I had the same question there are some excellent videos on YouTube by a guy doing the timing belt and the problem he encountered with one of the pulleys being off one tooth. I definitely recommend you look at these before tackling this job. Job requires some special tools so give your local shop a call and see how much it costs in your area. The expertise level is above average and is on the technical side. 4.5 out of 5 stars in difficulty. while your in there I would replace everything else that is there usually the water pump and thermostat check all other pieces for wear and damage replace if any doubt arises. It is not worth tearing down the engine again to save a few bucks.