Keep turning it and it'll open up the others. Right now your only turning it half way. No they dont use loctite, but there really cranked down.Becareful when tighten them down because I when I did on my old 04 I snaped the head off and it was a PITA to drill it out it tap it, so just snug them down. In my experiance my pv's never have carbon build up but just a bunch of spooge so I just spray it out really good with carb and choke cleaner and its fine. Becareful and good luck.