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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2020 Posts: 24 'Bolter | | 'Bolter Joined: Feb 2020 Posts: 24 | Can anyone tell me what size screws were used to attach the defrost ducts under the dash? I am assuming the screws go in from underneath?
Thank you.
1949 chevy 3100
Scotts IFS
4-link rear
L-31 5.7l vortec
| | | | | Joined: May 2015 Posts: 11,055 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,055 | I'm going to guess they're #8 round head sheet metal screws. Yes, they do go in from underneath. The defrost nozzles (I refer to the hoses as ducts) have a slot on one end, so you can start one screw, fit the nozzle, then install the other screw. Probably 1/2" or less in length. It's been a long time since I took mine apart, so going from memory.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Feb 2020 Posts: 24 'Bolter | | 'Bolter Joined: Feb 2020 Posts: 24 | Klhansen, Thank you for that info. I will get some #8 and try them out.
Love this forum. So many helpful owners on here.
1949 chevy 3100
Scotts IFS
4-link rear
L-31 5.7l vortec
| | | | | Joined: Aug 2010 Posts: 70 'Bolter | | 'Bolter Joined: Aug 2010 Posts: 70 | I put mine in my '53 from the top, worked Ok and probably a lot easier. | | | | | Joined: May 2015 Posts: 11,055 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,055 | I put mine in my '53 from the top, worked Ok and probably a lot easier. Wondering how that worked, unless you used oversize screws that engaged the notches in the nozzles. Or maybe the '53s are different. The head of the screw on the bottom holds the nozzle in position. Here's one of Brad Allen's pics showing the nozzle with a clip on one end and notch on the other. Defrost nozzles
Last edited by klhansen; 03/11/2021 3:16 AM.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Oct 2005 Posts: 4,252 "Hey! I sound like Darth Vader!! | | "Hey! I sound like Darth Vader!! Joined: Oct 2005 Posts: 4,252 | On my '51, you slide the nozzle up under the dash where you have a clip on the nozzle slip over the hole. The other side is pushed up against the dash where there is a small hole next to the nozzle slot that you drive a screw, from the top, in to the body nut attached to the nozzle. | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | | | | | | Joined: May 2015 Posts: 11,055 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,055 | Brad to the rescue. 
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | |
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