"I was under the impression that the 1:1.54  ECG **** A2 rockers with 2 pce adjusters were from 1956.. but the article doesn't indicate that, so that is a ??"

ECZ-A2 (two piece adjuster) is early 1956 and ECZ-B2 (one piece adjuster) is later 1956. There was a production break/upgrade somewhere in the year and all info was deleted from the 49/59 MPC FINAL ISSUE. It shows only a Service Replacement of C0AZ 6564-A (1960 PN). The 63 292HD with the Allen screw adjuster would be described in the TRUCK MPC of the period.
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Paul-

do you still have them? I need them for my 56 Thunderbird. PM me at mra01@hotmail.com.

Marc

Marc - still have them - sent you an email


54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

N.B.- I was going to enquire of Rocker Arms Unlimited re Y-Blk valve train parts or rebuilt units etc.. However, noticed they are in Redding Calif. This is likely not a good time to bother them with enquirys, due to the terrible fire situation in that area...  I hope all is well with them & anyone else on this site that might be from that area.. Best wishes!.. 


Paul

I didn't want to start a new thread cause  I have a question about rocker arms.   I'm going through my arms,  and I have a set that are on new shafts and have supposedly been reworked.  However,  about half of them still have wear spots from the valve tips still showing.   You can see they've been ground on,  but not enough to remove the spots.   Is there a limit of how much material you can remove?    They are on new shafts and don't have any sloppiness on the shaft part.   

Don't know about a grinding limit, but it sounds like someone maybe ground the ones U have just enough to allow a feeler guage to work properly...


Paul

Have the rocker bores on those been rebushed, or honed? I think that's the important part. Many Y blocks were run without adequate oiling up there and the rocker bores and shafts exhibit heavy galling and scoring on the underside. I wouldn't worry too much about the rest of it.

Although, for whatever it's worth - the Ford shop manual says

"If the pad at the end of the rocker arm has a grooved radius, replace the rocker arm. Do not attempt to true the surface by grinding." (emphasis theirs)

Wonder why they had their panties all in a wad about this? If maintaining the proper radius is a concern, there are rocker grinders that do just that. Done all the time. Surface hardening only so deep? Maybe, but Y rockers in general are getting a little tough to find and/or spendy when you can get them.

The concern by Ford likely centers around the finish, the radius, and the depth of the grinding performed by people not really trained to do that.  And then down the road at a later date, ‘regrinding’ again which simply reduces even more depth and possibly getting into softer material.  If I was a dealership back in the day, I’d definitely be putting new rockers on rather than refurbishing.  As you mention, refurbishing rockers is now a way of life now that the engines have been out of production for a half a century.

Lorena, Texas (South of Waco)

I was asking  because if I can dress the rockers myself,  I would.   I have a friend who has a Black and Decker valve grinder that he says I can play with.   There is a rocker grinding attachment for $95 on Ebay.   If I had the dimensions I could make it myself.   That way I could get rid of the divots in those rockers that still have them.   I just wonder how much can come off before you weaken them to unusable.

Can you post a pic or two, representative of the rocker tips that still have them? Interesting question. The next question is, what did they do to address the rocker bore wear, honing or sleeving?

Had to hunt around a bit and buy them in onesies and fivesies etc., but was able to put together a complete set of NOS stock ratio 6564 rockers for an average of $5 - $7 per delivered.