Engine Cooling problem
2006 Chevy Impala 6 cyl Front Wheel Drive Automatic 73000 miles
2006 Impala with 73K miles. Has started leaking cooling, the wife says it gets hot, even to the point of over temp. We let it cool off and add water/coolant and the problem goes away. Happened 3 times already, I would say the last time before today was ~2-3 months ago. Last time I rented a pressure tester and the system pressure tested good so I'm at a loss. Today the car had cooled down for about an hour before I got a chance to look at it, it was very low on coolant. I added almost a full gallon, brought engine to operating temp with cap removed and the car just puked a bunch of hot (steaming) water out of the filler neck. This was not a small overflow but a major loss of water/coolant. Not sure where to turn at this point, my mechanic is booked up until at least Monday. I'm not seeing any water on the dipstick nor coming out of the exhaust, so I don't think it's a head gasket. Leaning towards thermostat and then water pump in that order, but need someone with more expertise to help me narrow this down post haste.
Wednesday, December 30th, 2009 AT 7:16 PM