I had the 90K service done and also had the dealer change the timing belt. Ever since the replacement, engine is not as mooth as it was prior to the timing belt replacement. When I first start, it revs at about 1100rpm. After driving a little bit goes down to 500 rpm. I don't recall what it was before. And I am hearing this sound, which only way to describe is as if something is rubbing inside. I am planning to go back to the dealer but wondering if any one has any insight they would like to share.