Ive noticed that i get a loud squealing that sounds like its coming from the firewall. Its not constant and only happens after the cars been warmed up and driving for awhile. I noticed this driving my girlfriend to work about 35 miles one day and ever since then it seems to be getting louder everyday.

Its seems to start after prolonged periods of driving in 5th gear on the highway but im not sure that has anything to do with it. Its not coming from the belts because it remains constant speed, even when revving up the rpms it just is a continuous whine at the same pace.

It comes and goes as im driving but its becoming louder and staying around longer lately and i just wanna find out what it can be. I just bought the car and it has a new timing belt >5k miles, new belts for everything else, a/c delete, power steering removed so that takes care of everything i would normally think the problem is. The only other thing i could imagine it being is the heater fan but the noise is their whether the heat is on or not at the exact same pace.

Any help would be greatly appreciated as im losing my mind trying to figure out what this could be.