Ok im going to try to keep it simple.
My coolant is BLACK.I did a compresson test and the high was 195 and the low was 169.I then drianed the oil to see what it looked like. It looked like normal oil.I took some of the coolant and put it in a glass to see if it would seperate and it didnt.It got lighter but it looks like dirt and crap on the bottom. When I bought the motor it had a bunch of rust in it so I stuck a garden hose in it to flush it out.Today I reflushed the whole motor and put new coolant and oil in it and the coolant is turning black again.Theres no bubbles in the coolant when the car is running and runs like a champ. Aynbody have any ideas because im stumped.Im almost 100% sure its not oil.By the way I did pull the radiator out today and flushed it real good.Any ideas?