Is thereca bleeding procedure fir the cooling system or is it self bleeding? Temp used to track rock solid on 210 - right in the middle all the time. Idle or driving. Changed the coolant with the same mixture - coolant, water and Red line water wetter. I've swapped out before and no issue. Now its running at 220-225 while drivig with good airflow and jumps to about 250 at idle. I have a 250 mile drive tomorrow and dont want any issues.