmmm..... strange.
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 '76 Long Fleetside 383 motor, 400 trans. Daily Driver for now. Trying to make her nice again..... and of course with very little $$$$. "Dad's Truck" Luis |
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01-13-2010, 10:24 PM
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#12 |
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Registered User
Join Date: Dec 2009
Location: Winston, Ga.
Posts: 240
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Re: Defroster ducting help
I just noticed tis same problem on my 86. Now I know what is wrong. I will check it out on thursday and report what I find.
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In God We trust!!!
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01-16-2010, 06:10 PM
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#13 |
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OutOfMyMind & I'llNeverKnowWhy
Join Date: Apr 2004
Location: Another world, some other time
Posts: 672
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Re: Defroster ducting help
I wiped everything down with rubbing alcohol and used aluminum tape. The backside was the hardest to seal but I did get it done. I notice no air leaks. I also fixed the blend air door so it shuts all the way. It certainly blows stronger now. Before it was useless. Thanks for everyones help.
__________________
-Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page I don't like to save, it's more fun to spend!! |
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01-17-2010, 02:00 PM
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#14 |
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Registered User
Join Date: Sep 2009
Location: ottawa,canada
Posts: 4,550
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Re: Defroster ducting help
The heater in my 86 really blows too, and not in a good way. I've often wondered if there was a way to fix it. I'll have to take a look and see if I have the same problem, and tape it up.
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