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What is causing an intermittent squealing noise from my 1998 Vauxhall Corsa?

My 1998 Vauxhall Corsa 1.6 petrol has started making an intermittent squealing noise. If I switch the air conditioning on then the noise goes away completely, but when I switch it off the noise comes back but sounds like its slowing down.

Asked on 26 June 2010 by raider

Answered by Honest John
Belts and pulley bearings.
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