Might be my eyes but it seems like my crank pulley wobbles. I just started looking like that after I did a cam timing chain install last weekend. Looking at it from the top it is in line with the water pump pulley and doesn't look like it is wobbling from the top. If you look at it straight on it almost seems as thought he pulley is not round. The fan has no movement to it at all though, neither does the harmonic ballancer. I changed nothing when I put it back together and did everything by the gm service manual (didn't drop the pulley either). The car runs perfect except for this. Any ideas?