Other Category problem
1988 Saab 9000 Engine Size unknown Front Wheel Drive Manual 255000 miles
my car is running hotter than normal, started by running hot while idling or in stop and go traffic in town, now runs hot, but not in the orange zone, even on highway. The fluids are fine, there is no coolant leak that I can tell. I think it may be the thermostat or the switch that tells the fan to turn on, but I don't know for sure. The fan turns on when I turn the car off, like it should, and I don't know if the fan turns on when I am driving. There has been a weird noise no mechanic can figure out when the car is heated up and been running for a while. This is almost a humming noise, gets louder at idling in stop and go traffic especially after coming off the highway. It all started by just running hotter in stop and go, now runs hot even on highway. Runs a little cooler when I turn on the heat to HIGH in car, pulling some of the engine heat into the car, and the temp gauge goes up some while going up hills. Any advice on what the weird noise is, or why the temp is running hot? I had the oil changed, last time that seemed to help with the temp, but not this time. The belts and hoses are fine, too. The heat inside the car definitly still works just fine.
Saturday, December 29th, 2007 AT 11:41 AM