when I turn my key to the off position my motor stops but then it sounds like a series of clunk clunk clunk slowly fading away in sound for maybe a second.,.. I was underneath it last night had my bro turn my car off, it seems like it runs fine no really loud knocks anywhere, but he turns it off and it makes a clunk clunk clunk noise, not ridiculously loud but loud enough to hear it in the car with windows down radio off and a good set of ears.. sounds like a definite bottom end clunk how bad is this/ anyone else experience this? also It is not an exhaust piece..

 

easiest solution is to drop the pan if somethings hitting ull prolly have metal, and u can go from there

 

exhaust rattle?

 

it appears to be exhaust