I have a problem, I know its not that serious- hope not. My temp guage goes up and down like a Tachometer. When I get on the car hard it goes up past hot. Highway driving it goes back to normal. When I stop for a light up at hot. I put my hands on the radiator and its normal. I mean I put my hands in the coolant reserve bottle and normal. No boiling of coolant no smoke mean while the guage is Still on Hot way up. Any suggestions before I go to the dealer.

 

I dont believe it. No AdVICE