Low air volume from your AC?
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
Low air volume from your AC?
This is on the 77 I have for sale.
Well I wasn't happy with the air flow from the AC. I went and got a new blower and motor for a 86 vette and made up a 3/4" spacer. When I pulled out the old motor, I found part of the reason for low air flow. It had the wrong blower wheel on it. It was about 1/4" shorter than stock. The one on the left is what came out of it, the one on the right is what should have been there.
The one on the right in this pic is the new one with the homemade wood spacer.
Before I installed it, I stuck my hand in the hole and found it nearly full of leaves. I stuck the vacuum hose in there and sucked it out then stuck the camera in and took a pic. Still lots of leaves.
Put an air blower in the back side of the evaporator through the resister hole and blew through it then vacuumed it some more. Nice and clean now.
I put in the new blower with the spacer as well as a heavier ground wire. This thing moves air like it should now. Worth the time invested and the price of the new blower.
Well I wasn't happy with the air flow from the AC. I went and got a new blower and motor for a 86 vette and made up a 3/4" spacer. When I pulled out the old motor, I found part of the reason for low air flow. It had the wrong blower wheel on it. It was about 1/4" shorter than stock. The one on the left is what came out of it, the one on the right is what should have been there.
The one on the right in this pic is the new one with the homemade wood spacer.
Before I installed it, I stuck my hand in the hole and found it nearly full of leaves. I stuck the vacuum hose in there and sucked it out then stuck the camera in and took a pic. Still lots of leaves.
Put an air blower in the back side of the evaporator through the resister hole and blew through it then vacuumed it some more. Nice and clean now.
I put in the new blower with the spacer as well as a heavier ground wire. This thing moves air like it should now. Worth the time invested and the price of the new blower.
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
I had to remove the coolant recovery tank and then the five 1/4" hex head screws. Putting the new one in was a little harder, I put the motor and spacer into the inner fender area then put the blower wheel on it and then put the whole assembly in with longer screws.
Instructor
Joined: Feb 2011
Posts: 241
Likes: 1
From: Axton va
i think they get sucked in from the freash air vent in the cowl,the hole should have a screen over it but sometimes they break,mine sit for a while and the heat/AC box was full of nuts and squirrel nest
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Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
On later C3 Vettes there are screens in the cowl area to prevent accumulation of debris in the HVAC system.....starting around 1973 model year as I recall. Putting some screen in the upper cowl area is never a bad move on a restoration.
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois