hey im having trouble retightening the screw at the bottom of my forks. I just changed my fork oil and fork oil seals. when reassembling everything the right drain bolt tightened up easily but the left one screws in gets tension and then continues to spin. I disassembled everything to see if the internal threads were stripped and they aren't. im really confused as to how this system creates the pressure to actually get tight. please help. I hope this makes sense.