Took a trip to norcal and back (about 1k miles) in a span of 4 days. Came back and started to notice my engine making weird a weird loud noise as I rev the motor. Its not showing any codes so it cant be the motor. My guess would be the flywheel because it sounds okay at idle until I press the clutch in and then release it. After I release the clutch, it starts making a different sound thats not in the videos. The videos show the weird noise.

I want to take it to my mechanic but I start my last semester of college tomorrow and dont have any time. Any help would be very much appreciated as I cannot diagnose this issue! Belpw are the 2 videos I took of the sounds.

the car is a 2003 350z with 171,044 miles on it. Again, no engine codes are showing and guages are all normal. Thank you!

https://youtu.be/WMLwaS-Q0fk
https://youtu.be/wYMiizZgY60​​​​​​​

 

 

rod knock won't throw a code