Originally Posted By: Jakegday
well [censored]! i know i have gotten all of the air out, the radiator cap looks great. i dont think i knocked any crud off that makes it read more accurate, because according to lots of other grand prix owners on the internet, the way my car was before is the way its supposed to be, and where my needle sits now, is indeed, warmer then usual.
its warm to the point of making the radiator fans run constantly, when normally the only time they run is when i sit in a drive thru line for a while
so theres no chance a cheap coolant would make it a tad warmer?
Verify the gauge's readings with an infrared thermometer on the Tstat housing and the upper radiator hose. It is possible that some gasket material, dirt, sealant, etc got in the cooling passages and is causing a flow impedance, as mechtech2 suggested. I cannot recall if the GP has 2 separate temperature sensors for the ECM and temperature gauge. If they use the same sensor, and that sensor were faulty, then the fans would indeed run more as a result of the perceived temperature increase.
If you think that the issue is the coolant itself then I would flush it out and replace it with something that you trust. At least then you would have the opportunity to flush the system again, remove any additional dislodged crud, and replace the coolant with the proper mix (winter is coming soon). If it doesn't help then look elsewhere.
