An engine's thermostat regulates the temperature of the engine by controlling coolant flow, its job is to block the flow of coolant to the radiator until the engine has warmed up.
NOTE: If the thermostat has a jiggle pin, check valve, or other feature to assist in bleeding air from the system in a vertical installation, the jiggle pin should be located at the north or 12 o'clock location.

Compatible with Ford 4.6L 5.4L 6.2L 6.8L Vehicles:
1992-2011 Crown Victoria
2003-2014 E150
2003-2005 E150 Club Wagon
1997-2002 E150 Econoline
1997-2002 E150 Econoline Club Wagon
2003-2014 E250
1997-2002 E250 Econoline
1997-1998 E350 Econoline
1997-2002 E350 Econoline Club Wagon
1999-2019 E350 Super Duty
2000-2019 E450
2000-2005 Excursion
1997-2014 Expedition
2002-2010 Explorer
2007-2010 Explorer Sport Trac
1997-2014 F150
2004 F150 Heritage
1997-1999 F250
1999-2022 F250 Super Duty
1999-2022 F350 Super Duty
2017-2019 F450 Super Duty
2017-2019 F550 Super Duty
2013-2019 F650
2016-2019 F750
1996-2010 Mus-tang
1994-1997 Thunderbird

Compatible with Lincoln 4.6L 5.4L Vehicles:
2002 Blackwood
2006-2008 Mark LT
1998-2014 Navigator
1992-2011 Town Car

Compatible with Mercury 4.6L Vehicles:
1994-1997 Cougar
1992-2011 Grand Marquis
2002-2010 Mountaineer

Replaces Part #: RT-1234, RT1234, RT1254 thermostat.

NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts.

NOTE: To ensure accurate fitment, please confirm your vehicle information in the above compatibility section and the description.