Dennis,
Not a roller motor, no.
Rail rockers use the valve stem as the locator to establish the geometry between the rocker and lifter for the pushrod to follow. Nothing else is needed to maintain this path. Add now the guide plate midway between the two and these guides would need to be spot-on in the center of the path, and clearly that isn't the case.
You use one or the other: guide plates with hardened pushrods - or rail rockers. But not both.
All-in-all a very silly mistake. Something I should have caught. I guess I'm posting all of this to show the world I'm not perfect after all!
Bookmarks