I took the rocker shaft off and ran a wire down the oil hole. the wire only goes in about 4in (thickness of the head?) also tried air pressure still no oil out of the right head, the left side has plenty of oil flowing out the overflow tube. I can pump oil into the overflow tube on the rt. side and get oil flowing to all the rockers so the blockage seems to be in the block, anybody have any tips, words of wisdom. thanks Reno .... tried to post pictures but not having any luck.

 

This was covered in a previous post fairly recently. The oil passage dog legs at the block so that is why the wire wouldnt pass. The poster that had this same problem also tried air without results. Best bet seems to be to use hydraulic pressure to dislodge the obstruction. Use a low melting point grease, maybe assembly lube. Fab a plate to attach to the top of the head, bolted into the holes used for the rocker stand. Drill and tap the center of the plate for a grease fitting positioned over the oil outlet. So far as I have heard, this about the only corrective action, short of a tear down.

 

Relic,

You've probably verified this already, but was/is the shaft installed correctly? If not, your trick with the overflow tube would oil the rockers, but nothing would be able to come out of the block. Courtesy of John Mummert's site:

"Rocker shafts. It is amazingly simple to install the rocker arm shafts upside down on a Y-Block. The shaft stands are identical and will bolt down either way. You must be absolutely certain that the oil hole in the shaft aligns with the hole in the stand and is at the bottom when the stands are bolted down. If done improperly no oil will get to the rockers. The best way to check for proper assembly is to look for the holes for the overflow tubes at the right hand end of each shaft. If the hole is visible with the rocker arms installed on the head it is correct."

If this engine has been running for a while & oiling fine- and now it isn't, with no obvious reason why (like the shaft being re-installed wrong)- then I would guess that you have some debris, as 46Y mentioned, or a partially melted cam bearing. If the grease trick doesn't work you could try pulling that head only.

Last, & probably waaay too obvious, so please don't take offense: Do you have good, verified oil pressure? Is there enough oil in the pan? I don't think it's the problem...on the other hand a local kid had a similar problem on a SBF....turned out he had almost no pressure when I checked it with a gauge...one side oiled okay....but, no pressure due to a plugged filter...

 

Rusty,
I have some ideas on the hydraulic trick, if you use it. Before bolting down the plate, fill the oil passage with a light weight 5Wsomething oil. If it wont fill, then it would mean the top end isnt oiling due to a worn cam bearing, assuming the checklist provided by homespun has been gone through.
If it does fill, then when you apply pressure via the grease fitting, only one or two cranks should be needed on the gun for dislodgement.
To see if you are successful, remove all the spark plugs and spin motor, looking to see if oil exits out head. Then you can clean up most of the grease and other debris sitting on the head.

 

Try spraying a solvent in the oil hole to see if it fills up. If it does, let it soak overnight to dissolve some of the sludge. It may take a few trys to clean it out. If all else fails remove the head and clean out the oil passage in the block with a small brush made for this purpose. You can get them at Harbor Freight. They look like a miniature bottle brush and come in a variety of sizes.

 

Thanks for all the good info.... 1 more thought, I have a fram oil filter, from some of the posts I've read thats a problem. I had ruled the oil filter out because I was getting oil the the left side. homespun91 you give me reason to look at that again. Thanks 46yblock, homespun91, and rogerf100 [IMG]jpg[/IMG]

 

Let us know how everything turns out.