#3. TUBES & COOLING COMPONENTS. A component which provides a sealing surface at the Cooling System Bypass Line. A gasket which prevents oil leakage at the engine oil cooler line. At Engine. Engine Oil Cooler Pipe. Feed. Feed and Return. Gasket for coolant system. Pipe to Turbocharger. Turbocharger Oil Line Gasket. feed seal. By - PASSENGER. Cooling. Engine Coolant Bypass Hose. Engine Cooler Line. Outlet. Turbocharger Line. Vent. Included with: Oil feed tube, Vent pipe.