Pop open the hood. Take a look at the radiator's upper hose. See how it goes to the engine, then sharply bends down behind the alternator and air conditioner compressor? It's down there. Good luck, and you'll need to go from inside the van. A magnetic socket will help, because you won't be able to see yourself putting the bolts back on to hold it in.
The Haynes manual says you'll need to remove the alternator, but that's not necessary. Just loosen the bracket so you can move it out of the way, but you don't need to disconnect the wires.
simply find the top radiator hose and follow it down to the engine. That is where the thermostat housing is with the thermostat being located there.
It is in the fuel tank.
The coolant temp sensor is located next the the thermostat housing.
The thermostat is located behind the alternator. You can find instructions on Auto Zone's web site.
It is under the housing that the upper radiator hose hooks to on the engine.
Drivers side of transmission.
The coolant temp sensor is located next to the thermostat housing.
Loosen the alternator bracket, move it out of the way. The thermostat is at the end of the upper radiator hose where it curves into the engine
Beside the thermostat housing.
Where is a starter realy located on a dodge ram van
FOLLOW THE UPPER RADIATOR HOSE , TO THE TOP OF THE ENGINE .WHERE THE HOSE CONNECTS , THE THERMOSTAT LAYS INTO THE INTAKE MANIFOLD , BE SURE TO GET A GASKET WHEN YOU PURCHASE THE THERMOSTAT !!I DONT USE ANYTHINNG BUT FEL-PRO GASKETS AS THEY ARE BY FAR THE BEST !!!SPITNHARD79
diagram showing where the thermostat is located