78 - Heater valve vacuum ?
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
78 - Heater valve vacuum ?
Putting the finishing touches on the motor this weekend. Have a vacuum question that the assembly manual doesn't make clear. On the passenger side of the firewall there is a grommet with 3 vacuum lines. Looking at this grommet from the front of the car there is a tan vacuum line on the left (10 o'clock), a black line in the center and a black line on the right (2 o'clock). I know the center goes to the passenger vent. The manual does not show a "tan line" on the left (they are all black)?? Does the left (tan) go to the heater control valve or does it go to the vacuum source?
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
That's what I thought..cause it had the right fitting on it to plug into the heater valve..BUT, the assembly manual shows ther other hose coming out of the grommet....leading to the valve.
Racer
Joined: Sep 2005
Posts: 453
Likes: 1
From: Austin TX
I only have one line coming from that area, and it's a yellow one going to the water valve. I don't even see the other nipples. Maybe that's why the heater/air only blows on the floor? I think I'm going to have all kinds of fun when I put in the new engine. 
