Where is the radiator cap on the radiator? all thats there is the over flow?

look for over flow tank,there is your cap

Run the car with the radiator cap off and let it get warm. You should see the coolant flowing through the radiator. If you don't see the coolant flowing, you may have a thermostat that's not opening or less likely, a bad water pump. Also, you ned to make sure that the cooling system is completely full; when you take the radiator cap off that condition will be immediately apparent.

CHECK ENGINE COOLANT LEVEL.MAKE SURE COOLANT OVER FLOW JUG HAS COOLANT IN FULL COLD MARK.IF COOLANT OVER FLOW JUG IS EMPTY RADIATOR GOT TO BE LOW ON COOLANT POUR COOLANT IN THE OVER FLOW UNTIL COOLANT LEVEL STAY AT THE COLD FULL MARK.SEE IF RADIATOR DONT HAVE A RADIATOR CAP YOU HAVE TO POUR COOLANT IN THE OVER FLOW JUG COOLANT WILL FLOW DOWN IN RADIATOR UNTIL COOLANT LEVEL STOP AT FULL COLD MARK.IF COOLANT LEVEL OKAY.YOUR THERMOSTAT NEED CHANGING ALSO RADIATOR PRESSURE CAP.HAVE RADIATOR FLUSHED OUT.HAVE ENGINE BLOCK FLUSHED OUT.CHECK ENGINE OIL IF OIL LOOK LIKE MILK SHAKE ON OIL DIP STICK YOU HAVE LEAKING HEAD GASKET THAT WILL CAUSE ENGINE OVER HEAT WHILE CAR IN MOTION.CHECK WATER PUMP MAKE SURE ITS WEEP HOLE NOT LEAKING ANTIFREEZE IF SO WATER PUMP NEED REPLACING.

PLASTIC RADIATOR CAPS ON THE OVER FLOW JUGS YOU TURN COUNTERCLOCK WISE TO REMOVE. THE METAL RADIATOR CAPS ON OLDER VECHICLES. RADIATORS YOU PRESS DOWN OR CAP WHILE TURNING COUNTERCLOCKWISE TO REMOVE CAP.

The newer vehicles don't have radiator caps. There is an over flow resevour next to the radiator, typicaly heater hose size hoses going to and from it. On the top of this there is a overpressure cap that will relieve any extra pressure, this will be where you would refill the system at.

Hope helps (rememnber rated this).

make sure you dont over fill the radiator bottle past max, something else to try is run the system with out the cap on for a few minutes at idle to expel any air pockets in your cooling system.

theres no radiator fill, the cap on the over flow tank is considered the radiator cap, thats where you fill the radiator, hope this helps.

You should not be losing water from your radiator cap. When the water in your system reaches such a pressure that it needs relief, it will normally flow into the overflow tank (the opposite occurs when the system is cold; water flows from the overflow tank into the radiator).
So, the first thing I would do is to get the proper cap for your radiator.
Second, I would check to make sure my cooling fan was running (I'm assuming that you lose water when the engine is hot).
Third, I would make sure to bleed the system if I had to add a significant amount of water (bleeder should be on top of the fitting that your top hose goes to; loosen and observe until water flows cleanly without bubbles, then close).
I have to think that your cap, new or not, is the problem.
Hope this helps you.

anti freeze goes in tthe over flow tank if there is no fluid in there check you radiator if it is full replace the cap it allows the fluid to transfer from the over flow to the radiator

What about the water pump?