Thread: low scratchy noise from engine at idle speed.
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Old 04-01-2014, 04:29 PM
Ferdman Ferdman is offline
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Join Date: Aug 2002
Location: Southeastern PA
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Zulfigar, even though you unplugged the air pump a dry/worn bearing would still make noise when it was turning due to the belt tension. So the air pump could be the source of the noise. You would need to temporarily install a shorter belt, omitting the air pump, to rule it out as the source of the noise.
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