Leaking from valve cover gasket or cam seal, & is this cap fried?

[jeffnhiscars]

http://www.amazon.com/Tracer-Products-TP34000601-Fluorescent-Detection/dp/B000JFHNTM/ref=sr_1_2?ie=UTF8&qid=1403088599&sr=8-2&keywords=oil+leak+dye

I bought mine at a local oreilly but inventories can vary