i own a 99 cavalier... i have had issues with the car overheating. the car used to run a little before half way on the temp. guage and now it seems like its running between halfway and three quarters or sometimes right befor the red..... i made sure that the fan is kicking on when it gets hot... in the last month and a half....i replaced a thermostat, water pump, coolant tank cap, head gasket, intake and outake manifold gasket, valve cover, head bolts, and also had the head machine shoped... i find myself putting in about a gallon of collant every one -two weeks.. the car usually doesnt overheat if i check the antifreeze before i use it... any ideas or sugestions would be greatly appreciated