Oil Leak From Lower Engine Area on Buick Lucerne

Problem Description and Possible Solution

The engine may develop an oil leak from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.

Problem Data
RepairPal Verified
Average mileage: 88,875 (58,000–157,556)
Engines affected: 3.8L V6, 4.6L V8, V6
4 model years affected: 2006, 2007, 2008, 2010
31 people reported this problem
Viewing 1 - 17 of 17 comments
I notice the oil leaking on my garage floor I cleaned it up a few days later it was back again is this a costly repair.
small oil leak from engine. Aged out of warranty. Repair tech tells me "oil is cheap!", meaning that I don't want to spend the money it would cost to repair the problem.
Very irritated with Buick, especially since this engine has been around for years.
Not yet fixed.
Purchased used in 2012 @ 66000 miles. Now at 106000mi I noticed light smoke from under the hood. Noticed a pin hole leak (coolant) in one of the hoses leading into the engine. Took it to shop for repair, mechanic noticed oil leaking from rear main real. Also in addition to pin hole coolant leak the water pump and lower intake was leaking and the thermostat is bad.

The front engine and top strut engine mounts were needing replacement anyway, but since the rear main seal work will require removing the transmission I am having all 4 mounts replaced (front, rear, trans, top strut) because i have seen many comments about issues with them. Also Tech advised on having oil pan dropped to replace gasket since the transmission will already be out of the way.

All together $4100 with no warranty.
(Included in that price I also got all new tire pressure sensors, Nitrogen Tire fill, tire rotation

Work being done: rear main seal, all engine/trans mounts, water pump, thermostat, lower intake hose, oil pan gasket, oil drain plug and seal, oil/trans/coolant flush
It leaks oil & my check engine light on my machanic said I have small oil leak but from where I don't know
I just found out I had this problem. I am very upset. I was told it could be anywhere from $900 to $2000 to be fixed. I haven't decided what to do yet.
I don't know where the leak is, I just know that I have a smell that is like oil burning on the engine. Looking to see if this is a common problem. I was thinking it may be leaking valve covers. But, like I said, I don't know where the oil is coming from.
split block oil seal leaks and makes a mess wherever I park. I now have 85000 on the car and get an oily smoke smell in the car when I park it. Was told it would cost $4000 to fix, so I am living with it.
Have a small oil leak under the car by the oil pan.have not fix the problem yet but going to try to get it fix.
Oil leak. Must replace oil pan gasket. Cost me $600 including labor & tax. Must also pay for oil change after the replacement.
Small drops of oil on garage floor = diagnosis indicates engine needs to be pulled to repair the leak which involves replacing a seal = $1,800. Advised to drive as is and worry about it when I see a puddle of oil on the floor.
Walker Cadillac/Buick/Gmc said the engine was leaking oil from valve covers, timing case, oil pan, rear main seal. They told us they did not do this kind of work just keep adding oil to it?????? That`s a joke! I even bought the car there.. I asked if the car had any recall`s and told me no.
The upper oil pan seal leaks oil on hard acceleration and when the car is parked on an incline. After driving the vehicle for a bit there is a strong smell of burnt oil in the cab upon stopping. I have taken the car to three mechanics and the lowest quote to fix the problem has been $2000. I check the oil several times between oil changes and never have to add any oil so the leak is not that bad.
Oil leak is small, constant irritation. I have decided to live with it, as others have
done the engine removal/gasket replacement, only to have leak reappear.
crankcase seal needs replacement. Buick says pull engine and repair (likely also do spark plugs and water pump for parts only). Cost $2860.00
my mechanic says they all do that. at least $2500 to fix 24hours of labor to remove engine and trans split motor and replace seal...he says if you're going to fix this best to change all gaskets AC compressor and other acsessories because thats the only way to get at and change those too.
I went in for a tire repair and was told that they found a leak in the crankcase. It was a massive job that took several days to fix. It was very expensive. I was told it was out of warranty. I thought that modern cars were built better now.