So, say a customer denies the lifter replacement, which dozens have. I have thought about offering installing new pushrods, which we all know the 6.4s are shorter, and thats all ford offers when it comes to both engines. Would you feel somewhat safer tossing in the new pushrods? Less strain on valve train, which is what I really feel is a big contributor to lifter/cam failure
If they deny lifter replacement with me, they get sent to the local flat bill shop. California has some messed up laws and interpretations of those laws when it comes to auto repair.
They look at it no differently than a vehicle that needs a brake repair but the customer refuses to do it and you let them drive away. I either have to call Highway Patrol and have them come out and tag the vehicle as not legal to drive, or have the vehicle towed out of my shop to remove my liability.
They treat an engine repair the same way. If I know, or should have known, that a certain part is a common failure and advise the customer of it, then the customer refuses to repair it and you don't have a mother****ing book reviewed by 3 lawyers saying that then knowingly refused the repair, you're on the hook for it if they ever get stupid.