So, the other day as I was parking after getting to school, I realized a noise coming from my engine that I hadn't heard before. It was like a rattle/ taping sound. Even my friend who was with me heard it, and she mentioned it when I was trying to figure out what it was. So once I got home I searched everywhere to see what it could be.
I have arrived to the conclusion that it could be a loose timing belt or a rod knock. but I know many of you on here have more experience with engines than I am, so I wanted to know what you guys think it is.
I have a video here of the sound(
SR20DET Weird Rattle - YouTube ) It gets louder on the side of the intake plenum.
Thanks in advance.