F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
Thermostat: Specifications
Thermostat Opening Temperatures
Starts to open ......................................................................................................................................................................... 86.7 - 90.6°C (188 - 195°F)
Fully open ............................................................................................................................................................................ 97.8 - 101.7°C (208 - 215°F)