Over time, the engine can leak oil at various locations. Early-production vehicles require engine disassembly and modification to resolve leaks at the cylinder heads, oil return tubes, valve covers, timing cover, chain housings, case through bolts, and lines to/from the oil cooler.
Engine Oil Leaks on Porsche 911
Average mileage: 76,000 (50,000–113,000)
Engines affected: 3.6L 6 Cylinder, 6 Cylinder
13 people reported this problem
2 people shared problem details
1995 Porsche 91165,000Visitor
Engine smoking at idle from driver side. Then, oil puddle found under car after winter storage. Upper valve seals need replacing. Done at dealer. Mid- price fix. Around $1000.
Engine oil leaks can occur at the rear main seal and/or intermediate support cover o-ring; a...
Valve cover leaks are common.