Car Problem Reports

Buick Lucerne Engine Oil Leak From Front Crankshaft Seal

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

Engines Affected: 3.9L V6, 4.6L V8

Average Mileage: 22,299 mi (2,500 mi - 81,000 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, 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, 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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  •  Rookie

    Oil pan gasket replaced twice. Both times dealership put in 5 qts. of oil and then on second one, the tech put in 5 1/2 qts. Apparently he doesn't like to look up the correct amount(4 qts.). Now, again a leak and they say coming from front crankshaft seal. Still under warranty and I like this car, but this is getting ridiculous.

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  • Visitor, , 3.9L V6, 10,000 mi

    oil leaking from engine took to dealer twice..replaced oil pan gasket..oil drian plug still leaking oil

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  • Visitor, , 4.6L V8, 81,000 mi

    rear engine oil seal is leaking badly i just bought the car a week ago...

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  • Visitor, , 3.9L V6

    Timing belt cover leaked at 4000 miles and has been replaced 4 times total. Oil pan gasket at around 7000 miles head gasket leak(both) at around 15000 miles Retained attorney

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