There are several fixes for the loose interference thread adjusters.  Here are just a few of them.

1. Thoroughly clean the threads and use Loctite.
2. Using the 0.002” oversize adjusters if you can find them.
3. Drilling and tapping the sides of the adjusters for either 8-32 or 10-32 set screws that can be tightened into the loose adjusters.
4. Retreading the rockers for a conventional 7/16-20 thread and using the early non-interference thread adjuster screws and jam nuts.  You may have to grind or machine a flat on top of the adjuster for the jam nuts.  (This is the one I prefer)

Here is the link to the thread from which this information came from.

http://forums.y-blocksforever.com/FindPost106489.aspx

Lorena, Texas (South of Waco)

Replace the interference fit adjusters with the lock nut type I reckon.

What would be a permanent solution?

It may not be a permanent solution but, as a temporary measure you could clean the threads & apply Loctite to suspected loose ones. There has been other recent discussions on this topic here..


Paul

I have a 292 that some of the rocker arm adjustment screws are pretty loose when adjusting them. Is there anything I can do to make them more stiff cause I am afraid they will loosen or tighten up by Themself.