For the hell of it, since I had to pull the crank pulley to replace the timing belt / water pump anyway, I put on a UR Crank Pulley. I am 100% positive all the belts are on correct (balancer belt in particular). I noticed IMMEDIATELY upon startup the engine does NOT run smooth like it used to. It is like one of the balancer shafts is out of whack but I am sure it's aligned the same way it was when I took it off. Any ideas what's going on here?... does the pulley make that much of a difference!? Did those of you with UR Crank Pulleys experience something similar? Help I don't want to ruin my engine... that was a pain to install too...