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Old 12-03-2007, 04:11 PM   #1
FrayAdjacent
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Join Date: Dec 2006
Location: Austin, TX
Posts: 939
A little rumble right at 3k RPM

I noticed a bit of a vibration or rumble earlier this year when the engine hits about 3kRPM. It seemed to only happen when the AC was on, under light load. Now it's happening a bit without the AC on, like when I'm cruising on the freeway.

I figure I should replace the main belt, since I just turned 50k miles... Would everyone agree that might could be the cause? Any other ideas?
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2001 Boxster - Grey on Grey
1969 911T Targa - 'Stinky'

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