THIS THERMOSTAT WILL FIT 1996-2003 Ford 7.3L trucks starting with Engine Serial #201681. Not for use with 1994-1995 trucks unless you have installed a 1996-2003 water pump.
Torque Specs for Thermostat Housings: 100-110 in-lbs
Here's a little background on the Ford Powerstroke thermostat...
203° IS THE TEMPERATURE THAT NAVISTAR DESIGNED YOUR TRUCK TO RUN AT. THIS IS THE THERMOSTAT THAT WAS AND STILL SHOULD BE IN EVERY POWERSTROKE 7.3L.
Until 1996, all 7.3L Powerstrokes that were manufactured used an International water pump and an International short stem 203° thermostat . In 1996, Ford changed to a lower degree 195° thermostat. They changed water pump designs at this time as well. The new pumps required the new long stem 195° thermostat in place of the short stem to properly seat the bypass disk. All 1996-2003 Ford PSD's now come equipped with a long stem 195° thermostat. Recently the factory replacement thermostat available at the parts counter changed to 192°. Our Dieselsite 203° uses the correctly sized t-stat with the correct temperature spring so that we no longer have to give up the benefits of running our vehicles where they were meant to run.
DieselSite part number: DS203