I have a Dodge Caravan 2000 w/ 3.0L engine and changed the coolant in the summer. The hardest part was getting the drain valve out and back in again. The drain valve i located on drivers side lower portion of the radiator that faces the driver. You can access it through the top and reaching down to get it. use a pair of pliers but nothing that locks on.
The drain valve is made of plastic so be careful. The trick is to push the drain valve in and then turn it before it will come out. I found that i had to push the drain valve in with considerable force before it would release. If and when you get the drain valve out, you will want to make sure the little rubber gasket around the drain valve is still in good condition.
Mine wasn't and i had to replace it. I found a suitable gasket at a department store automotive section. It came in a package with a bunch of other different sized gaskets (had to buy the bunch). Anyhow, you may have to push the drain valve in and then turn it before it is in properly.
Other than that, make sure you use the proper coolant and mixture for the climate you'll be driving in most. the owner's manual will give you an idea of how much coolant it will hold. i went through about 10 liters to fill mine up. I'll admit that changing the coolant was frustrating at times and i spent a lot of time getting together everything i needed and properly disposing of the old coolant. It was a learning experience. I saved myself some money but i think next time I'll get someone else to do it for me.
When the engine is cold you can add to either the radiator or the coolant recovery bottle.
On the back side of where the upper radiator hose hooks to the engine.
in the coolant resivor
Two wire sensor, just behind where the upper radiator hose hooks to the engine.
Two wire sensor very near where the upper radiator hose hooks to the engine.
The engine coolant temperature sensor is the two wire sensor near where the upper radiator hose attaches to the engine.
If there is a cap on the radiator you can check to see if the radiator is full , and if it isn't , " top up " the engine coolant . Otherwise , you check the engine coolant level at the engine coolant reservoir when the engine is cold and maintain the level at the cold mark
Radiator stores engine coolant for circulation throughout the engine The radiator is placed at the front of the engine and exposed to the atmosphere to keep coolant cool to maintain proper engine temperature
It is a flexible conduit for the coolant to flow between the engine and the radiator.
Remove the radiator cap when the engine is cool and add the coolant into the radiator or you can add to the coolant overflow bottle. DON'T remove the radiator cap when the engine is hot!!!
On a 2003 Ford Ranger : The 2.3 litre four cylinder engine has a thread on cap on the engine coolant reservoir , that is the pressure cap / radiator cap ----------------------------------------------------------------------------------------------------- On the 3.0 and 4.0 litre V6 engines , I believe there is a radiator cap on the top of the radiator , but with the engine cool you should add engine coolant to the engine coolant reservoir - it has a cold fill mark
there is no real radiator cap. On the left side of engine compartment there is a coolant jug. This where you would add coolant to radiator.