Hey all- I'm in the middle of replacing the LIM gasket, and noticed that the balance shaft has some end play in it. I can easily move it along its axis- how much end play is this thing supposed to have? And is it a hard fix?

I think that might be the cause of a sort of rattling noise I've been hearing. I thought it was the supercharger coupler, but that was prisine. I changed it anyway since I had the part.