Radiator Issues! :-[, Keeps burning/losing coolant Options

[JoKeRkId613]

Okay, here's my situation:
1. Blew my OEM radiator(cracked)
2. Temporarily replaced with a Honda radiator
3. Just put in Koyo radiator(looks just like the factory one, just brand new)

-I bought a crap load of coolant.
-First thing I did when all hoses were connected and the car was off(which i think was a mistake...there was no coolant in the radiator at all...it was flushed) was that i poured in coolant until the radiator filled to the top.
-I put the radiator cap on.
-The car hasn't overheated at all.

Currently, I'm running without the radiator cap because I was told I was supposed to have the car on and let it reach a certain temperature before i poured in the coolant. So I'm letting the car take in as much coolant and then refilling so it circulated correctly.

QUESTION:
What shoulda been the proper way to do this from the start? My car still steams every once in a while and it loses coolant a lot and i have to refill. HELP PLEASE!
I have a new thermostat, perhaps I should change it? How is this done...anyone got pics?

[94GT]

Yeah, you don't want to run straight coolant. First off, it probably doesn't cool your engine as well like Madmods was saying. Also, it's thicker than water, which makes your water pump have to work harder to push it through the system. This can lead to an earlier water pump failure. It's an easy fix. Just use the drain valve on the passenger side of the radiator at the bottom. It faces towards the engine bay and it's plastic (probably still white since it's new). Drain some out, add in some water at the top to replace it (make sure the engine's cold when you do this), and after running it for a while, use one of those testers I mentioned to see if the mixture is right. If it isn't, just keep going...