I'm sorry for re-activating this old thread, but I also need to replace the alternator now.
You said that just unscrewing it will do the trick. Alldata instructions mention that the tensioner has to be relaxed first with a long lever, and the engine belt should be pulled from the alternator's pulley.
Now... I don't have that fancy long lever that they have pictured in the instructions. Hence the question: can I get away w/o relaxing the tensioner and removing the belt first? And if not, where can I find the lever?
Thanks!