Well, I finally got sick of taking my truck my truck to the dealer for this ticking noise I had. I took it in twice fir a valve tick, and both times they told me "it is a normal diesel noise, compare it to another". I pulled the valve cover off it, and sure enough, cyl#5 and 6 exhaust was at . 030". I got them all adjusted, guess what ..... NO MORE NOISE! I will have to call the dealer and tell them a random act of miracles fixed the "normal" noise. 
