VS HVAC Vacuum Lines

[exec24Participant 2004 VY S2 Berlina 1996 VS 5L Sedan View build HERE Member since: April 8, 2015 Posts: 435]

does anyone know what the 2 Vacuum line’s coming out the firewall on my VS, near the Heater hoses need to go to? and what direction they run? and also how the Vacuum tank is plumbed in?

i know there Vacuum for the heater vents and heather tap, but the last time i had them on my old engine they never worked correctly, so must of been setup wrong

• This topic was modified 8 years, 9 months ago by  exec24.

[HDN05LParticipant Canberra ACTVS Olympic Edt 383 stroker Ute View build HERE Member since: March 2, 2015 Posts: 289]

From memory and i could be wrong but one line is for the vents and ac controls that runs into the tree on the back of the manifold. It sits under the brake booster vacuum hose.

The other line should join the one way valve that runs to the inlet manifold looks black and white.

[VS 355 UTEParticipant QLD96 vs v8 ute View build HERE Member since: January 13, 2016 Posts: 141]

As far as i know there is only one vacuum line that enters next to the heater hoses into the cabin.This activates the heater controls etc.Vacuum tank is connected to inlet manifold, cabin line goes from the vacuum ball up behind dizzy where it has a T piece .One line goes to heater tap and the other enters the cabin.This allows the cabin controls for heater to be activated after engine is turned off.

Be careful to check the vacuum on/off valve is adjusted/working correctly.If it’s not ,the heater tap won’t activate. If not set up right it won’t compress the plunger far enough to let the vacuum through.It’s located in the driver’s side foot well area.A black plastic torpedo shaped thing  that is switched on and off by a white plastic arm off the heater controls.Mine was 3/4 in but still wash’t working.Needs to compress all the way.Finally check that your heater tap is not corroded and stuck open like mine was, and i always used coolant.These cars are getting old after all.

Anyway hope this helps.

[exec24Participant 2004 VY S2 Berlina 1996 VS 5L Sedan View build HERE Member since: April 8, 2015 Posts: 435]

had a look a a heap of vs’s today at the wreckers, most VS’s and VR’s has 2, i recon some were just missing them, i’ll draw up a diagram in a minute for future reference

and my VS has climate control and a brand new heater tap (whole car is practically new now)

[VS 355 UTEParticipant QLD96 vs v8 ute View build HERE Member since: January 13, 2016 Posts: 141]

No worries mate,just some experience with my car.

Was difficult to see around that area with the heater pipes,lots of wires ,catch can lines etc ,could only see one vacuum line.

Cheers.

 

[exec24Participant 2004 VY S2 Berlina 1996 VS 5L Sedan View build HERE Member since: April 8, 2015 Posts: 435]

all good mate, hopefully when i put it in last time i just put something in wrong, don’t really want to pull the dash out again

this is how i found most of them to be plumbed up

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