Roisin Radiator Cap, Replaces 16401-31650 for 4Runner, Uiser, GX470, IS250 IS350, 50 GS450H

Car Compatibility: -2003-2010 4Runner, 2007-2010 uiser, 2005-2009 2003-2009 GX470, 2006-2012 IS250 IS350, 2007-2011 50 GS450h REPLACEMENT RADIATOR CAPS: The radiator cap holds the inside the radiator, but also acts as a bi-directional valve to maintain proper pressure inside to ensure the radiator works properly. If the pressure is not maintained, the will boil and evaporate, and the engine may overheat. Bad Radiator Cap symptoms: air enters the system, levels are low, leakage, reservoir overflow, engine overheating Interchange Part Numbers: 16401-31650, 1640131650, If the engine cools, loosen the old cap and screw in the new cap Professional high quality style fits or exceeds all equipment performance replacement radiator caps Made from premium materials for durability. Designed to work with open cooling systems and overflow reservoir type systems, this cap is much easier to install and remove

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