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By cos - Last Year
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Hello Members Anyone here give steps to bushing rocker arms. Main question is how to get ID of rocker bores out to to new bushing (if even available) OD. Honing seems like it would take forever. No machine shops around here do it, can't even tell how.to do it. Thanks
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By BamaBob - Last Year
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Check with Rocker Arms Unlimited. They do excellent work.
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By paul2748 - Last Year
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Send to Ted - he may rebuild them
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By 55blacktie - Last Year
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Although Ted Eaton and Tim McMaster are among those quite capable of rebuilding your rocker assemblies, it's not likely either will have the time to do it anytime soon. Ted and Tim are pretty much working alone. Tim said that he will not take on any new work for the rest of the year, and Ted is farming out work, particularly heads. Unless you can find a competent shop that's local to do it, you should at least give Rocker Arms Unlimited a call. They are located in Anderson, CA, just south of Redding.
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By cos - Last Year
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Thanks for replies. Not wantiing someone to rebuild, would like too know how it is done. Building a fixture or jig to hold arm for boring and reaming?
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By 55blacktie - Last Year
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Send an email to Ted (eatonbalncing@yahoo.com). He is at Bonneville Speed Week, so he probably won't reply until next week. I've never done what you're attempting, but it might be a bit technical to accomplish from a distance.
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By 2721955meteor - Last Year
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if you can find some one with a older valve refaced they should have a attachment to reface rocker at contact aria(rocker to valve stem. then use a brake hone to clean up the shaft bore. for sure the rocker shaft will need replacement. then you block off the spill tube bymakeing a screw tp go threw rocker stand(tap the hole to take5/15 coarse thread. the set screw will block the spill tube hole as well alight the rocker shaft to line up oil in. while rocker shaft is replaced make sure valve seals are all intact
most of the time the rocker shaft is junk.(you must be sure lots of oil is coming out spill tube
ther is plenty of drain holes to handle the flow from rockers.
the rockers fastest from spill tubes will show the most galling.
I have performed this procedure on a number of cases. with spill tubes not blocked rockers at other end don't get much oil. if headed have bin off and new style gaskets used you don't need tin spacers as they are the same thickness as the new style head gaskets, so geometry of rockers is now the same as the thin head gaskets
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By 1946international - Last Year
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Ok, this is going to be very hard to describe but let's try. I have done this and rebuilt a set of high ratio rockers for a spare motor I have and they came out very nice. What I did was made a jig to mount rockers in the lathe. The jig is a round stock about 3" in dia with the center cut out to about 1.5" or so. Off of this base I welded on a "post" with a hole for a bolt, you mount the rocker through the adjuster hole. I'm going to try to post a photo ( hope it works). Also from the round base there is a bolt and a nut that is used to adjust the rocker so it is perpendicular to the lathe center line. Now, if you install the round base in a 4 jaw chuck, you can center the rocker's bore where you want it and cut away. be careful centering the bore as the wear on one side could throw you off here. 
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By FORD DEARBORN - Last Year
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Nice one!
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By cos - Last Year
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Thanks 1946 any chance of putting up a pic of rocker mounted in jig. As I understand for each rocker it must recenter /realigned every time a different one is mounted?
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By 1946international - Last Year
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 Yes each rocker should be recentered and adjusted so that the bore is parallel with the bed of the lathe. You make this adjustment with the small bolt that the arm rests on. This is really an easy process and takes very little time to set up and to cut out.
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By 1946international - Last Year
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After the cutting out is done, the real work starts. Make or buy whatever bushing you plan on using and press it in, I think I was 0.001" press fit and then ream out the bushing to size, I went to 0.001" to 0.0015" clearance.
Oh, and I cut an oil groove in the center of each bushing, not very deep. You can see the rocker in the photo has a bushing installed and you can see how thin it is. I don't think you want to weaken the rocker by cutting much out, so be careful here. And don't forget the oil hole, drill and deburr it last.
One more thing, when you make the jig, mill the mounting post so the area that the rocker mounts to is parallel to the centerline, do this after welding. remember everything must be straight.
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By 2721955meteor - Last Year
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some one in your aria must have a valvgrinder,they have a attachment that does a great job refacing rockers. if 1 looses their corect arc ,could be hard on the camshaft life.
the inner bore on rockers is less critical, the brake hone will take high spots off. the critical surface on the rocker shaft is a must. buy a new shaft.
with the removal of spill tubes is critical
drain holes for splash oil going to front and rear rocker and shaft as well camshaft life. lots of lube is the key..
my present 292 y has 4years on it, never had to reset valves, dit gear like new(recently removed the list gear like new.
running the engine with valve cover off is messy, but no leaks with covers on.
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