timing belt, it is probably an additional 10 minutes. a professional mechanic should be able to do that in 5 minutes extra. really. it is nothing. like 6-8 bolts, pull the pump off, put the new o ring on, put the pump on, put the bolts back in. i, personally, feel that every timing belt change should include that o ring, after what i went through. at least every other timing belt change. you are changing them at the 60k mile spec, right? 