hello sirs, I have a Mitsubishi Eclipse 99 car, and recently I became very very wary of overheating, because, of all the nastiness that too much of it entails... that being said, dahil mainit ang panahon lately, i've adopted this habit of pouring water on the radiator to cool off the radiator/engine, nakita ko kasi noon pag nag-ooverheat ang kotse yun ang binubuhusan ng tubig, dahil bawal nga buksan yung radiator cap etc.) it works naman, the temperature goes down etc.

My question is, is this a good practice or is it bad for the radiator itself?
I like it because it cools the engine quickly, but lately kasi i do it in the middle of long drives (park at a gas station for example, then pour water on the radiator, kahit wala namang overheating, just to be sure) and after going home, pouring water on it to cool it and then turn it off after it became "cooler."

thanks!