how hard is it to change the alternator on the 2.5 i think i migth have to be changing my alternator soon. cause the battery ligth comes on above 5,000 rpm and the battery doesnt seem to be dying out. it shows 14 volts from idle to 5,000 rpm and 13 volts above 5,000 rpm. is there any special procedure for changing the alternator that i should knwo about, and how much does one usualy go for?