Just now thinking of it.....I may just have a slight air leak somewhere. Either that or more proof that my pump is cavitating. I seem to recall that my coolant is actaully a bit "merky" of sorts with a white haze. Thought it was just from filling the system and the WW reacting but it has yet to truely go away.
I will try pinching BOTH the inlet and the outlet tonight and see if I can hear any differences (of course not both at the same time

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Also I have taken that pump apart several times looking for anything that might be causing it to be so noisy. Impeller looks great (no wear at all), shaft is clean, gromits are nice and fit wonderfully (can hardly get the shaft out of them sometimes), and the blades are solid on the impeller (AKA no slack between blades and magnet).
I think that potentialy the largest size tubing that I can go up to is 5/8" MAYBE 3/4" for the inlet of the pump and I can get rid of the elbow between the res. and pump. I just figured that gravity was going to be doing most of the work getting the water to the pump so it really didnt matter. Guess I got a stronger pump than I thought
Ok thanks for all the ideas. Hopefully soon I can have this thing working correctly and not keeping me up at night :shrug: :shrug: