Turbo whine in humid weather - Saab 9-5 Bulletin Board - Saabnet.com
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Turbo whine in humid weather
Posted by John Lindstrom (more from John Lindstrom) on Fri, 8 Sep 2006 08:25:49
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Hi, have a 2001, 9-5 Aero, just turned 60,000 miles and I've had the 60K service. Here's the issue: over the last month, in humid weather, I notice a different sounding whine from the turbo, something like a little lower growl. Everything checks ok, car seems to be running fine (no rise in temp gauge, turbo seems to react well). If the weather warms and dries up, or the car's been running awhile the whine resolves itself into the normal turbo sound. If I didn't know better I'd say it almost sounds like a belt slipping. I'm wondering if there are filters that perhaps need cleaning or replacing. I'm in Michigan and autumn is definitely a humid time, so I'd like an opinion on what this might be.
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