Well Im doing a cam seal replacement and the progress was good till I inadvertently rotated the crank pulley counter -clockwise.Dont ask me why. I am confident that the camshaft is at TDC as evident from removing the spark plug and checking for compression with my fingers..peeping thru the oil cap opening on the valve cover and noting the positions of the no , one and two lobes. When I mistakenly rotated the crank conterclockwise I heard a few clicking sounds near the crank pulley which I believe is the crank slipping over the teeth of the timing belt. I now need to set the crankshaft at TDC and want to be sure I will do it correctly. First of all on the back plastic plate of the lower cover is a "zero" reference , pretty much in the vertical position. To the left I see 10 and 20. BTDC I think those numbers are. I have an aftermarket pulley/balancer and there is a notch on the edges of the pulley. To achieve TDC should this notch be in alignment with the "0" on the back plastic plate ? Right now the notch is at 20 degrees.