I work at a honda dealership and I asked on of the other mechanics if you could make a alt belt to tight and yes it is possiable but not likely. Get the new belt on and use a crowbar wedge it between the head and the alt push the alt out untill the belt is nice and tight and then tighten the nut. Runn it if it doesn't squeel it is good. That is how I did mine and it has been fine for 20,000 miles