I was wondering if anyone had replaced these or not when doing head repair. I noticed a few of mine were stiff and didn't have any movement to them in the longitudinal direction where all the others did. So I ordered some replacements and inspecting them out of the box they all exhibit the same behavior. Is this something you just replace and let it go or is there a process to go by before it gets installed? Unfortunately no Bentley and not sure if it goes that far into head repair.

Here is the part in question.
https://www.fcpeuro.com/products/min...er-11337549632


Where it goes. #8