Originally Posted by
the shop
If you are driving down the road and the temp gauge is normal, the minute I let off the pedal the hot air goes to cold, I've heard back form Ford and they say the same thing about the head gasket leaking, so all get them on order Monday and all let you know the out come,Thanks
The factory temp gauge is nothing but a cold/normal/hot gauge. Basically an idiot light with a needle. Are you blowing coolant out of the degas bottle?