Description:

The radiator cap holds the coolant inside the radiator, but it also works as a two-way valve that keeps the right pressure inside so the radiator does it work correctly. If the pressure isn't maintained, the coolant can boil and evaporate, putting the engine at risk of overheating. Symptoms of a Bad Radiator Cap: air enters the system, low coolant level, coolant leaks, overflowing reservoir, overheating engine. Fitment: for Ford: for 1992-2011 Crown Victoria 2003-2014 E150, E250/ 2007-2014 Edge/ 2000-2005 Excursion/ 1997-2013, 2015-2017 Expedition/ 2002-2005, 2011-2019 Explorer/ 1997-2017 F150/ 1997-1999 F250/ 1999-2016 F250 Super Duty/ 1997 F350/ 1999-2017 F350 Super Duty/ 2009-2019 Flex/ 2006-2013 Fusion/ 1996-2014 Mustang/ 2013-2019 Police Interceptor 2001-2011 Ranger/ 1996-2019 Taurus/ 1994-1997, 2002-2005 Thunderbird/ 1999-2003 Windstar/ radiator cap. Replace Part Numbers: RS-527, 9C3Z-8101-B, RS527, 9C3Z8101B radiator cap. The radiator cap can Compatible for Lincoln and for Mercury: for 2003-2005 Aviator/ 1995-2002 Continental/ 2000-2006 LS/ 2009-2016 MKS/ 2010-2019 MKT/ 2007-2017 MKX/ 2007-2012 MKZ/ 2006-2008 Mark LT/ 1993-1998 Mark VIII/ 1998-2017 Navigator/ 1992-2011 Town Car/ 1992-2011 Grand Marquis/ 2006-2011 Milan/ 2005-2007 Montego/ 2004-2007 Monterey/ 2002-2005 Mountaineer/ 1996-2005, 2008-2009 Sable. Constructed with premium materials for durability. Designed to function on open cooling systems and overflow reservoir type systems and allows the cap to be installed and removed much easier. Once you have a replacement and your engine is cool, simply unscrew the old cap, and install the new by screwing it on.