had the same problem with a sibring,took to the garage,they replaced the thermostat and gasket and found a hairline crack in the thermostat housing they replaced the housing and everything was fine then
Try replacing the thermostat.
fan clutch?
check your radiator. is it clean or does it need to be replaced? a simple cleaning cured my problem.
check your fan clutch if its weak it will overheat
either you are not using correct thermostats,or putting them in upside down,or thermostat is NOT the problem
it could be the water pump or a blown head gasket
did you check the radiator or the head gasket?
Be care-full my radiator blew up and burnt me. I replaced Radiator, thermostat, and water pump. Timing belt is in the way so I replaced it too. OK Now
did you check to make sure the electric fan(s) are properly coming on? They are famous for the relay losing contact. hope this helps......................Mike
Try taking the thermostat out completely, then see if it still overheats. If so, your only other problem has to be a bubble in the system and it needs to be burped. Took me about an hour to get a stubborn air bubble out!
theyre maybe an air bubble in the block causing it to overheat,or it could also be a bad water pump
My guess is the head gasket, have same problem. Nightmare