Possibley losing coolant pressure?
I went and rented the coolant pressure tester today and here are the results.
Put to 15 PSI, it slowly dropped over a period of 2 minutes to under 14, and when left for about 3-4 more minutes continued down to 13 and didn't look like it was done falling yet.
Released pressure, tightened the tester back on, and started the engine. Over a period of 12-13 minutes it raised to about 8 PSI. Once it got up to 6 PSI, it seemed like it was gaining 1 PSI, then dropping it, then gaining it and a little more, then dropping 1PSI. The gains were slow, and the drops were over a period of like 5-10 seconds. I quit after 13 minutes,it may have gone higher if I had waited.
COTY - 2012
Tom - 03' Bonneville SSEi', 00' Sierra SLE, 1980 Goldwing GL1100 Interstate