626 mazda A/c under hood noise

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3,463
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Coastal South Carolina
8 yr old mazda 626 75k miles around town miles - when air cond is off under hood noise from compressor area is louder, turn a/c on and noise becomes less- noise sounds mechanical its not belt squeal. thoughts? why quieter when a/c is turned ON?
 

JHZR2

Staff member
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46,303
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New Jersey
Compressor clutch issue? Maybe there is a misalignment so the bearings chatter more - load them a bit and they all fall in line?
 
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beaver land EH?
sorry, you'll have to find some ways/means to upload the sound (yotoob?). Without that,we are just playing guessing game (and so many things under the hood can be at fault). Q.
 

edwardh1

Thread starter
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3,463
Location
Coastal South Carolina
Originally Posted By: Quest
sorry, you'll have to find some ways/means to upload the sound (yotoob?). Without that,we are just playing guessing game (and so many things under the hood can be at fault). Q.
true, my friend had the power steering pump replaced and that helped a lot but the noise now still gets quieter when you turn on the a/c. based on that I told him its probably not the compressor, since it would howl when on. the mechanic told him he needed a new compressor. maybe its the clutch and they cant buy the clutch seperate?
 
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