Posted by Vaughn [172.68.133.131] on Thursday, July 15, 2021 at 21:45:25 :
In Reply to: Knuckle bolt replacement. posted by AVaughn [162.158.187.120] on Thursday, July 15, 2021 at 18:37:41 :
Standard is grade 5 on the knuckles. PIF, TIP section has knuckle rebuild that identifies the bolts/screws. If you have to replace any you can use grade 5 or 8, but it is critical to maintain the same shoulder/thread length of the current bolt, so you'll need to use a longer bolt and cut it to match in some cases. The difference in using a grade 5 and 8 is the 5 can be over torqued and stretched, grade 8 will stop at the 80-85 foot pounds spec., so no over torquing on grade 8. The knuckle is recessed in the steering knuckle so there is no reason to go beyond a grade 8 bolt, you just need to make sure no grease on threads in the steering knuckle or the bolts/screws when torquing. The ARP bolts may be able to torque to 110 pounds, but you don't need to go beyond the 80-85 foot pound requirement for the knuckle bolt/screws, so you would be throwing your money away. VPW or MWM may have NOS, if not DC truck parts can provide used bolts at a reasonable price.