how do you remove the alternator? There is very little room in the engine compartment. is there an idle pully that needs to be loosened before removing the belt?
It would help to know what year and engine size in liters.
Get yourself a manual! Changing an alternator should be simple enough, but in these days of cramped engine compartments, you very often have to remove other components for clearance purposes. Even though changing an alternator is pretty much a no-brainer, sometimes removing the component for clearance can be a tricky job best left to the experts!