2016-19. 3.6 LITER. Thermostat hsng gasket. A circular disk covered in rubber or plastic with a hole in The center where The edge is sometimes tensioned by a spring that prevents fluid from leaking at The Engine Coolant Outlet Housing. Engine Coolant Thermostat Gasket. Engine Coolant Thermostat Housing Seal. Engine Coolant Thermostat Seal. Lower Housing to Engine. Thermostat Housing Gasket. Cooling Housing. Hsng. Unit. Water Neck. Included with: Thermostat Housing, Thermostat Unit, Water Outlet.