Cars been running great. I initially had a problem with overheating when i put the rebuilt engine in. it needed a good air bleeding then the problem seemed to go away. I have my turbo hooked into the cooling system parallelled to the heater core and car normally has been running at normal temps.

today i turned on the ac (it was hot out about 100degrees) and next thing i know the car was overheating. ac ran ok before without overheating. the needle was bouncing around a bit at the end of the guage not quite into the red so i turned the ac off and turned on the heater and it slowly bounced back down to normal temps. rest of the day seemed ok, there is no coolant leak and the bleed nipple let no air out and the radiator still is filled to the top. all lines seem hot with coolant. can i still have air in the lines? is there a good technique to check and get it out of there?

thanks!
torin

any ideas?

 

Mine does the exact same thing...i was thinking my headgasket might be blown.