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Coolant Pressure/Flow

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I recently installed a coolant filter, and based on what I thought, and was told, at the time I plumbed it the way I did. I have the "pressure" coming from the head, and the "return" going to the block. I also recently realized that the flow of coolant is from the block, thru the head, and back to the pump, or radiator... So I am wondering if my filter is filtering backwords?

So can anyone help confirm or deny this? Is the pressure in the head or the block greater?


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