Hi I was wondering what would cause a pcv hose to break. My neighbor noticed it yesterday. The hose broke where it connects to the valve cover on the left side in the back. The same coupler hose also broke on that. The break was behind the intake. I can't remove the old hose in the back where it broke. Any suggestions. The car is a 1998 Z28 Chevy Camaro. 5.7L 350 motor. Thanks.