belt pulley alignment tool

serpentine belt alignment tool to check for out of square pulleys on aftermarket or modified belt drives

other parts needed

2x m3 nuts and bolts

line laser
https://www.amazon.com/module-industrial-adjustable-length-line-4pack/dp/B083SJD418/ref=sr_1_7?crid=3TJA1UTRUBT5V&keywords=line%2Blaser%2Bpointer&qid=1642012990&sprefix=line%2Blaser%2Bpointer%2Caps%2C88&sr=8-7&th=1

cr2032 battery holder
https://www.amazon.com/gp/product/B072L6DG6F/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

optional
-011 oring (5/16 id 7/16 od 1/16 wd) or metric equivalent to hold laser lens in focus or use hot glue

set up
you will want to focus the laser to the thinnest line possible and then stand the jig vertically and get the laser to line up with the grove(pictured below).