1970 Vacuum System Question
Thread Starter
Drifting
Joined: May 2002
Posts: 1,546
Likes: 282
From: Back in Nebraska
1970 Vacuum System Question
I am still in the process of rewiring and running new vacuum lines in my 1970 350. The car has A/C and according to the diagram: http://iotech.no/corvette/technical/..._heater_ac.gif there are 3 vacuum lines coming through the firewall. The small green goes to the Harness assembly, the small white line to the heater shut off valve, and the small black line to “source”. My question is, what source do I connect it to? This is the only line that I have yet to figure out. Please help!
:rolleyes:
:rolleyes:
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: 1970 Vacuum System Question (Apocolips)
That looks like a closed system other than the end of that black line so I would assume that has to hook to the 'T' check valve that comes off the intake. Not real familiar with your set up since you have a wipe door plus I do not have a/c.
Instructor
Joined: Dec 2003
Posts: 141
Likes: 0
Re: 1970 Vacuum System Question (Fevre)
On a '70 there should be 4 vac lines.One is for vac. to the blend doors. One goes to the wiper door control valve. One goes to the control valve for the head lamp doors. And one is vac. off the intake for the headlight & wiper switches.
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
Re: 1970 Vacuum System Question (Apocolips)
Here is another vacuum diagram that may be of some help.
http://www.stingray.nu/bilder/vacuum.pdf
http://www.stingray.nu/bilder/vacuum.pdf
