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Loud rattle/squeak when AC turned on

Old 06-05-2019, 06:36 AM
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Default Loud rattle/squeak when AC turned on

Hey all,

i have ave a super loud rattle/squeak that starts whenever I turn the AC on. It increases frequency with engine RPM so Iím sure itís a pulley or belt (or I suppose it could be the actual AC compressor?, but the AC works fine). Any tips on how to identify the culprit? Itís a PITA to get back to those AC pulleys/belt

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Old 06-05-2019, 06:54 AM
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I would spray behind the ac compressor pulley while it's running with something like bg penetrating oil. Easy to get to.
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Old 06-05-2019, 08:32 PM
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Take the belt off and spin each pulley by hand. If you donít hear anything obvious then the tensioner is likely worn out.
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