I took a part the oil pump to clean it because it was old and had some oil sludge in it. I got a new gasket to put it back together and noticed there are dots on the top of the rotor and on the case. Does this need to be lined up a certain way before putting it back together? I haven't seen anything on this before and was curious.
If I need to I'll take pics when I get home from work to show what I mean.