When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
From: PHOENIX, AZ Yes, it's true. You are a good woman. Then again, you may be the Antichrist.
1969 - No AC, Heater control vacuum source PIC REQUEST
I'm trying to fix several things on my 69, and in the course of working on the wipers and wiper door, I came across an open vacuum line.
I believe it's the vacuum supply line for the heater control. I exits the firewall beneath the wiper door limit switch, and the tubing is small diameter, roughly 3/16" or 5/16".
The Willcox diagram below shows it, but not how it joins to the vacuum source. Does anybody have a pic of how this line is routed after it leaves the firewall and how it connects to the vacuum lines?
Hi R,
After the 1/8" vacuum supply hose for the heater/defroster controller comes through the firewall it joins the yellow striped vacuum hose running to vacuum relay that controls the wiper door.
There is a 't' in the yellow striped line with a 1/8" nipple for the heater/defroster line to connect to.
Look along the length of that line for that 't'.
This is the 't' on a 71 car. It's further to the right on the firewall because of a change in the wiper door relay's location.
Regards,
Alan
The 't' will likely be closer to the relay... not as shown here. Look for the yellow (vacuum supply) hose running to the wiper door relay.
Here you see the small hose, the large vacuum supply hose, the 't' and the tiny clamp.
From: PHOENIX, AZ Yes, it's true. You are a good woman. Then again, you may be the Antichrist.
Thanks Alan.
After some investigating, it looks like the "T" used to be about 3" from the relay. The yellow line is spliced in that location and is now connected with a short piece of metal tubing. The T probably broke at some point and BUBBA decided the heater controls didn't need vacuum anymore.
Hi Rick,
The tiny nipple was very easy to break off the tee.
A tee in that configuration... 2 large nipples opposite each other, and 1 tiny nipple at a right angle to the other 2...is difficult to find.
Perhaps someone knows of a source for them?
Regards,
Alan
From: PHOENIX, AZ Yes, it's true. You are a good woman. Then again, you may be the Antichrist.
Originally Posted by Alan 71
Hi Rick,
The tiny nipple was very easy to break off the tee. A tee in that configuration... 2 large nipples opposite each other, and 1 tiny nipple at a right angle to the other 2...is difficult to find.
Perhaps someone knows of a source for them?
Regards,
Alan
You are reading my mind. If anybody knows where to source them, let me know.
Hi Rick,
A tee with THIS configuration is available. (Close but not quite.)
It can work but the 2 large nipples should be opposite each other.
Regards,
Alan
The first one shown isn't the configuration for at least 68-72 cars.
Scroll down a few items to the $7 tee. People say they can make this one work.
You might find this one in your auto parts store. https://www.google.com/search?q=corv...10571295049112
Thanks guys. I found the one from Doc Rebuild and ordered that.
Bringing this topic back since I was unable to find this piece at a reasonable price. Finally decided to buy a variety pack that might also help with other needs. If anyone is interested this is the link:
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
1969 - No AC, Heater control vacuum source PIC REQUEST
