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Engine Oil Leaks on Porsche 911

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 66,475 (37,900–113,000)
Engines affected: 3.6L 6 Cylinder, 6 Cylinder
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998
14 people reported this problem
Comments
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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.