ac problems with compressor

1992 MAZDA 323
170 MILES
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ZP
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the ac makes a terrible noise when the engine is on but when accelerating it is ok we have changed the compressor 3 times and still the same noise.

any help would be appreciated thank soe
Sep 14, 2011 at 6:38 AM
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ASEMASTER6371
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check all the mounting brackets. might be loose or may have broken belts allowing it to vibrate.

Roy
Sep 14, 2011 at 8:22 AM
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ZP
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thanks for the advice but the garage has changed the compressor 3 times because of this noise but they are second hand compressors
if they have been in there that many times wouldnt they have seen any
broken belts or loose brackets. Is there anthing else that could do this. thanks zoe
Sep 14, 2011 at 10:47 AM
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KHLOW2008
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A bad harmonic damper on the crank pulley would be the most likely cause if it is screeching noises.
Sep 14, 2011 at 10:53 AM
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ZP
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hi its not aq screeching noise its like clicking like something
catching on something

zoe
Sep 14, 2011 at 11:15 AM
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KHLOW2008
  • ✓Experienced Mechanic
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Check if the crank pulley seems wavy when engine is running. A bad harmonic damper can result in clicking noise as well.
Sep 14, 2011 at 11:23 AM
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ZP
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ok will look because i dont think the problem is the compressor having changed it 3 times but the garage here thinks itis.cant have 3 with the same problem so will check out what you say tomorrow.

thanks zoe lucky to get anyone here who knows what they are doing

Sep 14, 2011 at 11:30 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
If 3 different compressors have the same symptoms, it would be hard to swallow. Keep us updated.
Sep 14, 2011 at 11:39 AM
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