Leaf spring eye bolt

[Hipster]

Not sure 90 ft-lbs would stretch them but I believe technically U-bolts should be replaced. It's more important that they be torqued properly and not gunned down with an impact. Over-torqued can bind the leaf pack and lead to broken leaves within the spring pack.

 

[618 Syndicate]

Not sure 90 ft-lbs would stretch them but I believe technically they should be replaced. It's more important that they be torqued properly and not gunned down with an impact. Over-torqued can bind the leaf pack and lead to broken leaves within the spring pack.

Learned that lesson the hard way.

 

[Erik the Awful]

They are stretched during proper installation and put under tension. Thus not reusable

A bolt stretching in use is normal, and does not make it unusable. If you stretch the bolt past its yield strength, to where it cannot spring back to its original length, then it becomes unusable. That's the whole point of torque-to-yield. The engineers figured out that there's a point where you can stretch a bolt before it breaks where it grips better, but once it's been stretched that far, it's junk if it's ever removed. The u-bolts don't get stretched that far, unless some gorilla's over-torqued them.