I ordered both belts for my 2004 XJR, including updated tensioner and idler pulley. Any advice before I tear into replacing the belts and pulleys? Any thing to look for while I am there? Any special tools required?

While I was at it I also ordered a new expansion tank, just to be safe. Haven't had a problem yet, but it seems they are weak and I want to avoid having in break in the middle of nowhere!

Thanks