Ok so I bought a new idler pulley from 5.0 resto since my other one was pretty worn. For some reason no matter how tight I make the idler pulley bolt there is still play in the pulley. It's not a huge amount but I know there is not supposed to be any at all. I'm using the stock bolt and I have the spacer(looks like a gear), in there also. Am I missing a washer or something? I'm not sure what could be causing this. Thanks.