FOT
Anyone out there every gauged coolant pressure on the TR block? I'd love to
see the results.
I am going through the process of adding a surge (expansion) tank on my TR3
and I am starting to wonder if I am plumbing the return line in the correct
spot. I have installed the tank in the battery box with a line entering the
top of the tank that originates at the heater port in the rear of the head.
For the return line, off the bottom of the expansion tank, I have added a
welded fitting in my top radiator hose between the thermostat housing and
the radiator to accept the return line. I use a cross flow Chevy style
radiator so I have a metal radiator pipe between the thermostat housing and
the intake for the radiator. I thought it would be better to introduce the
hot coolant from the expansion tank back into the radiator vs dumping
directly back into suction side of the water pump via the return heater
port. My thinking was that I should not introduce hot coolant into the
suction side of the pump and re circulate it back thru the block. The way I
have it plumbed (if it works), the hot coolant from the expansion tank will
first go thru the radiator then into the pump and back thru the block. I am
guessing that downstream of the thermostat housing (I use a thermostat) the
pressure will be lower than at the back of the block.
My questions are:
Has anyone measured pressure between the thermostat housing and the
radiator?
Has anyone measured pressure at the back of the head heater port?
What is the difference?
Am I going to get coolant to flow from my expansion tank back into the top
radiator hose or is the pressure higher in that top hose than the back of
the block?
Would it be better to plumb the return line into the return heater port?
Thanks,
Greg
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