In general, I've found that any engine noise I really need to worry about makes itself known to me quickly and loudly. Make sure your oil level is correct and belts tensioned properly. Beyond that, any minor taps and clicks are best ignored, it's easy to get obsessed about them.
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Paul B. Anders / Phoenix, AZ
1970 Porsche 914 / 2003 Porsche Boxster / 2009 Honda Fit Sport Auto
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