I have two separate weird noises that I can't figure out why they would be there.
First one I get when im driving and let off the gas while im in gear, I get this weird gurgling/metal grinding sound coming from the engine.
The next one I get is when Im at about 2,500-3,500 rpm as well as when Im accelerating from a stop it makes this loud vibrating noise. It doesn't do it when im in Neutral though. This problem only started after I left my car parked for close to 3 months and I got the alternator swapped out as well as a new serpentine belt and tensioner pulley. I know that in order to get the alternator out you need to unbolt close to 20 different parts so maybe one of them wasn't tightened all the way back up or something.