Quote:
Originally Posted by keelcooler
I recently installed a temp/water pressure gauge combo from MMI on my 50 year old Pearson. Reads around 6 psi at 1600 rpm.
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Aha - this is actually the first direct pressure read I've found for the A4, and at the top end of the ballpark for what I had estimated to be the coolant pressure. The heat exchanger cap is rated to 7 psi, so I presumed it was 2-5ish. Is this raw water, or enclosed antifreeze cooling?