Ok here goes. Car overheating problem. Owned car for two years, my buddy owned it for 4 years before that. No issues, but neither changed radiator fluid. So went ahead, did flush, replaced thermostat. Still overheating. Watched during flush/fill for engine to heat up and watched water flowing correctly in radiator. Car runs fine for first 8 to 10 minutes, with water temp in mid-range as always. Then it takes off and overheats. Only way to stop car from boiling over is to turn on heater to full blast. Air is super, super hot. Funny thing is, after it heats up, if I return car to slower speeds (under 50) with heater on, car does not over heat.
So question is, does this still suggest bad or poorly working water pump? Is it possible for this to be a pin-hole leak in head gasket? Crack in block? Fluid is still green and no apparent oil in fluid, no water in oil as that was recently changed as well. This one is really baffling me! HELP?
Thursday, July 7th, 2011 AT 6:22 PM