[Z28EATR]

i was having the same issues with my car. i have underdrive pullies, a four core aluminum radiator and black magic racing electric fan. My car would stay cool when driving but when i stopped LOOK OUT FOR FLYING FLUIDS!!! So i finally decide to buy a new radiator because mine was leaking pretty badly. I bought a 3 core from the mustang depot and while i was changing the the radiators i flipped the old one upside down and a bunch of muddy lookin goo came out!!! I was like no wonder. so i would definately take the time to flush the system if you like me and didnt know that needed to be done. my .02