Why does my front end on my 07 rattle so loud you can hear it

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I’m sorry to hear you're having trouble with your vehicle. If your Civic is making a loud rattling noise from startup until you turn it off, but nothing appears to be moving under the hood, it could be due to a few potential issues. The noise might be coming from a loose or damaged component, such as a heat shield, exhaust component, or engine mount. These parts can vibrate and create a rattling sound even if they aren't visibly moving. Another possibility is a worn-out pulley or tensioner in the serpentine belt system. Additionally, a faulty internal engine component could be causing the noise. Since the noise is persistent, it's important to have a professional inspect the vehicle to identify the source and prevent any potential damage. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!