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Noisy rockers

Posted By idaho211 Last Week
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KULTULZ
Posted 14 hours ago
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Did anyone find out if JOHN MUMMERT offers the O/S adj. screws?

C2AZ 6549-A - .0023 O/S

Several years ago, FORD TRACTOR was offering them.


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DANIEL TINDER
Posted Yesterday
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KULTULZ (7/17/2025)
THIS - https://www.youtube.com/watch?v=Pst0mEdD018&themeRefresh=1

... will help explain the system.

https://www.youtube.com/@mummertsspecialvinterests2721/playlists

Interesting.  Didn’t like what he said about the “import imposter/bad metallurgy” aftermarket adjusters (same style as I bought on eBay 20 yrs. ago).  Guess I should check for excessive ball wear, even though they still hold adjusted clearance well.  Too bad he didn’t elaborate re: history.




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KULTULZ
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THIS - https://www.youtube.com/watch?v=Pst0mEdD018&themeRefresh=1

... will help explain the system.

https://www.youtube.com/@mummertsspecialvinterests2721/playlists





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KULTULZ
Posted 4 days ago
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See if this link works - https://www.youtube.com/watch?v=Q7ZjObWyRJU

It shows a correct rebuild.

Also - https://www.youtube.com/watch?v=mRaiMciNbDA


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DANIEL TINDER
Posted Last Week
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I have friction screws AND locknuts (belt & suspenders). Also, the hex screws are then easier to adjust more precisely when using a P&G gapper tool (unless you have 3 hands 😁).

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55blacktie
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John Mummert, ford-y-block.com. He doesn't have online ordering; you'll have to call. The best time to call is between 3:45 and 5, PST. 
BamaBob
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Kultulz, Where are new rocker arm adjusters available from? I have been looking for new ones without any success. Either style would be OK, however I would prefer the lock nut style if I could get them. Thanks for any information!
KULTULZ
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JUST FYI 

O/S ADJUSTERS are available. I would prefer the locking nut style on a HP engine myself personally.

http://yblockguy.com/techtips/rocker_arm_assy.htm



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idaho211
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Rocker arms unlimited. Did run into a problem initially. The adjuster screws were defective. Kept backing off so changed to NOS jam nuts which did fix the problem.
KULTULZ
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The rebuild depends on the quality of parts, machining and assembly - 

http://forums.y-blocksforever.com/Topic167745.aspx



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