AC problems with compressor

Tiny
ZP
  • MEMBER
  • 1992 MAZDA 323
  • 170 MILES
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
Wednesday, September 14th, 2011 AT 1:38 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Check all the mounting brackets. Might be loose or may have broken belts allowing it to vibrate.

Roy
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Wednesday, September 14th, 2011 AT 3:22 PM
Tiny
ZP
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  • 4 POSTS
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
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Wednesday, September 14th, 2011 AT 5:47 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
A bad harmonic damper on the crank pulley would be the most likely cause if it is screeching noises.
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Wednesday, September 14th, 2011 AT 5:53 PM
Tiny
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  • 4 POSTS
Hi its not aq screeching noise its like clicking like something
catching on something

zoe
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Wednesday, September 14th, 2011 AT 6:15 PM
Tiny
KHLOW2008
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  • 41,814 POSTS
Check if the crank pulley seems wavy when engine is running. A bad harmonic damper can result in clicking noise as well.
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Wednesday, September 14th, 2011 AT 6:23 PM
Tiny
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  • 4 POSTS
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
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Wednesday, September 14th, 2011 AT 6:30 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If 3 different compressors have the same symptoms, it would be hard to swallow. Keep us updated.
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Wednesday, September 14th, 2011 AT 6:39 PM

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