Strange sound after tightening belts

[Kingtal0n]

to reiterate

check how all accessories feel like by hand
turn them off 1 by one to see which one is making the noise
theres a chance an accessory is about to fail


inspect belt visually and by touch

also
never overtighten a belt
Its worse to over than under. I always leave them a little loose them tighten if necessary.
and I recommend
always carry spare belts and other consumables like fuel pump and spark plugs, a spare coil pack, spare igniter maybe
and when it comes to s13 sr20det engines always keep a spare power steering and alternator handy minimum