Lifted the hood on my 97R wagon and heard this bird chirping sound coming from what sounded like the alternator/A/C pump area or, the valve cover. Couldn't tell. The sound is like a bird sitting on your shoulder chirping in your ear. If you increase the rpm's it increases. Sounds like something related to the engine. Is this serious? The engine has Castrol's 10/30 synthetic in it. I first noticed the sound about two or three weeks ago, and it seems to be becoming more pronounced as time passes. Any ideas appreciated. Dick
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