On the O.E.M broken damper it had a 0 to show where T.D.C. is I threw it away.On the BHJ damper it has only lines on it. I know how to put your finger on number 1 cylinder to feel the air pressure come up,but it won't get me on T.D.C. Which line on the BHJ is top dead center? I do have a pointer.Thanks,JDC