Time for valve stem seals... 2005, 4.4i, 113,000 miles
Very interesting about upside down keepers. It should have been very obvious like in the video if the valve stuck out a long way past the spring.
If you took photos you can verify or use the fiber optic camera on the right side through the oil fill.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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