I have a question regarding a noise I hear from my engine compartment from time to time. I believe it's radiator related, but I'm not sure exactly what. Sometimes when I bring my car to a stop and the engine RPMs are at idle I can hear a wining noise that sounds like it's radiator related...like the water is still running in the system, but is getting restricted somewhere. It even does this for about 15-20 seconds after I kill the engine and nothing is turning. Any ideas?

Thanks,
Morg68Stang