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Topic: 1970 Astro Ball Vents No A/C Car

in Forum: C3 Interior


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1970 Astro Ball Vents No A/C Car (1/6)
 9/10/23 1:18pm
johnny650
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Dodge County, WI - USA

Vette(s):
1970 Stingray Base 350cu 300hp Corvette Bronze/Black.


Joined: 7/7/2023
Posts: 12

greetings...

it is my understanding astro ventilation is supposed to flow air from the wiper door thru the astro balls and out the back louvers... the back louvers operate... just caints getts anything from the ball vents...

i push the knobs in and getts zero air flow when motoring down the road...

i pull the knobs out and getts zero air flow when motoring down the road...

have tried with heat on... have tried with defrost on... have tried with fan on...

are the knobs supposed to be out to flow air... or are the knobs supposed to be in to flow air... 

johnny

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Re: 1970 Astro Ball Vents No A/C Car (2/6)
 9/10/23 3:25pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2289

Hi, The pull knobs are supposed to be out to flow air. If you look in the vents, you can see the door and how it operates with the knob. Very likely the duct is missing, or badly misaligned with the system to produce air. Also previous owners may have had a hand in the system.  It's 53 years old. A lot can happen in that span of time. 



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Re: 1970 Astro Ball Vents No A/C Car (3/6)
 9/20/23 3:39pm
spinalman
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Lancaster, PA - USA

Vette(s):
1970 Green Convertible


Joined: 8/24/2008
Posts: 21

Pull the knob out then look through the vent diffuser to see if the door inside moved. If the door doesn't open use a stick or screw driver to gently push on the door when pulling the knob. Do this several times to get it unstuck. The seal might have deteriorated gluing the door shut. Also, it may be just need lubrication on the hinge/cable.

Jan

Re: 1970 Astro Ball Vents No A/C Car (4/6)
 9/20/23 3:51pm
Steevo
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San Diego, CA - USA

Vette(s):
'73 L48 Coupe, 383, M20, A/C, Electric Windows. Matterhorn White Jet-Glo w/ Dark Blue interior. Rochester, Edelbrock, Blackjack Ceramics, Borlas w/ 2.5" mandrel X over, Cooper Cobras on both OEM Steel and Aluminum Wheels.


Joined: 11/10/2013
Posts: 47

My guess is a vent tube underneath the dash somewhere is missing Johnny, like Manchestershark suggested. 

Also, you should be feeling some resistance when operating the vent's knob. If not, the flapper valve could be stuck in the closed position and the knob's rod is detached from it.

Good luck.

Steve 



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Re: 1970 Astro Ball Vents No A/C Car (5/6)
 9/21/23 3:05pm
johnny650
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Dodge County, WI - USA

Vette(s):
1970 Stingray Base 350cu 300hp Corvette Bronze/Black.


Joined: 7/7/2023
Posts: 12

greetings...

both sides are working properly... can see the flapper open and close working the push pull knob...

felt zero air flow until it turned colder last week... could feel ambient temp air flowing...

johnny

Re: 1970 Astro Ball Vents No A/C Car (6/6)
 9/21/23 7:26pm
Steevo
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San Diego, CA - USA

Vette(s):
'73 L48 Coupe, 383, M20, A/C, Electric Windows. Matterhorn White Jet-Glo w/ Dark Blue interior. Rochester, Edelbrock, Blackjack Ceramics, Borlas w/ 2.5" mandrel X over, Cooper Cobras on both OEM Steel and Aluminum Wheels.


Joined: 11/10/2013
Posts: 47

 

Steve



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