Engine Cooling problem
1999 Chevy Malibu 6 cyl Front Wheel Drive Automatic
I have a 11/99 Malibu. It started to overheat while driving on the highway. I replaced the thermostat and water pump. Tried to flush out the system as best as possible. Blew out the radiator fins. Confirmed that the cooling fans came on at around 220-230 degrees and that they were spinning at a good clip. Replaced the radiator cap and topped off the coolant. Checked for coolant in the crank case and looked for white smoke from the exhaust. I drove the car for 1 hour on back roads at about 40 MPH. No signs of overheating. The next morning the car was driven 5 miles to the highway. Once at highway speed (55 MPH) it overheated again. The coolant is blowing out of the res. Overflow tube. Any chance there is some bleeding issue or maby the radiator is partially plugged and can't cool the water while the engine is spinning at faster RPM's while on the highway?
Wednesday, June 3rd, 2009 AT 7:53 PM