Ever since ive put this 6 bolt in the timing belt comes loose after it sits for a while(like an hour or more), but after you start its tight again, turn it off and its tight, even if its loose and you turn the crank by hand it tightens back up. Ive replaced the tensioner 3 times, belt twice, and both idler and tensioner pulleys. Ive also had the balance shafts removed, could that have something to do with it?