Just fixed an idle problem on this car by replacing the coolant temp sensor, only to learn that the car boils over at the coolant reservoir after idling for about 10-15 minutes.
Interesting to me, the temp gauge only read between 1/2 and 3/4 when it boiled over.
Possible relation is a grinding noise coming from the right side of the engine compartment. It sounds like a bad alternator (bad bearings), but the alternator is charging the battery fine. However, there is a definite "grinding ball-bearings" roaring sound. It actually sounds like it is coming from the AC compressor, but I cannot be sure. It could possibly be coming from something under the AC compressor. I am not familiar with Saturns, so I have no idea what is under the compressor.
There do not appear to be any obvious coolant leaks.
Replaced the thermostat on this car about 6 months ago when my daughter owned it. Cooling problem existed then. Replacing the thermostat did not help the cooling problem at that time. Car has not been driven much since replacing the thermostat 6 months ago, about 300-400 miles total.
Where should I begin? Could the grinding noise be the water pump going bad? Would that cause the boil over when temp gauge shows only 1/2 to 3/4 reading?
have the same problem?
Tuesday, April 24th, 2007 AT 9:00 PM