It is under the housing where the upper radiator hose hooks to the engine. The spring side goes towards the block.
No, they are not interchangeable.
Normally you Install with the spring down.
cooling thermostat
The thermostat on a 4.7L is under the housing where the lower radiator hose hooks to the engine.
The thermostat on a 3.7L V6 is under the housing where the lower radiator hose attaches to the engine.
The thermostat on a 2002 Dodge Quad Cab is located just below the pulleys on the fan belt. It is on the passenger side front of the motor, in the end of the largest hose that comes off the radiator.
The thermostat is located under the housing where the lower radiator hose(yes lower) hooks to the engine.
Under the housing where the upper radiator hose hooks to the engine.
Lower radiator hose at the engine block. Most Dodges have it there.
Above the timming cover
It is under the housing where the lower radiator hose hooks to the engine.
Follow the lower radiator hose to the engine, it is there.