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.
i have a 91 cummins and was going to turn it up but i think someone has all ready messed with it is there anyway to tell how many turns it has been turned
If the tamper-proof cap is off, then it's more than likely been dicked with. Is the welded collar still on the screw? If that is gone than it's been turned in a good bit already.