Quote:
Originally Posted by Stocker
My '72 K20 (350/TH350) has factory A/C and is plumbed differently than yours. The valve is on the 5/8" hose from the intake manifold to the lower port on the heater core. The upper heater core port has a 3/4" hose going to the radiator.
The odd thing is that with different size hoses, the valve will only fit on the 5/8" hose, yet yours is on the hose from the radiator.... which on my truck is 3/4".
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Sorry I was wrong I do have mine plumbed like yours.
From top of core to top of radiator... From bottom of core 3/4 to valve out of valve to 5/8 connecting to intake. What is the direction of water circulation???
The problem I am having is the vacuum logic is not matching what the heater control is set at. I get hot water through my core when I should not have flow. Could my vacuum VALVE ON THE CONTRILLER IN MY TRUCK BE PLUMBED BACWARDS?? Sorry for the caps hit the wrong key...