WHY DOES MY 'S AC MAKE SO MUCH NOISE, AND THEN THE NOISE DISAPPEARS WHEN THE CLUTCH IS PRESSED IN?

2009 Kia Spectra

Tiny

SamJ

May, 1, 2012 AT 2:35 PM

When I purchased my Kia it was in the winter in the Northwest, I didn't even thing of checking the AC. When it got hot out, and I used the AC for the first time, I noticed that it made a considerable amount of noise (rhythmic, not screeching, almost like a belt is hitting something?). The noise goes almost completely away when I press in the clutch. When I turn the AC off the clutch also feels looser. I don't understand why the clutch and AC affect each other so much. What could be causing the noise, and why does clutch make such a difference?

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Tiny

KHLow2008

May, 1, 2012 AT 3:21 PM

That could be due to movement of the crankshaft due to excessive clearance of the crankshaft thrust bearings.

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