Car Problem Reports

Pontiac G6 Oil Leak From Front Crankshaft Seal

Pontiac G6 Problem
28 Reports
Me Too

Model Years Affected: 2006, 2007, 2008, 2009, 2010

Engines Affected: 3.5L V6, 3.6L V6, 3.9L V6

Average Mileage: 71,143 mi (28,900 mi - 140,000 mi)


Vehicles with a 3.5L or 3.9L V6 engine may develop an engine oil leak from the front crankshaft seal. Our technicians tell us a revised front crankshaft seal is available to correct this concern.

  • Visitor, , 3.9L V6, 60,000 mi

    Small leak, no perceptible oil under the car, or out the exhaust. As noted, advised on routine oil change. A local Chevrolet dealer, (no Pontiac, right?)- relplaced the oil sensor-wasted $150 beans. My son has the same engine, and has lost a quart every 1m miles-47m now, and problem has existed since 30m, and multiple trips to the original dealer. I plan to take the info obtained from this site, (thx), and, finally, get this fixed-will advise results....

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  • brendon04, , 3.5L V6, 140,000 mi

    oil leaking. have add a qt and half evey week

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  • Visitor, , 3.5L V6

    Diagnosed during a routine oil change at the dealership.

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  • Visitor, , 3.9L V6, 77,043 mi

    found engine 2 quarts low, degreased engine and appears oil is leaking from the pulley seal. Not fixed yet.

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  • Visitor, , 85,000 mi

    Blew the engine

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  • Visitor, , 3.9L V6, 33,000 mi

    1 quart of oil every 2000 miles

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  • Visitor, , 3.9L V6, 130,000 mi

    I have burned oil since 78k miles. But dealership advised It was not enough to be fixed under my warranty. Not today I noticed oil on my driveway. So I went to get an estimate and I need rear main seal set, crankshaft oil seal, timing cover gasket and oil filter adapter gasket so I am being told. This car is junk !

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  • Visitor, , 3.9L V6, 58,000 mi

    Multiple engine leaks, not fixing...will trade in car for a reliable Toyota.

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  • Visitor, , 3.5L V6, 71,110 mi

    Problem has not been fixed. First took the car in and they replaced the front seal and the right cyclinder head seal. Still leaks oil. Took it back and they replaced the oil pan gasket. In less than two weeks the oil is leaking in the same way as before. I bet they did not used the revised seal.

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  • Visitor, , 3.5L V6, 48,000 mi

    Same leak on my g6 convertible hard top.
    I have an Impala with 100,000+ and not a drip!

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