Home of the 305k 2012 V6 Honda Crosstour
No need to scare the public to run to the dealership for this.I had this problem myself!!! It was the most annoying problem I ever had on my pilot. Long story short ONLY USE HONDA PARTS INCLUDING TENSIONER,THE BOLT!! AND SERPENTINE BELT. AND ONLY LET HONDA INSTALL IT! This is the only thing I ever payed the dealership to do in 10 years, as it Fuxxked me numerous times.
I used the weld the nut on procedure that Nail Grease said to remove the bolt, I would listen to him on this one!! I learned not to use anything but Honda Parts from this experience...
A welder could damage the bolt hole I believe, that is why this is best left to Honda.
I've reused bolts and aftermarket tensioners with no issues. Clean bolts, chase threads, use neversieze, buy right.