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I know I am reviving an old one! But my car has been chirping pretty bad recently, changed the belt about a month ago and the chirp went away for about 300 miles then it came back. I tried the soap bar method and the chirp went away for about 10 minutes then it came back even worse than before, only not at idle now. Does this mean a lubrication issue for sure? And in trying to diagnose what does this rule out? Thank you!!