i am having an overheating problem with this car can u help on 2005 Pontiac GTO

i have replaced the thermostat and it worked fine for a month or so than it overheated again replaced thermostat again cooling fan came on it was fine and 2 days later its overheating again the cooling fan comes on any ideas

by in Churchton, MD on December 22, 2011
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1 answer 4 comments
ANSWER by , December 22, 2011
How do you know it's overheating? How many times do you think it overheated?
COMMENT by , December 22, 2011
the temp gauge goes to the red after i put the first one in it was fine untill the other day so put another one in and it was fine for a day and then it started again if i pull over and let it sit for a few minutes its fine for awhile and then heats up again are they having water pump issues and do they have the plastic impellers on the pumps
COMMENT by , December 22, 2011
My next question would be is have you ever done a proper cooling system service? If you redlined the engine more than once I would have the cooling system checked for hydrocarbons. Are the cooling fans coming on?
COMMENT by , December 22, 2011
have not checked for hydrocarbons yet but the cooling fans do come on at the proper time have they had any problems with the water pump finns or the intakes on these
COMMENT by , April 05, 2014
I had the same problem with my 2005 GTO. The issue was a leaking head gasket. I suggest taking it to a trusted mechanic to have it diagnosed before you end up needing a new radiator as well. If it keeps overheating and you have issues with coolant coming out of the radiator cap, you will end up cracking your radiator as well. Speaking from experience. Hope this helped.