schn0354--
The crank pulley is actually two seperate pieces. There is a small rubber ring that sits between the two. People have had problems in the past where this rubber has deteriorated and caused the piece to come out of balance and create a noticeable wobble. If it's really bad you should see a wobble happening while the engine is running (though it's kind of hard to see where it sits way down low on the passenger side of the engine compartment.) I had actually replaced this with a piece I got from a junkyard for about $50.
The work to do it pretty simple if you're comfortable doing your own repairs. You can easily access it through the passenger side wheel well (just jack the car up, take off the passenger side tire for easy access, and take off that plastic splash guard and it's right there.). I think the hardest part for me was breaking the bolt loose that connects the crank pulley. After that you just loosen the belt by dropping the alternator and you can do what you want with it. Tightening it is a bit tricky since it naturally wants to spin. I think there are pulley puller tool kits out there that might help with that problem, but I didn't have one when I was working on it.
However, just note that I replaced this already and I still have the vibration problem. I've just learned to live with it, or until I get a weekend to play with trying to get that egr valve out (so far I'm content with just living with it
). People seem to have had success in masking the vibration a little by just raising their idle speed a little bit (I think spec is around 750 +/- 50 rpm and they're going to about 800-850 rpm).
