jcsb,
Firstly, I apologize for my spelling errors in my previous post (adveRsaries, difFerential, envELOpe, maXimum, recomMended, It's, and recyCLe). As I said, I admit when I'm wrong so I can learn from my mistakes. Thank you for your help. I also apologize if you feel I'm taking up TOO much of your time. I assumed, since you were posting TO the forum that you welcomed lively and spirited debate between TWO or more people. Clearly, I was mistaken.
You missed the point of my original comment. The first part was, both valves and U-Joints are lubricated and while the lubricants are different, as long as there is not a failure of the system (oil pump or seals) the lubricant will continuously do its job. Therefore, oiling or grease is not the issue. The second part was, brinelling will occur to any surface be it the rocker shaft, or U-Joint races, or carpet, or your front yard if a stationary load is placed on it. How deep the dent will be and how quickly the damage will occur, changes based on the surface strength (Rockwell scale value – which is the test derived value, not the damage caused) and the load values, but the damage will occur.
Saying the ratio of the rocker arm determines its angular movement is not a complete answer. Certainly the change in radius of the cam lobe imparts a linear movement to the pushrod. The angular movement of the rocker is then determined by the length of the arm of the rocker on that side (measured from the center of rotation to the contact point of the pushrod) in relation to the movement of the pushrod. If that doesn’t make sense I will happily give you an example (you seemed to not like my last one). The ratio of the rocker arm only determines the multiplier for the movement of the valve in relation to the pushrod.
All of which ties back to my original statement that if the rocker arm does not rotate sufficiently the roller bearings will essentially be static and will damage the valve train. The same will happen to a U-joint with no flex, reference my previously posted link.
In future, if you wish to quote me, please use the full sentence or an ellipsis or brackets as appropriate rather than a truncated non-sentence.
The Hurst article, which you apparently did not read, was simply the most conveniently packaged supporting document I found. Also, Hurst, as a major manufacturer of driveline components has some authority when it comes to proper driveline installation and maintenance. There were several articles and forums making the same statement I did. You can Google it any time you like.
As to your “I worked in an large engineering firm where I would estimate 85% of the other engineers sucked at grammar too!”, better make it 86% and drop the other (assuming you had 100 engineers in such A large firm).
Enjoy your rebuild and I am happy to leave this here or continue, but I have a war to fight.
Don