I've got a 1986 3.8l 6-cylinder mustang. I've been hearing a ticking underneath the driver's side valve cover, so I took it off. I didn't see anything wrong so I started the engine sans valve cover. This is what it looks like.
Oil doesn't appear to be flowing up to the top of the two middle valves. I'm assuming those valves are the ones that are ticking as well. What would cause this?