Quick Heater Vacuum question

[someguy360]

Hi Guys.

Trying to solve some issues with my heater only blowing to the footwells.

I am tracing the vacuum lines in the engine bay and am following the T Piece.

Where it splits off and heads down the passenger side of the car it disappears into the guard, where does it go from there as I can't seem to find the other end?

And where is it meant to go on the drivers side of the car?

Also I have disconnected the heater tap and bridged the hoses in the engine bay due to a leaking heater core which I won't be able to replace until summer, do the 2 main hoses from the firewall impact on which vents work inside or is it just the little vacuum lines.....as I would still like to be able to use the A/C from all vents until the heat gets fixed

Thanks

 

[jpetrou]

Hi, the line that runs into the left hand guard goes into a box just behind the front left side of the bumper bar. this box is a vacuum reservoir where it keeps the a reserve of air for the heater/air conditioner mode control. this allows the mode to switch from floor to demist, face level etc, while the engine is under load. If the hose has come off this box or the box is cracked/broken, your mode switch will not operate.

 

[someguy360]

Hi, the line that runs into the left hand guard goes into a box just behind the front left side of the bumper bar. this box is a vacuum reservoir where it keeps the a reserve of air for the heater/air conditioner mode control. this allows the mode to switch from floor to demist, face level etc, while the engine is under load. If the hose has come off this box or the box is cracked/broken, your mode switch will not operate.

Thanks mate, is this part of the windscreen wiper fluid box/tank down there (labelled VDO)? as I can't see anything else down there.

Does anyone have a pic of this box?

 

[Brett_jjj]

The vacuum reserve tank under the passenger side front guard is a round plastic tank, kinda looks like a black plastic ball. It sits near the washer bottle under there. .The vacuum line connects to the vac reserve tank via a small push on connector on one side of the tank, and it can sometimes fall off.

 

[someguy360]

The vacuum reserve tank under the passenger side front guard is a round plastic tank, kinda looks like a black plastic ball. It sits near the washer bottle under there. .The vacuum line connects to the vac reserve tank via a small push on connector on one side of the tank, and it can sometimes fall off.

Thanks Brett

Will check when I get home, would be nice after a 1.5 year build to finally get the heating/cooling situation sorted hehe

 

[jpetrou]

Unfortunately, I dont have a picture for it, as my brother owns a VS and I dont have access to it at this time. From what I can recall, the reservoir box is a black box under the left front guard behind the front bumper, it is square shaped on his approx 10cm x 10cm in size. I dont remember if there were any markings or if VDO was stamped on it. I know on the earlier VL-VP series, the reservoir was a ball shape located in the same area as the VS.

In regards to the vacuum line, it runs out the back of the engine to a T piece, one side of the line runs through the firewall and connects to the back of the mode switch on the dash, the other line runs to the vaccum reservoir box previously mentioned.

 

[Brett_jjj]

Unfortunately, I dont have a picture for it, as my brother owns a VS and I dont have access to it at this time. From what I can recall, the reservoir box is a black box under the left front guard behind the front bumper, it is square shaped on his approx 10cm x 10cm in size. I dont remember if there were any markings or if VDO was stamped on it. I know on the earlier VL-VP series, the reservoir was a ball shape located in the same area as the VS.

In regards to the vacuum line, it runs out the back of the engine to a T piece, one side of the line runs through the firewall and connects to the back of the mode switch on the dash, the other line runs to the vaccum reservoir box previously mentioned.

The VS uses the same vacuum reserve tank as the VN, VP VR etc.

 

[KAL SPL]

Climate control or regular ?

If its climate the vac ball may not be your issue.

 

[aussie4life]

Check to see if the little one way valve is in line between the tb and the t piece. If this fails or is in backwards then it wont hold vacuum/allow the vac process to de-pressurise the limes/reseviour

 

[NeilB]

I would think that you need to replace your vac controller that is below the radio area, if you have climate it is about 10cm long and has 5 vac lines connected to it, if you have the normal control it is round and has different colour lines going to it. This is what controls what air goes where.