Posted by Inno on December 17, 2012 at 17:34:20 from (70.49.136.91):
In Reply to: 202 update. posted by Tony in Mass. on December 16, 2012 at 13:22:19:
According to the valve train page at agcopartsbooks they are "Cap, Intake Valve Stem (Order 830704M91" and "Cap, Exhaust Valve Stem (Order 830705M91)" These are the caps which go directly on the end of the valve stem and make contact with the rocker arm.
The roto cap assembly I was referring to goes on before the valve spring retainer (keepers) and apparently rotates the exhaust valve with each stroke. They have some bearings inside I think, not quite sure just how they work or how to tell if they need replacing or not.
Here's a link to the parts book page. http://www.agcopartsbooks.com/PartsBooksN/Viewer/book.aspx?book=agco/693063
Cut and paste it 'cause I'm not smart enough to make it a clickable link.
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