2.0 LITER. CONVERTIBLE. 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 Expansion Tank Hose. A component which prevents a leak at the Cooling System Bypass Line. A Seal that prevents oil from leaking out, or contaminants from enteRing the Cooling System Crossover Line. Engine Coolant Bypass Pipe O-Ring. Engine Coolant Pipe Seal. Engine Oil Drain Plug Gasket. Seal for the Turbocharger Coolant Line. Turbocharger Coolant Line O-Ring. Turbocharger Oil Line Gasket. Turbocharger Oil Line O-Ring.