benz_addict

Really loud squeaking sound, happens during cold starts and fades away after normal operating temperature, well most of it.

Listen to the car as it rolls down the driveway (not my car). But I have the same problem.

http://www.youtube.com/watch?v=nMwsGwfk9iY

S-BOPOH

Have you done any engine upgrades, pulleys, belts etc?

SSIIICK

Malfunctioning pulley?

AMS Performance

Sounds like your idler pulley make be about to give. It could be a worn belt as well if you have over 40k miles on the belt, but usually belt isn't that loud. When the idler pulley bearing gives it can make some pretty nasty noises. Buy a can of serpentine belt conditioner and lightly spray it on the belt as its running at idle (on both sides) don't coat too much. See if the noise goes away, if it does that means its the belt, If not then its most likely idler pulley.

benz_addict

My car is pure stock. Both belts seem to be very tight and have aggressive teeth marks still left. I will try the belt dressing and report back when possible. Thanks for the answers.

Open for more possible solutions and answers of course.

AMS Performance

How many miles are on the car (most likely still original belt)?

benz_addict

It's got 100k miles...

AMS Performance

ya replace the belt. You can use belt conditioner and it may get you another 5-10k miles if you are lucky, but eventually it will fail. Its cheap, belt is like $35-45 with an hour of labor roughly. Not a big deal.