Ive been having so overheating issues with my motor, so I hooked up a coolant pressure tester to it. I pumped it up and noticed the pressure falling, and with the car running when ever the engine is revved the pressure tester shows that its going into vacuum. Does anyone know what this means?
The lower radiator hose doesn't seem to be collapsing, Ive been leaning toward the head gasket but I thought the pressure would spike if it was a head gasket.