Coolent had a brand new radiator put into car the overflow when coolent Is filled to cold line when cold over flows when run under normal running conditions, if kept on enough coolent in overflow so it is not empty it takes and continues to take coolent over a week or so I have to add more

Just fill it up 1/4 full with coolent. Coolent expands when hot, which will fill the tank up more, so don't over fill too much. If you think your low on coolent, let the engine cool down, and open the radiator cap and fill it full from there. Filling the tank, will not add ANY coolent to the radiator untill it warms up (expands) and cools down (contracts pulling in coolent from the tank only at this moment.)

That's what the overflow tank is for. The fluid will spill out with least resistance. Hence, cap off. Put cap back on and forget about it. The overflow tank will fill and empty when the radiator needs more or less coolant. Just make sure the level on the o/f tank filled to the line marker. It's normal dont worry

That's normal,but add some when engine is cold,get marker and put dot on level,then next after you drive and it completely cools down check your mark,if below,then you have a leak,get under and look.

If the coolant was hot when you noticed water coming out the radiator, that is normal from the heat expansion of the coolant. That is why there are coolant overflow tanks-also called coolant expansion tanks.
When refilling coolant, always top up the radiator, and fill the overflow tank to at least the cold mark level (about half-way up on the tank). With cap off, run engine till the thermostat opens- upper radiator hose will become hot-then shut off engine, add coolant to radiator as needed, replace cap. This method of filling will help to expel any trapped air in the system. Oh, and remember to set your heater controls on high when filling coolant, so the heater core and lines also circulate and expel air.
Check the seal on the radiator cap that it is still good. The cap seal is important to seal the coolant system, as it is a closed system under about 15 psi of pressure. The reason to pressurize the system is that the pressure will raise the boiling point of the coolant by about 10 degrees- important when you consider how hot the coolant has to be when running. OK, enough tutorial-I don't think you have a problem with the water pump! G'd luck, reeve.

To re-fill the coolant make sure the vehicle engine is cold, open the radiator cap by pushing in on it and turning counter clockwise. Fill the radiator with the proper coolant, based on your vehicle use Dexcool or equivalent. Also open cap on the overflow resovoir and fill to the cold line. Replace both caps run your vehicle up to operating temerature let cool back down and check the levels.

DID YOU BLEED AIR OUT THE COOLANT SYSTEM.TO BLEED COOLANT SYSTEM, FILL THE COOLANT SYSTEM THROUGH THE RESERVOIR TANK OR THE RADIATOR UNTIL THE FULL COLD MARK IS REACHED.BESURE TO USE 50/50 HALF WATER AND ANTIFREEZE.YOU CAN BUY ANTIFREEZE THAT IS ALREADY PREMIX 50/50.AFTER ADDING ANTIFREEZE TO RESERVOIR OR RADIATOR FILL RADIATOR TO FULL MARK OR IF YOU DONT HAVE RADIATOR CAP ON RADIATOR POUR ANTIFREEZE IN THE OVERFLOW JUG UNTIL COOLANT LEVEL STAY THE FULL COLD MARK.WAIT AWHILE UNTIL COOLANT LEVEL STOP DROPPING.NOW INSTALL THE RADIATOR OR OVER FLOW JUG CAP.START THE ENGINE AND ALLOW IT TO RUN UNTIL NORMAL OPERATING TEMPERATURE IS REACHED AND THE UPPER RADIATOR HOSE BECOME HOT.STOP THE ENGINE AND OBSERVE THE COOLANT LEVEL IN THE OVERFLOW JUG. THE COOLANT LEVEL SHOULD BE AT THE FULL HOT LINE.ALLOW THE ENGINE TO COOL UNTIL THE AMBIENT TEMPERATURE IS REACHED THEN CHECK THE COOLANT LEVEL IT SHOULD BE AT OR ABOVE THE FULL COLD LINE.ADD MORE COOLANT IF NECESSARY. WARNING BECAREFUL WHEN OPEN THE RADIATOR CAP OR JUG OVER FLOW CAP.USE A LARGE RAG OVER THE RADIATOR CAP TO KEEP FROM GETTING SCALDED.OPEN RADIATOR CAP A LITTLE AT A TIME TO KEEP FROM GETTING SCALDED.WAIT UNTIL ENGINE COOL DOWN BEFORE OPENING RADIATOR CAP OR OVERFLOW JUG CAP.WEAR SAFETY GLASSES.

The best method is to fill the radiator up with a mixture of antifreeze and water. The mixture details should be on the antifreeze container. Once the radiator is full let the car run until the thermostat opens up and you should see the level of fluid go down in the radiator. Fill the radiator again while the thermostat is opened. Then add fluid to the overflow tank to the fill line. That should do it. If you have put in too much it will run into the overflow container when it is not needed in the car.

get ready .. antifrez pan new hoses clamps 10mm.12mm.14.. mm. sockets rachet drain the radiator from lower hose star the car for about 5 seconds . this way the car draints out all the ant.

Run engine from cool, with rad cap off & heater on heat (not AC) and watch for circulation through rad when engine reaches normal operating temperature. Rev engine slightly from time to time for a couple of seconds, to increase flow & help bleed air out of system. Let it run for a while, and watch for increased flow in rad 2 or 3 times. Probably see air bubbles at same time.Hot coolant from engine comes in top, and back out bottom to engine after cooling in rad. The increased flow in rad ,indicates thermostat is opening & circulating cooler liquid back into engine. After 2 or 3 times put cap back on & fill return bottle only to line specified as warm/hot engine level.