Hi Folks,
I want to put a ball valve in the heater hose, for improved a/c???, next summer.
The inlet to the heater core or pressure side is the valve?
Thanks
GW

 

I don't think it matters too much which hose you use as long as you stop coolant flow to the exchanger, just grab the one more convenient for controlling the shut-off, ...

 

This is where the water valve is located from the factory on my 1991 D-350, it is on the left.



This will make your air a lot cooler inside the cab, now you will not be having to cool down 140* incoming air with your evaporator.

From my post,

https://www.dieseltruckresource.com/...d.php?t=209772

Jim

 

Thanks Guys,
That is what I thought.
Mr. Lane, my 92 is set up the same as your's.
WEll it will be tomorrow, anyway.
GW