i just got my water pump replaced, timing belt.. my gauge now it like started jumping around and the motor was runs fine it doesnt overheat or nothing and then it goes all the way up to H (red) past taht...and it stays up there and doesnt go down...but the motor still running fine i mean ran it like that for like 30 mins from tampa to clearwater..no smoke no overheat...what could this problem be? could it thermostat...or maybe the actual gauge...any suggestions or help would be highly appreciated..thanks