astro vent
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
The rear vents are either operational or non-operational...depending on what options you have on your car. If your car has 'active' rear vents, they are activated by a vacuum servo at the demand of the heater control system.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Lilypad,
The non air cars had functional vents on them. They were controlled by a vacuum pod mounted near the doors. The AC cars did not have functional doors.
If you have a cable in the shift console, it operates the vent door down by the kick panel of the car and not the vacuum operated doors.
If you look at your floor board next to the shifter console you will see a vacuum pipe. This pipe ran from the shift console all the back to the vacuum pod. (#2 in the picture below).
Willcox Inc.
The non air cars had functional vents on them. They were controlled by a vacuum pod mounted near the doors. The AC cars did not have functional doors.
If you have a cable in the shift console, it operates the vent door down by the kick panel of the car and not the vacuum operated doors.
If you look at your floor board next to the shifter console you will see a vacuum pipe. This pipe ran from the shift console all the back to the vacuum pod. (#2 in the picture below).
Willcox Inc.
Safety Car
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
Yes I had the heater control apart a month ago.. it is a vacumm line from the heatrer control that takes engine vacumm and depending on the heater setting ( i think Floor? does anybody know?) it routes vacumm to the rear diaphram and open up the rear vent...
Safety Car
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
nevermind I found it in the chassis service manual.. anytime the temperature setting at the heater control is cold, then the rear vent is open... the rear valves should close whenver you turn the temperature up.....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
