Thermostat, Engine Cooling

Thermostat Opening Temperatures
Starts to open - 5.4L (3V) 86.7°-90.6°C (188-195°F)
Fully open - 5.4L (3V) 100°C (212°F)
Starts to open - 6.8L (3V) 83°-87°C (181°-189°F)
Fully open - 6.8L (3V) 99°C (210°F)
Starts to open - 6.0L 87°-91°C (189°-196°F)
Fully open - 6.0L 104°C (219°F)