Noticed oil all around oil pan, but not the whole pan, just side/corner, but enough to see the bolts completely glazed in it. I thought it was the pan, but I noticed oil stains above the oil pan flange, AND I noticed the drivebelt(s) and the crank pulley (I think it was the crank pulley) having a nice layer of oil over it. So...I think I have a leaking front main seal. Anyone replaced one of these of a 1nzfe? I have not replaced a main seal (front or rear for that matter, but 'happy' its front), so I wanted to ask anyone who has done it on this or a similar car. Anything I need to be aware of, etc? I'm pretty confident I can do it, I just like to get info on repair procedures before I do it. Thanks. 2001 Echo.