I m about to replace my alternator, know i m wondering should i replace belt tensioner and idler pulley as well please help with some info.My automatic belt tensionar does makes little sound when i spin it with a hand but when i try to relase tension it works perfect goes back in place right a away, idler pulley no noise.

 

Yes, I would recommend it. I had replaced my alternator last year about this time and did replace the tensioner at that time and ended up replacing the idler pulley two weeks latter.

Now would also be a good time to replace the belt if it is over a year or two old.

 

If you have money burning a hole in your pocket, by all means put in HIGH quality new ones. don't be cheap with Zone and other low cost parts stores since most of their low cost parts are Chineese made.

if you feel they are fine, then why not use them? I would