Mystery Duct
Thread Starter
Instructor
Joined: Jul 2012
Posts: 186
Likes: 6
From: Lebanon Junction KY
Mystery Duct
I'm putting the dash/instrument panel back in after 5 years and have a question about a duct.
My car is a 73/non air. The duct I am wondering about attaches to the top of the heater box and empties out under the wiper controls in the upper center. This is a small duct that is open at all times. I was just wondering what is the purpose of this? It looks like it would direct air downwards toward the gauges. The reason I am asking is I am thinking if it were closed off more air would be directed through the windshield defroster duct in the dash pad.
Thanks
Mark
My car is a 73/non air. The duct I am wondering about attaches to the top of the heater box and empties out under the wiper controls in the upper center. This is a small duct that is open at all times. I was just wondering what is the purpose of this? It looks like it would direct air downwards toward the gauges. The reason I am asking is I am thinking if it were closed off more air would be directed through the windshield defroster duct in the dash pad.
Thanks
Mark
Thread Starter
Instructor
Joined: Jul 2012
Posts: 186
Likes: 6
From: Lebanon Junction KY
My car is a non AC car. I realize what you are saying, however this duct is much smaller, and comes out just above where the AC duct would if I had AC. It is very small, maybe 3/8" x 2" . Also it is mounted in the flat above where the AC duct would be and blows vertically down.
Team Owner
Joined: Sep 2006
Posts: 31,278
Likes: 4,372
From: Westminster Maryland
Hi MAP,
Since that little duct is separate from the duct for the defroster, putting a piece of tape over the opening might direct more air to the defroster.
I don't think it would be much of a difference though because the duct is so small.
Regards,
Alan
Since that little duct is separate from the duct for the defroster, putting a piece of tape over the opening might direct more air to the defroster.
I don't think it would be much of a difference though because the duct is so small.
Regards,
Alan
Last edited by Alan 71; Mar 19, 2017 at 12:37 PM.
Le Mans Master
Joined: Jan 2001
Posts: 6,743
Likes: 1,385
here is an old thread discussing it...
https://www.corvetteforum.com/forums...k-is-this.html
looks like the same thing that was in mine before installed aftermarket a/c.
looks like the same thing that was in mine before installed aftermarket a/c.
Last edited by carriljc; Mar 19, 2017 at 04:52 PM.
Thread Starter
Instructor
Joined: Jul 2012
Posts: 186
Likes: 6
From: Lebanon Junction KY
https://www.corvetteforum.com/forums...k-is-this.html
looks like the same thing that was in mine before installed aftermarket a/c.
looks like the same thing that was in mine before installed aftermarket a/c.
