RAM 2500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1999)
Thermostat Vent Valve-Typical
The thermostat is vertically mounted and uses caged vent balls, which act as valves which bleed air from the system. They also quickly vent air when
the system is being filled.
When coolant temperature reaches 83°C (181°F), the thermostat begins to open allowing coolant flow to the radiator. This provides quick engine
warm-up and overall temperature control. The thermostat is designed to provide a minimum engine operating temperature of 83°C (181°F) and to be
fully open for maximum coolant flow at approximately 95°C (203°F). Above 95°C (203°F), coolant temperature is controlled by the radiator, fan and
ambient temperature.
