my wife has a buick rendezvous. i few weeks ago she called me and told me that her engine overheated. so we took it to a shop who looked at it and said it had a blow head gasket and also needed a lower intake gasket. wanting 900 bucks to fix it i decided to get a second opinion. the other guy that looked at the car said that he could not find any leaks anywhere and thought that the thermostat was sticking and i could use a coolant flush. so all new coolant and thermostat and i drove it a halfhour home and it was fine. the next morning my wife goes to work and she has the same overheating problem. i noticed that there were alot of gunk in the resouvoir and in the radiator cap. i flushed the radiator 3 times now. each time it seems fine for awhyle the heater is blowing hot and then it does the same overheating crap again and the heat gets cold. i think something is getting clogged in the heater core but dont know how to fix it. anybody got any ideas on what to do.??
Nov 8, 2009 at 5:33 PM