Car Problem Reports

Buick Lucerne Engine Oil Leak From Front Crankshaft Seal

Buick Lucerne Problem
24 Reports
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Model Years Affected: 2006, 2007, 2009, 2010, 2011

Engines Affected: 3.8L V6, 3.9L V6, 4.6L V8

Average Mileage: 34,567 mi (4,000 mi - 90,000 mi)


An engine oil leak may develop from the front crankshaft seal. Our technicians tell us a revised front crankshaft seal is available to correct this concern.

  • Visitor, , 3.9L V6, 6,400 mi

    Oil leak between the front two wheels. Dealer replaced oil pan & gasket asm plus drain plug. Leaked again 1000 miles later - replaced drain plug again. Leaking again at 10,000 miles -- will take back to dealer. "Jerry" service manager says Buick has a problem with this engine. . . now it is my problem. . .going to take this to the next level.

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  • Visitor, , 3.9L V6, 14,000 mi

    leaks since 8500 miles has been in to dealer now 7 times for the same problem, have
    replaced all gaskets , oil pan etc. I think the car is a lemon

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  • Visitor, , 4.6L V8, 90,000 mi

    leaking around front crankshaft seal Haven't fixed yet leaking around oil filter housing have fixed it leaking around oil sending switch have fixed that also leaking around water pump replaced water pump now leaking around radiator cant tell where its coming from will not buy another American car again and steill owe 7 thousand

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  • Visitor, , 3.9L V6, 24,880 mi

    I purchased my used Lucerne Sept. 2013. After a 20 mile test drive to a friends auto repair store, we put it on the Hoist. I then reported back to the dealer that the car he was trying to sell me had a major oil leak, that the underside of the motor was covered with oil and that it was probably the front Crank seal. THAT made him jump. I ended up buying the car. The dealer repaired the problem under warranty, acted honorably and I ended up with a discount of $3k off their asking price and a beautiful navy blue luxury car for cheap.

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  • Visitor, , 4.6L V8, 63,089 mi

    Low oil indicator came on and said to shut off engine. Put in 1 quart of oil and happened again later. A Dye was put in oil and found oil pan leaking and Main Oils Seal, this is a dealer fix and I believe is the crankshaft seal. Have not gotten estimate yet but am expecting it to be expensive.

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  • Visitor, , 3.9L V6, 5,988 mi

    Front crank seal leaking oil...dripping on garage floor....seal replace by Buick dealer...part# 14090906...
    on 08 Jan 2011..

    Oil still leaking ....3-10-2014....Mileage...7816...'

    another trip scheduled to dealer for 3-11-2014.....

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  • Visitor, , 3.9L V6, 6,000 mi

    oil leaks, has been taken in to correct 3 times
    dealer cannot seem to correct the problem

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  • Visitor, , 3.9L V6, 84,400 mi

    I had my oil changed and the tech reported that I had an oil leak coming from my front crank seal. It has not been repaired yet.

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  • Visitor, , 4.6L V8

    Dealer just replaced crank seal at 74,000 mi. Also replaced leaking water pump. All under power train warranty.

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  • rjwren, , 3.9L V6, 50,000 mi

    use oil 1Qt EVERY 1,000 miles sed it meets Buicks SPEC.

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