how do you know if timing chain/belt is bad and does it make noises?

1988 CHEVROLET BERETTA
240,000 MILES
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BARRY724
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i have a chirping sound and it seems my serpentine belt is crack free and tight enough but a chirping sound is coming from the alternator and pulley areas around the front of motor.this sound seems to occur after car has been running for a while.i do have a good mechanic but i want to know if it could be the timing chain which i pray it isn't.i believe loudest part of chirp is near the alternator.it has been replaced 5 years ago.i will check for a wobbling pulley otherwise i am clueless.
Apr 7, 2012 at 4:24 PM
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RASMATAZ
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Could be the alternator bearing failing-start here
Apr 7, 2012 at 4:26 PM