1998 Toyota Corolla Vibrartion on idle when air cooler is o

1998 TOYOTA COROLLA
120,000 MILES • V12 • 2WD • AUTOMATIC
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SAROAR
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After running for about 1 hour with A/C ON, the car creates huge vibration when it stays idle on brake. Sometimes, engine stops with knocking. If A/C is off then the problem does not appear.
Jul 8, 2009 at 6:22 AM
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MMPRINCE4000
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Most likely the AC clutch is bad or the AC compressor bearing. In most cases the AC clutch can be changed, but if a bearing the compressor would have to be changed.
Jul 9, 2009 at 2:55 AM
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SAROAR
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[quote:6a788ef2cb="mmprince4000"]Most likely the AC clutch is bad or the AC compressor bearing. In most cases the AC clutch can be changed, but if a bearing the compressor would have to be changed.[/quote:6a788ef2cb]

Thanks for your response.

I like to add more on this problem. The vibration problem starts earlier if the steering is fully turned on brake.
Jul 9, 2009 at 6:05 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
It sounds like the serpentine belt is being stressed by the AC clutch/bearing.

The fact that it only does it when AC is commanded, points directly to the AC compressor.
Jul 10, 2009 at 2:22 AM
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