belt pulley alignment tool

thingiverse

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/gp/product/B072XGNKZ4/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&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).