HAVE YOU REMOVED THE SPILL TUBES,AND BLOCKED THE HOLE IN THE STAND.IF YOU ARNT GETTING GOOD OILFLOW AT EVERYROCKER,NEXT YOU MAY BELOOKING FOR A NEW CAM ETC

I'm assuming good oil flow at the rockers.  I’ll suggest ‘bluing’ some of the pushrod cups and run the engine for about a minute and then checking the wear pattern at the pushrods.  With a locking nut adjuster, I do not think the problem is in the threads but is instead at the adjuster ball to pushrod cup fitment.

Lorena, Texas (South of Waco)

I would give Smith Brothers or Manton a call. I’ve worked with both over the years with push rods and both offered adjusters. They do offer adjusters that are cups and not balls but your really looking at the threads in the arm.
Have you screwed in a 7/16” fine thread bolt as a test to see if they are as loose as your adjuster now. Just a thought.

56 Vic, B'Ville 200 MPH Club Member, So Cal.

The wear mark on the ball is pretty small on the tip and it's football shaped.



The Harland Sharp adjuster has a ball +.0125 wider which would produce a tighter fit in the cup.





.150 Stroked Y-Block:327.25 ci @ >1hp per ci
 

Look at the ball and the wear pattern. I suspect you have a pushrod to adjuster ball mismatch. I have made the same mistake before and thought it was that the balls were “soft”. Measure the two and I suspect you will have your answer.

Mike, still lovin his 57 t'bird after 53 years!

Valve lash is not holding steady after first few runs:

First run: lash opened .006 Second run: the same thing. Third run: I adjusted lash again at .020 cold and then ran the engine for 5 seconds. The lash has opened up again, this time after just a few seconds. I think that if there is something failing at this fast of a pace it would be gone/done already.

The threaded adjusters measure .4360 on the OD of the threads, the ECG rocker ID measures .4395 on the groove. That is a .0035 difference without the depth of the grooves added.

I found two postings that both mention either damaging the threads or using oversized adjusters. Any words of wisdom will be greatly appreciated.

Rocker adj nuts
Loose rocker adjusting screws. - 332-428 Ford FE Engine Forum

Harland Sharp makes these screws but I'm not sure they will fit, threads are +.004 wider and the ball is +.0125 wider, If the 1.200 is the length of just the threads seems like they should be a tighter fit: 7/16 - 20 x 1.200, 3/8 Ball, Ford FE 






.150 Stroked Y-Block:327.25 ci @ >1hp per ci