Vacuum routing

[Dando]

I am working through some issues. I feel like this current routing is wrong. Where does the check valve belong? How should I hook up the heater lines?

 

 

 

[cruiser54]

See if this sheds some light on it.

 

[Dando]

Thanks that should help me, I'm just going to redo it from scratch.

[cruiser54]

Sometimes folks marry the vac harness for HVAC to the dump valve for the front end disconnect.

 

Why not take the opportunity to relocate your ball? 

[Dando]

I don't have a front end disconnect, this was a 2wd but I used a non disconnect axle for the swap. A have moved the ball already to near the blower motor and it will definitely be staying there instead of going back under the bumper.

[cruiser54]

Sounds like a plan. 

[ParadiseMJ]

The vacuum source line from the intake manifold should go to the to the cruise servo (if equipped) and to the large orifice in the ball, the small black line goes OUT to the HVAC (black line on the firewall).  The pink line coming out of the firewall goes to the heater control valve.  If you don't have a heater control valve, the pink line should be capped...use a tight fitting cap.  If you don't have the vacuum line group for the front axle you don't need any other lines. 

 

The way that is set up doesn't seem like it would work, especially since it doesn't seem to be using the ball at all (do you have a round ball or a football?)  to "store" vacuum while under load...aka accelerating. If the HVAC is only blowing out the defrost, under load, it's likely because that set-up.