Quote Originally Posted by freds View Post
That is what I originally did. However, consider that he two pressure relief caps may/probably-do have different springs and will vent therefor at different pressures and open for "sucking-back" the coolant when cooling down at different negative pressure.........the two tank system can actually preferentially "pump" coolant into one of the tanks. {When the front cap vents first the front tank catches the coolant..........then if the rear cap opens on vacuum first it sucks in coolant from the rear tank}

That is what happened with my setup....rear tank gradually emptied and front tank gradually filled. It could work the opposite way too.

I removed my front tank

fred
That's a very good point. I hadn't thought of it. I will probably delete my front tank then.

Thanks, Fred.

-Buzz