I hope it's the oil filter O-ring but that's very unlikely. It's more than likely the O-rings inside the variocam adjusters and there's no way to replace them. The same thing happened to my 37,000 3.4 after I installed it in my boxster. It's a common problem on very low mile motors that don't get used enough. New adjusters are stupid expensive. I went with used adjusters and lifters. My lifters went flat too.
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Woody
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