Did you install the intake metal piece underneath the radiator lip or on top of it? If you installed it to sit underneath it, then it shouldn't be rattling.The big metal piece that crosses the entire front of the car. It rattles against the rad I believe. I had some two sided tape there that held for a couple of months but now it came back. So I bought some thicker double sided foam insulation thing to try. It's upsetting considering how much I paid for it.