[woodsman]

Is it possible to have someone with the right lever(!) to turn over the engine by hand while you listened??? Check compression. I wonder if you installed the exhaust after removing the serpentine belt and then used a stethoscope to pinpoint the area? Before doing that, check the oil filter, including cutting it apart. Remove IMSB and inspect. Seek pro-Porsche tech and pay 'em what he's worth.