Anyone restore A/C Duct Air ("diverter box") flappers? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 03-03-2016, 11:56 PM

Nice work at a reasonable price and I know someone interested. Hopefully I'm not breaking any board rules here.

F.A.A.benny · 03-04-2016, 04:10 AM

I consider that a throw away item once the flapper door breaks. Sucks because they aren't exactly cheap either. With it being made out of plastic, and the way the whole diverter box is constructed (and also being made out of plastic), there isn't much that can be done. Although I have seen some attempts at fixing the door with wood, sheet metal, and glue. I have only "restored" those that have a good flapper door

**Papa Smurf** · 03-04-2016, 08:01 AM

I just bumped up an old thread where I showed how to make a permanent repair to the flapper. saves a ton of money and keeps your truck original. Look under "air regulator question".

F.A.A.benny · 03-04-2016, 10:16 AM

Quote:

Originally Posted by Papa Smurf

I just bumped up an old thread where I showed how to make a permanent repair to the flapper. saves a ton of money and keeps your truck original. Look under "air regulator question".

Just looked at your pics. That's the cleanest way I've seen it done. Great way to save a nice chunk of change.

100%Chevy · 03-04-2016, 03:51 PM

Quote:

Originally Posted by Papa Smurf

I just bumped up an old thread where I showed how to make a permanent repair to the flapper. saves a ton of money and keeps your truck original. Look under "air regulator question".

I just used your method! Finished it about an hour ago and it works perfect!
Thank you!
Mike.

**71CHEVYSHORTBED402** · 03-04-2016, 06:30 PM

Observation: I've seen a few NOS diverter boxes and they all have one thing in common, which is the pin on the lever is more narrow than the original from my truck. Really, the entire lever isn't built quite as well.

Don't know if any of you guys have experienced problems, and would be interesting to hear, but I do know of one member whose pin broke when he tried to attach the cable wire.

F.A.A.benny · 03-04-2016, 06:46 PM

I've noticed the same thing.

**71CHEVYSHORTBED402** · 03-05-2016, 01:33 AM

Quote:

Originally Posted by 100%Chevy

I just used your method! Finished it about an hour ago and it works perfect!
Thank you!
Mike.

What I can't visualize about the method is that flapper is controlled by the hinge, which is controlled by the lever etc.. How is the lever able to work properly? Seems the piece of sheet metal would have to sit tightly around the hinge. Any play and it won't operate. I'm probably missing something....

If it matters, the rubber around my hinge is wasted. I can spin the lever and it doesn't lock, which brings me to my next question. If it's handy, which direction should the pin side of the lever face, and the position of the flapper, when you lock it down? I think I know, but confirmation would be great.

Here's your thread. Thanks Pappa: http://67-72chevytrucks.com/vboard/s...d.php?t=338890

100%Chevy · 03-05-2016, 11:02 AM

Quote:

Originally Posted by 71CHEVYSHORTBED402

What I can't visualize about the method is that flapper is controlled by the hinge, which is controlled by the lever etc.. How is the lever able to work properly? Seems the piece of sheet metal would have to sit tightly around the hinge. Any play and it won't operate. I'm probably missing something....

If it matters, the rubber around my hinge is wasted. I can spin the lever and it doesn't lock, which brings me to my next question. If it's handy, which direction should the pin side of the lever face, and the position of the flapper, when you lock it down? I think I know, but confirmation would be great.

Here's your thread. Thanks Pappa: http://67-72chevytrucks.com/vboard/s...d.php?t=338890

When you bend the strap around a 3/8" bolt,it is smaller than the plastic covering the shaft of the diverter.If it's gone from yours,you may want to tack weld the strap to the shaft.
Once you put it on the flapper shaft the tension of the strap held by the screws makes it very tight!
The angle of the lever when in the a/c "on" position(switch closed) will have the flapper all the way closed.
I had to screw the cable clamp a few turns to fine tune mine so that the flapper worked full distance both ways with the control.
Mike.

**71CHEVYSHORTBED402** · 03-05-2016, 09:46 PM

I see. Didn't notice the plastic before, or what's left of it. I don't have a welder, but I may be able to come up with something. Thanks for the info.

100%Chevy · 03-06-2016, 12:44 AM

I did mine by copying what I got from here on the site.
The metal strap I used is a common rafter tie or what we call a hurricane strap.
Look here for the post--

http://67-72chevytrucks.com/vboard/s...d.php?t=338890

Scroll down and he shows it in great detail and very easy to do!

Mike.

/

03-03-2016, 11:56 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,134	Anyone restore A/C Duct Air ("diverter box") flappers? Nice work at a reasonable price and I know someone interested. Hopefully I'm not breaking any board rules here. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-04-2016, 04:10 AM	#2
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: Anyone restore A/C Duct Air ("diverter box") flappers? I consider that a throw away item once the flapper door breaks. Sucks because they aren't exactly cheap either. With it being made out of plastic, and the way the whole diverter box is constructed (and also being made out of plastic), there isn't much that can be done. Although I have seen some attempts at fixing the door with wood, sheet metal, and glue. I have only "restored" those that have a good flapper door Attached Images

03-04-2016, 08:01 AM	#3
Papa Smurf Junior Member Join Date: Feb 2009 Location: Ben Wheeler, TX Posts: 94	Re: Anyone restore A/C Duct Air ("diverter box") flappers? I just bumped up an old thread where I showed how to make a permanent repair to the flapper. saves a ton of money and keeps your truck original. Look under "air regulator question". __________________ 72 Sierra Grande 2500 BB 72 Sierra 2500, 42K miles, factory buckets 72 Cheyenne 20 72 Chevy SWB, Factory BB, Leaf Spring

03-04-2016, 06:30 PM	#6
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,134	Re: Anyone restore A/C Duct Air ("diverter box") flappers? Observation: I've seen a few NOS diverter boxes and they all have one thing in common, which is the pin on the lever is more narrow than the original from my truck. Really, the entire lever isn't built quite as well. Don't know if any of you guys have experienced problems, and would be interesting to hear, but I do know of one member whose pin broke when he tried to attach the cable wire. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 03-05-2016 at 01:45 AM.

03-04-2016, 06:46 PM	#7
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: Anyone restore A/C Duct Air ("diverter box") flappers? I've noticed the same thing.

03-05-2016, 09:46 PM	#10
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,134	Re: Anyone restore A/C Duct Air ("diverter box") flappers? I see. Didn't notice the plastic before, or what's left of it. I don't have a welder, but I may be able to come up with something. Thanks for the info. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-06-2016, 12:44 AM	#11
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: Anyone restore A/C Duct Air ("diverter box") flappers? I did mine by copying what I got from here on the site. The metal strap I used is a common rafter tie or what we call a hurricane strap. Look here for the post-- http://67-72chevytrucks.com/vboard/s...d.php?t=338890 Scroll down and he shows it in great detail and very easy to do! Mike./



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