When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
No you don't need it but,I would install a brand new crankshaft pulley bolt when you install your underdrive pulley set for extra insurance and added peice of mind.Also it would be a great time to install a brand new serpentine belt too.