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.
Symptoms of a bad or failing thermostat: high temperature reading and engine overheating; low temperature reading and underheated engine; temperature changing erratically; coolant leaks around thermostat housing or under vehicle.
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.

The Thermostat Compatible with Ford 7.3 Powerstroke 7.3L Diesel Vehicles:
2003 E350 Club Wagon
1996-1998 E350 Econoline
1996-2002 E350 Econoline Club Wagon
2000-2003 Excursion
1996-1997 F250
1997 F250 HD
1999-2003 F250 Super Duty
1996-1997 F350
1999-2003 F350 Super Duty

Replaces Part #: RT1201, RT-1201, F6TZ-8575-EA, F6TZ8575EA 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.