I'm changing my radiator and it appears that i had an air buble in my last one. so before i put the new on, i want to make sure there is no air in it, before i fill it up with coolant. and it doesn't reapeat the same thing.any response would be aprreciated. thank you

 

Fill it up, start the car, let it run for a minute, shut off the car, fill it up again.

 

i would say, fill the radiator (use distilled water and coolant, trust me), go and start the car and turn the heat on. With the car on let it warm up and get to operating temp, keep the radiator filled, after the car is warm and the coolant mixture is toped off, put the radiator cap, make sure is a good one, fill the overflow tank.
Now, my accord has a bleed screw on the radiator housing, is just a lil plug, with the car on and warmed you open it several times till only coolant comes out of it.
Now, what car do you have? try to follow the lower radiator hose and see if in the thermostat housing is there any kind of plug (if not, the whole process i described above is pretty much ok)

good luck

 

The proper way to fill the cooling system is to take off the rad cap, turn your heater control inside the car to full hot, and open the bleed screw on the top of the neck where the upper rad hose attaches to the block. Make sure the hole on the bleed screw is not plugged with crud.

Now pour the coolant into the rad slowly until a steady stream of coolant comes out of the bleed screw. Tighten the bleed screw, put the rad cap back on, and your pretty much done with the fill. Make sure the overflow bottle is about 1/2 full of coolant. If there is any air in the cooling system, it will purge itself over time. Once the motor comes to operating temperature, and then cools down, as it is cooling, the vacuum in the cooling system will draw coolant from the overflow bottle. If the bottle is empty, the system will suck in air.

Check the overflow bottle a couple times after the car has been driven, and cooled down to make sure the overflow bottle still has about 1/3 to 1/2 coolant.

If your upper rad hose neck has no bleed screw, then just fill it till the rad won't take anymore coolant. The key here is to make sure there's coolant in the overflow bottle so the auto purge system can do its job, and draw coolant from the bottle to replace the air that might be left in the system.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jaker &raquo;</TD></TR><TR><TD CLASS="quote">The proper way to fill the cooling system is to take off the rad cap, turn your heater control inside the car to full hot, and open the bleed screw on the top of the neck where the upper rad hose attaches to the block. Make sure the hole on the bleed screw is not plugged with crud.

Now pour the coolant into the rad slowly until a steady stream of coolant comes out of the bleed screw. Tighten the bleed screw, put the rad cap back on, and your pretty much done with the fill. Make sure the overflow bottle is about 1/2 full of coolant. If there is any air in the cooling system, it will purge itself over time. Once the motor comes to operating temperature, and then cools down, as it is cooling, the vacuum in the cooling system will draw coolant from the overflow bottle. If the bottle is empty, the system will suck in air.

Check the overflow bottle a couple times after the car has been driven, and cooled down to make sure the overflow bottle still has about 1/3 to 1/2 coolant.

If your upper rad hose neck has no bleed screw, then just fill it till the rad won't take anymore coolant. The key here is to make sure there's coolant in the overflow bottle so the auto purge system can do its job, and draw coolant from the bottle to replace the air that might be left in the system.</TD></TR></TABLE>


He's right, he made it clearer.

 

Isn't the correct way to fill a radiatior to flush it and then use a RED 50/50 coolant mix and take off the heater hose or unscrew the heater line cap and then top it off..

 

thank you i'm doing it tomorrow and i just wanted to make sure i did it right.