Originally Posted by
ShaolinLueb
not to sure where it is tark. i know sometimes cars with bad thermostats have over heating issues. go over to the g35. thermostats aren't the cheapest so check before you replace it.
seriously? Thermostats are like 7 dollars.......
I would also have your radiator cap tested. If it is failing, it will allow pressure to escape under high heat ie with the A/C on and allow the coolant to become de-pressurized and overheat.