2.5 LITER NON TURBO. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure The Engine Coolant Outlet Housing or related components. Engine Coolant Thermostat Housing Bolt. Ignition Coil Bolt. cover. hsng. outlt. Coil stud. Engine Coolant Outlet Housing. Ignition Coil. M. A. P. sensor. Water manifold. Water valve.