Originally Posted by Jerry Bransford
Sounds like maybe the radiator cap is leaking pressure. Is it screwed all the way down? If it is and it's leaking pressure prematurely, replace it with a new cap with the correct 18 lb. pressure rating.
checked this morning and it was screwed all the way down and when I unscrewed it I couldn't pull it off
another thing I notice is after I turn my Jeep off there is a hissing sound coming from the engine when I'm outside the Jeep like the its releasing pressure, it lasts for a few seconds and then its gone.