F 350 4WD Super Duty V10-6.8L VIN Z CNG (2003)
Thermostat: Specifications
Thermostat Opening Temperatures
Starts to open - 6.8L .................................................................................................................................................................. 83 - 87°C (181 - 188.6°F)
Fully open - 6.8L ..................................................................................................................................................................... 96.7 - 100°C (206 - 213°F)