You need to get a good eye back there. Things that can leak in that area: VTC exhaust valve covers "half-moon" plugs PCV valves/hoses Turbos Usually the RTV that goes on the VTC under the intake valve covers can leak, or the rubber "half-moon" plugs on the exhaust valve covers are suspect. If it's the half-moons, you can replace them with nice aluminum ones that won't "shrink" made by BDE. Exhaust valve covers are a *bitch*, if you have the EGR still. Also check your PCVs, I know when I changed mine I realized THAT was what put oil onto my PS O2 sensor (ruining it).
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