rodgerlstewart

Whenever I start my 94 RX7 I hear a squeaking from under the hood, I am guessing it is the serpentine belt. Does this mean it needs replacement or just adjustment.

misterstyx69

iTrader: (142)

until you isolate the noise you guess is as good as what anyone else is going to tell you.

Sgtblue

iTrader: (16)

It could simply be that one is simply loose or worn. But before tightening or replacing, post a picture of your engine bay showing the belts.

Rotary-omega

Could be loose. That's the first thing I would check.

Sgtblue

iTrader: (16)

No pictures from the OP yet. But installation of under-drive pulleys and removal of the air-pump results in very little belt contact with the water-pump pulley. This often causes slipping and noise. The tendency is to over-tighten the belt and that can cause other problems....premature belt wear and worst-case...accelerated front bearing wear on the engine (see below)