My Playsation 2 sounds like crap

[Mike]

I have a Playstation 2 and I installed an external mod chip that works great. The problem is that my Playstation sounds like its making this screeching sound when I play my copied games. Is it me or is this thing making the same noise as others that have done modifications to there Playstation.
Does modifying the Playstation shorten the life of the Playstation ?

Thanks Michael