Got knocking noise from air con. compressor when engine running. Took belt off to see if pulley would still turn which it turn fine but didn't hear much after turn pulley by hand. Help!

Asked by Mar 06, 2016 at 02:17 PM about the 2005 Dodge Ram 1500 SLT SB

Question type: Maintenance & Repair

Air con compressor knocking noise

1 Answer

37,965

Take the belt off and start it to see if the noise is still there. Like tennisshoes says, may be the bearing under load.

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