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Old 02-07-2013, 12:08 PM
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thekurgan thekurgan is offline
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Location: Sacramento, CA
Join Date: Jul 2007
Posts: 6,291
Mein Auto: S62B50 Powered
This is a known issue. There was a part change on the cap after '10 I believe. One key thing is to keep the cap rubber ring clean as well as the mating surface. Make sure neither surface is dry, or the rubber will bunch up. You can also gently bend the fasteners to make a tighter seal.

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