I have a 2002 SE 4 cyl. manual with A/C. I've had a chirping sound coming from my engine (sounds like a small bird). We replaced the two tensions. We thought it was the alternator, and after we replaced the alternator, the chirp initially went away. But after driving for 10 minutes it came back. I noticed it was gone this morning when I started for work, but had returned by the time I got there. Is the engine god messing with me? I'm wondering if could have something to do with the fan belt heating up. The belt looks fine, but it has 55,000 miles on it. I'd appreciate your thoughts.