Heater valve flow direction

[Driv3r]

Guys I've decided to downgrade to an earlier valve to reduce future chance of valve related complications.

Could any of you advise the correct direction of the valve?

Cheers

[Driv3r]

Any of you heater expert guys know this?

[M3M3]

as far as i know...that flap has nothing to do with the heater valve.   heater valve only controls coolant flow and is manipulated by the temp slider.

 

the flaps are controlled by the other levers....

[Driv3r]

Thanks, I believe I was unclear. The showed flap and the heater valve are both controlled by a single lever. I need to know when this flap is closed ( the lever being to the left or right), is the valve also closed or open. This will clarify which way I'm going to bolt the valve to the holding bracket.

[02Les]

There is an arrow on the valve, and it points (on mine) to the heater box.

As both cables are attached to the same lever and length not adjustable, I don't think there's a choice of making the valve open or close differently to the flap.

 

Edited February 8, 2017 by 02Les

[Driv3r]

Thanks Les.

[halboyles]

The heater box flap you are showing is the fresh air flap.  It and the heater valve are controlled by the same slider using two separate cables.  When the flap is open the heater valve is closed and vice versa.

[Driv3r]

Got it, cheers

[Simeon]

2 hours ago, halboyles said:

The heater box flap you are showing is the fresh air flap.  It and the heater valve are controlled by the same slider using two separate cables.  When the flap is open the heater valve is closed and vice versa.

 

Is that right? I always thought that if the lever was in the extreme right position that would be fresh air shut off and heater valve closed. 

 

Of of course my heater box is so ropey, I can't tell the difference when operating the various flaps so only going on 'feelpinions' as to how it should work. 

[halboyles]

9 hours ago, Simeon said:

Is that right?

 

If you think about it (which you made me do!) that flap controls the mixture of fresh air and recirculated cabin air.  That one slider lets you mix the air and control the flow of heated coolant at the same time.  So if you want max heat, you shut off outside air and open up the coolant valve all the way.  And the opposite for most outside air and no heat (kinda).  Now can I have my second cup of coffee?

[Driv3r]

 
If you think about it (which you made me do!) that flap controls the mixture of fresh air and recirculated cabin air.  That one slider lets you mix the air and control the flow of heated coolant at the same time.  So if you want max heat, you shut off outside air and open up the coolant valve all the way.  And the opposite for most outside air and no heat (kinda).  Now can I have my second cup of coffee?

Sorry to bump this up again. I've finished the heater box restoration but have a minor question to make sure I don't have to see a sight of any heater box ever again!

So the heater in recent cars let you control the fresh air either by a switch or flap regardless of fan or water valve being open or closed.

How do we stop outside air (fresh air) to enter the cabin in summer, specially when we don't want hot water to pass through the valve?

Let's say we're driving in a tunnel filled with carbon monoxide or a construction zone with dust everywhere and its summer!

The polluted air will get in even if you close both cabin vent flaps.

My guess is either we didn't have pollution or dirty air back in 70s or this was resolved when they introduced cabin filters.