Temp fluctuates w/ new radiator, already burped
My radiator was leaking so I replaced it with a used one from a TJ, now my temp fluctuates from 210-225 over and over when the Jeep is running. It will slowly climb to 225 then abruptly drop to 210. I ran it with the radiator cap off to burp it and get air out of the system, and each time it reached 225 the coolant level would rise then a bubble would come out then the coolant level would drop again. I thought that this was working to get the air out, but after an hour of running it this way it was still doing it. How much air could be in there? How long does it normally take to compleatly burp it? Or is there something else wrong? Prior to the radiator swap the temp was steady at 215 or so, other than the leak there was nothing wrong with it.