Do what Tiny suggests. If some of the rockers are getting oil, there is no need clean out the copper tubing that feeds the rocker assembly.
Take the assembly off, take it apart, and clean everything inside and out. Any solvent and wire brushes will clean it nicely.
1. If the shafts are scored badly, Jim Carter sells replacement shafts.
2. If there is indentation-wear on the surface of a rocker where it mates with the top of the valve stem, grind and polish the mating surface on the rocker arms. This will give you a truer adjustment and this will decrease some of the rocker noise/chatter.
3. If you get the parts out of order,
refer to your Shop Manual. Tim
