Engine Oil Leaks on Porsche 911 Turbo

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 covers, chain housings, case through bolts, and lines to/from the oil cooler.

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Average mileage: (–)
6 model years affected: 1991, 1992, 1993, 1994, more1996, 1997
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