Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
NinerBikes wrote:
snip...
At times, I don't know what Bosch was thinking, every roller cam I've ever seen had a rocker arm for alignment that the roller was attached to, and had motor oil as a bath for lubrication, not diesel fuel with it's stinking low Centistoke viscosity of 1.5, versus motor oil, with additives for barrier protections from 12 to 15 centistokes.
But then, what do I know... just basing it on history. for the life of me, I don't see why Bosch couldn't make the bore steel, the piston aluminum, and "D" shaped for alignment purposes and forgo running fuel as lubrication, run motor oil off the engine's oil pan. The piston just needs to provide alignment for the 10mm plunger and bore above it, not seal effectively, nor worry about blow by. There are better ways to keep that plunger in alignment with it's bore than this method.... The merry go round style cam with 4 rollers was the epitome of reliable in the old VE 37 systems VW ran.
Ditto your observation
There might be a tiny bit of offset (caster) in the follower grove
That has to be on the correct side of rotation to work
Maybe that is the patented alignment method
If dead nuts centered...I go back to my PPPS
