Mystery overheating

[Tim7139]

Be advised, let it run a longer than you might think without the cap to really burp it completely.
Recently I lost a stud on my surge tank flange and had to take the level down to pull it off and replace the stud/gasket. This was far less than you've experienced with the lower hose and it took a hell of a lot longer than I would have guessed to burp and get all the bubbles to stop.

[BAsque1]

Originally Posted by Tim7139

Be advised, let it run a longer than you might think without the cap to really burp it completely.
Recently I lost a stud on my surge tank flange and had to take the level down to pull it off and replace the stud/gasket. This was far less than you've experienced with the lower hose and it took a hell of a lot longer than I would have guessed to burp and get all the bubbles to stop.

Tim:
funny you mentioned this, I took the cap off this afternoon, I am letting it open all night, I also checked the overflow tank and it is virtually empty that says that most all coolant went back into the system after cooling off.
Tomorrow I will top it off with more coolant let run for about 5 min uncapped and see what happens. I will measure the temp with y laser IR thermometer and compare that to the gauge.
this is so frustrating, for a car that it was spot on with the temps.
Lou