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Topic: Fresh air vent vacuum testing

in Forum: C3 Cooling and Heating Systems

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Fresh air vent vacuum testing (1/4)
3/17/14 7:16pm

Richie
Former Member
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Joined: 2/1/2014
Posts: 1

All vacuum actuators are functioning except the fresh air vent on the right kick panel and the fresh air vent flap inside the right fender area.
Both are operating on the same vacuum line. Could the line be plugged? What is the way to test that vacuum line? The doors don't move and i don't feel suction on the line when i move control to "vent".
All the components are new. 1982 Corvette.
It would be helpful to know how this system is supposed to function,Thanks

Question: Why are Air vents not working

Click one of the following choices to submit your response. (NOTE: Be sure to select the correct response, once you make your selection you can not change it!)

1. How does the fresh air vent operate?
2. How do you test the vacuum lines?

See the current results of this survey

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Re: Fresh air vent vacuum testing (2/4)
3/17/14 10:57pm

Adams' Apple

Lifetime Member
Moderator
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

An even better question is...Why is this a Poll? LOL

I have the '82 Service Manual...I'll look and see what goes where, and get some diagnostic info for you. Might be a day or so, unless someone else has it handy. Thumbs Up

|UPDATED|3/17/2014 7:57:22 PM (AZT)|/UPDATED|

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Joel Adams
C3VR Lifetime Member #56
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(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Re: Fresh air vent vacuum testing (3/4)
3/18/14 6:34pm

tb2k82ce

Lifetime Member
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Lemon Grove, CA - USA

Vette(s):
1982 C3 Collectors Edition 44000 miles, sat in the sun most of its life, My wife purchased it for me for Father's Day in 2007 from her girlfriend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.

Joined: 10/17/2007
Posts: 2041

I had some issues with this system. I drew out a diagram of the system and how it is suppose to work. Found I had a bad bypass valve the good news is I finally found one the bad news is I may have purchased the last new one in the world. There seems to be a work-around you can see my note on the drawing. Personally I like my drawing more than the ones I could find in other places.

/member_uploads/10901_11000/10990/82-Heater-AC-control-system-2.jpg

|UPDATED|3/18/2014 3:34:48 PM (AZT)|/UPDATED|

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Re: Fresh air vent vacuum testing (4/4)
3/18/14 10:12pm

Adams' Apple

Thanx Gilbert! Thumbs Up

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