[TR] Valve adjustment problem

[Brian Jones]

Ned,

If the valve shaft tips are all the same height, and the rockers are uniform
and all working on the same axis (which they are) then you should focus on
the adjuster and pushrod. Have you adjusted the valves before and was all
normal then?

Is the top of that rocker's pushrod, when at it's highest at the same height
as the other pushrods when they are uppermost? If the levels are not even,
could something have fallen into the cam follower to raise the rod up?
Unlikely I know. Maybe an odd-length pushrod?

Is the adjuster screw moving along its thread in the rocker when you turn
it, or could its threads be buggered? Take the adjuster out completely and
compare with another in your rocker assembly and see if there are any
dissimilarities.

Can't see much else to go for...

Brian