The Stovebolt Site Forums The Shop Area Interiors Fresh Air Heater Question: Water Flow Direction

I was following another fresh air heater thread, when I had a question about the direction of water flow through the system. I've posted below an image from the repair manual that I have drawn some read arrows onto. Is this the direction of water flow? I only ask because I'm using a non-stock engine.

Thanks in advance for the help.

David

I don't think it really matters too much which direction the water flows, except in the case of a temperature control valve, which should be first.
But if you didn't have a temperature control valve, then the main concern would be routing to purge air out of the system. That diagram shows the connections at the bottom of the heater coil, which would tend to trap air in the top of the coil, but maybe there's enough flow that air trapping isn't a problem.

The red arrows correctly show the direction of water flow.

Thanks Gord! I had a feeling it was correct.

Kevin,

You bring up an interesting point. I played with the idea of rotating the original heater core to put both inlet and outlet at the top, but the passenger side hood hinge told me no way...