I searched archives, but didn't find much. Problem is, at idle temperature starts creeping up close to 250, after pulling away temp comes down to normal. Both fans are operating. It did spit up some coolant today after I shut it off. It seems to be associated with RPM, higher it is, cooler it runs. The car has 6,800 miles on it so I can't beleive it's the water pump. Someone tell me it's a thermostat, or cap Please Any ideas? Thanks.