I have a problem when adjusting my valve clearance. Basically I got the intake valves low enough to where the feeler guage barely grabs. But after and before I tighten the lock nut up, the rocker arm is loose. I can wiggle it and even hear the play in it when I jiggle it. I also made sure to have the crankshaft set on the TDC mark and i was working off of cylinder 1.Could this mean bent valves? Its a jdm d15b. What could this be, the other valves don't have that much play. Any help appreciated. Thanks in advance