How do I know if my radiator has an engine cooler or not?

What leaked fluid now? The radiator is the engine cooler.

what color is the fluid - that will point you in the right direction. Is it Red, Brown or Clear?

Check for leaks in the hoses first

U can fill the radiator with water start the engine let run for 20min if you don't see any thing. Then ck the oil see if bubbly or whiteish then you know that the water might be going into the motor