ticking not fixed by valve adjustment

Tried the hose trick to locate the sound. Best I can get is that it is in the #4/#5 area under the valve cover. That's where the explosion and bent pushrods were.

Pulled the valve cover, inspected (again), nothing obvious. Observed the running engine and noticed the oil seals on the valve stems are all different. While running, some seals moved up and down, others were stuck up, others were stuck down. Only the seals at the #4 & #5 were moving up and down with the valve stem. Seems wrong?? What holds them in there? Think that's causing the ticking? I've never pulled a head apart before. Wondering if I can fix it without pulling it apart...Is it broken?