ok so my rocker came loose i tightened it up it came loose again i removed it put locktight on it it came loose again . i changed rocker stud and pedistal it came loose again only 1 hr between it coming out the threads are good no cracks in head new bolt new rocker new stud new pushrod whats up its my #5 exh rocker this is on a stock sc well ported heads stock cam for now . anyone ever had this problem with bolt comming loose?