Hello Everyone,

I was hoping you could help me, I’ve had my F3 parked for maybe a month and when I started it up the other day I noticed a rattle under acceleration.

I’ll attach a video for reference, noise is more prominent at the end but you will notice it’s not coming from top of the block making me think it’s not OHC issue also chain tensioner is manual and was adjust before parking.

Any ideas what might be causing this?!

https://youtube.com/shorts/2iNMGRkMSxM?si=mB_2sv7Qr2PZGQtK

 

I think I have found the issue was actually the 4 to 1 box in the exhaust, hopefully get it off this weekend to have a proper look