I just got my timing belt and accessory belt replaced.

Before I got them replaced, my car was making a squeaking noise from the left side of the engine bay and I thought it was the accessory belt.

However, the noise is still there for some reason and its driving me crazy!!!!!!!

What could be causing the noise??

 

When you say left side is that when you are looking under the hood?
Drivers side or passenger side?

 

it was the passenger side

the noise becomes more frequent as i rev

 

It could be a bad bearing in the Alternator or A/C compressor.
Best way to find out is to remove the accessory belt and spin the pulleys and listen for the noise.

 

I found the source of a squeaking noise that I had for a LONG time: The glove compartment handle.

 

This works good for pin-pointing noises.....Take a wooden handle from something..place one end on car part/power steering pump/alt/valve cover......the other end on your ear.....good way to pin-point things....just be careful of moving parts.

 

i agree with tech.. remove the belts and go ahead and start your car. if the squeak goes away then you know it has to be a belt or something driven by the belt. then check for play in the bearings of different components if the noise does go away. or a bad bearing noise, you may not have play in it just yet.