Engine Cooling problem
2002 Chevy Impala 6 cyl Two Wheel Drive Automatic 93000 miles
I bought this car in January of 2009 and since then it has been overheating constantly. Thankfully I don't need to drive it everyday, but I have put a hefty sum of cash into the vehicle and was hoping someone could give me the best prognosis for my problem.
First note - In the winter the car barely overheats, I assume due to the weather outside.
When does it overheat -
After 40 minutes of driving 65 mph +
Stop and go traffic
What I have fixed/done -
New thermostat/Radiator fan/Multiple Heater core and Radiator line flushes/had Head gasket checked, came back negative
Other symptoms -
The heat in the car will stop working and I will get a heater core flush hopefully to allieviate backed up hot air, not sure if this can cause overheating
After flushing out the radiator it appears to help, but uncertain, most machanics say that there is build up and sludge, one said it was rust piling up in the lines (is there something I can buy to get rid of the rust?)
The coolant can be murky, but does not smell like oil
Whats next -
I just don't know what it could be anymore, flushes seem to work, but that could be the introduction of new coolant into the system and very temporary. Could it be the intake manifold, which I read is bad on this model car, how would I check that?
Any other suggestions?
Thursday, May 27th, 2010 AT 4:38 PM