[thstone]

+1 on replacing spark plug tubes. I was sure (and so was my local Porsche dealer and a indie shop) that my oil seepage was coming from the cam covers but after replacing the spark plug tubes the seep disappeared.

Cam cover gaskets can be replaced with the engine in place but its a real PITA so most shops want to drop the engine to make the job easier and to ensure that they do a good job the first time.