As Stuart says, the pictures are a little dark, but it almost looks as if the oil supply line to the rocker arm shafts is missing. The
1951 Shop Manual, page 6-5 and
page 6-38 is not real helpful, but take a look and see if your engine has the tube from the pushrod cavity to the head and rocker arm center fitting. The drawing on page 6-5 is of the 235; I could not quickly locate a good illustration of the 216. You might want to look through some of the other shop manuals on this
great site. Hoyt
