How to open up rocker arm oil passages.

Progress update. I checked all the rocker bushings, and none have spun so the oil fed holes are where they need to be. Then I soaked the rocker for a couple hours in a very non-EPA compliant parts cleaner that has actually caused the only instance of "flash rust" I've ever seen in person.

I then used a piece of wire in the drill to open up the oil pathway from the center of the rocker to the trough on top of the rocker, working from the trough side. The wire broke through the crud like a metal drill bit going through a piece of wood.

It worked so well, I used the same wire on the oil pathway from the center of the rocker bushing to the end of the rocker that depresses the valve stem. Smaller opening and a longer, curved pathway. While trying this I was thinking about the wire breaking off in the pathway. Yep - broke that wire right off in the end of the second rocker! Because I'm slow in the head, I went to a smaller diameter and shorter wire and broke that wire off in the 6th or 7th rocker.

Yep. I need two replacement rockers!

The rest of the rockers were worked with a thin wire and a pair of pliers alternated with going back in the nasty parts cleaner. Tedious work and a couple puncture wounds in my fingers but those tiny oil passages are functional again for the first time in what must be decades.

Now to go post a "Wanted" advert. for two /6 rocker arms...:BangHead: