I turned my car off tonight and looked like i had coolant boiling back thru the fill cap or the overfill. I couldn't tell which it was dark. just put the radiator back in i didnt know if i might have overfilled it ???
Welli think you'll helped me fixed the problem. I rebleeded the system and filled the reservoir up ( itwas empty almost) and it does fine now. Im guessing the reservoir was low and sucking air in the system. Thanks LS1tech members
well i replaced my radiator cap and the problem persisted, a month later (today) it dawned on me to replace the rez. cap. ill get back to you if it works. as for other people, might also be the radiator hoses (upper or lower) which i also replaced along with the thermastat. all this before i thought to just replace the rez. cap =( wasted money tsk tsk.