Hello, I'm replacing a timing belt on a Nissan Maxima 1993. I removed the camshaft sprockets and re-alligned one that I don't know why was off (maybe I twisted something while removing the rocker arms?) Now I see that the mark on the crankshaft sprocket is not alligned with the mark on the oil pump housing. What I have to do? Seems impossible to me that I turned the crankshaft and modified the position. Could be that was not alligned even with the belt before? Thank you for the possible answer.