Durango 2WD V6-37L (2009) Radiator Description and Operation
Radiator: Testing and Inspection
RADIATOR COOLANT FLOW
Use the following procedure to determine if the coolant is flowing through the cooling system.
1. Idle the engine until the operating temperature is reached. If the upper radiator hose is warm to the touch, the thermostat is opening and the coolant
is flowing to the radiator.
WARNING: Hot, pressurized coolant can cause injury by scalding. Using a rag to cover the radiator pressure cap, open the radiator cap slowly
to first stop. Allow any built-up pressure to vent to the coolant recovery container. After the pressure build-up has been released,
remove the cap from the filler neck.
2. Drain a small amount of coolant from the radiator until the ends of radiator tubes are visible through the filler neck. Idle the engine at normal
operating temperature. If the coolant is flowing past exposed tubes, the coolant is circulating.
