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Message: <blockquote data-quote="selespeed" data-source="post: 8484" data-attributes="member: 1388"><p>hi all experts out there; i had a reconditioned A/C compressor Sanden SD-507 replaced last week but there's a lot of noise during idling. it sounds like it is metals hitting each other hitting "tok tok tok" like rattling in resonance. the noise disappears when i revved up. i went back to the A/C specialist but they still could not solve the problem however they twist, turn the pipes to try to solve the noise. finally i think it may be due to the compressor pistons being noisy and perhaps the noise is just "deadened" when i revv up. what do you guys think? the noise is extremely irritating during idling and even at 1000 rpm. thanks all!</p></blockquote><p></p>