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Old 02-07-2013, 12:08 PM
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thekurgan thekurgan is offline
Bad Lieutenant
Location: Sacramento, CA
Join Date: Jul 2007
Posts: 6,178
Mein Auto: S65B40 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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