1. syempre yung timing belt;
2. water pump, kasi halos katabi na rin ito ng timing belt. para isang bukasan na lang and tipid sa labor.
3. tensioner bearing. same reason as item 2.
whilte you are at it, consider replacing the following items too kung hindi pa nagagawa..
1. alternator belt
2. aircon belt
3. engine support left side (kung hindi pa sira).