what exactly is supposed to be changed. right now i have all belts, water pump, timing belt tensioner and the balance belt tensioner. do i need to change the idler and tensioner pulleys. the car has 53k on it. basically, i have spent over 200 bones on freakin parts and dont want to have spent that much unless it is necessary. if the parts do not look worn, do i need to change them? (mainly referring to the pulley's and the tensioners.) the belts are 13 years old. thanks all!

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