Rocker arm oiling

[Terry]

I am doing a top end on my 2.9. The heads clean up nice for having 140,000 on them. I am now in the process of rebuilding the rocker arms. It looks like they could use better oiling than they are currently getting. I have found scoring and some gouges on the rocker shafts. Has anybody modified the oiling of the rocker arms? I am looking for a diagram of the oiling passages so I can determine if I can do some improvement. I believe I can grind some small grooves across the oiling holes for better flow.

 

[ranger2.9]

The oil comes from the 2 center journals off the cam. 1 feeds 1 head .the 2 nd feeds the other head. These passages need to be clean to get the oil to the rocker shaft tube. What I have noticed also is the tube the rockers ride on get all plugged up. This alone will produce the rocker "tick" if I remember correctly the tube has a roll pin in either end with a spring washer holding in a steel plug. If you remove these you can clean the tube sufficiently. This will help improve oil to all the rocker arms provided the passages coming from the cam journals up through the rocker assembly bosses is unrestricted.
But I do remember someone making an aftermarket free floating rocker assembly.