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Old 12-15-2007, 09:08 AM
UncleJ UncleJ is offline
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Location: Silicon Valley
Join Date: May 2006
Posts: 6,596
Mein Auto: '09 Cayenne "S"
Judy, it "might" be the belt tensioner after all. When you turn on the A/C more load is put on the belt to turn the compressor and that could cause the bearings in the tensioner to howl a bit. I had a similar problem on a Tahoe and changing the tensioner fixed it. I also don't understand waiting until the warranty expires. Right now, under the original warranty, it should be fixed at no cost to you. Why wait?

Last edited by UncleJ; 12-15-2007 at 09:12 AM.
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