Quote:
Originally Posted by 4pipes
Considering that the major load is forcing the roller up into the body, I would guess that the press fit of the shaft into the body was excessive, and as a result left a microscopic crack at the time of assembly. The crack propagated under stress (vertical vibration).
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So you are thinking they were just a defective set?
I checked my valve springs and they are the X302 set that Ford states is compatible with roller camshafts so I don't think there is an issue there. I am wondering if the spider is creating an issue. One of the dogbones was a little loose. However the lifter under that dogbone was actually fine. I guess I will wait and see what KC has to say.