Just take out the 3 or 4 lower cam cover bolts one at a time, clean the bolt meticulously as well as the threads in the head, goober the threads from the head to halfway down the bolt with gasket maker (permatex red works) and reinstall using the proper torque. I did this and while I still get a tiny weep, the leak has almost gone away.
There are also new spec micro-encapsulated bolts that you might want to try.
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Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
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