Seville SLS

Oil Leak From Lower Engine Area on Cadillac Seville SLS

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: 100,790 (30,800–214,000)
11 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003, 2004
49 people reported this problem
Viewing 1 - 19 of 19 comments
Always having to add oil even about a month after oil change. I know Northstar engines burn oil, but then I noticed underneath of car was wet with oil. (never dripped on driveway until recently). The mechanic changed a bolt or nut that goes under there, but it continued. Mechanic says that I probably have an oil pan gasket leak and that is major work to fix. Tells me to get a new car, but I can't afford one right now.
its a minor leak therefore I haven't invested in a repair yet. The car has only 87000 miles at this particular time.
Cadillac dealer quoted me 5000 dollars leaking from lower case. Engine must be removed.
It has not been fixed, I do not know the cost to fix it, but Raben told me the rear main seal has developed an oil leak, and I want the issue fixed and I want an idea on the cost to fix the problem.

The cost at the Cadillac dealer: $2000. It's a 14 hour job and the engine and transmission must be separated to access the rear main seal. Also the A/c just failed after being recharged. That brings the total to $3000 of repairs.

Dear GM, The northstar engine was supposed to be the next best thing to sliced bread, but it is a piece of crap at 99000 miles. You have just lost a customer and we replaced the SLS with a new Hyundai Sonata Limited. Build better cars GM.
Still leaks. Cheaper to keep adding oil. $3,000.00 to fix. Must pull engine.
oil leak, smells hot but temp is fine, smokes barrels from under the hood and from the backside
Oil Leak From Lower Engine Area on Cadillac Seville SLS
Not fixed, too expensive to do now. Have to have engine pulled and new gasket. Small leak just keeping an eye on oil level keeping it topped out.
I have to park on card board all the time and don't really need an oil change because I am always putting oil in the car.
rear main seal is leaking oil
Engine must be removed this is done by engine and transmission coming out the bottom. The car is raised up and sliding the assembly out from under the vehicle. Repair can now begin. I have chosen to just keep adding oil. Cost of repair too much.
diagnosed as gasket problem removed engine to repair.
leak 2-3 qts. of oil between changes.
Smells like burning oil from time to time
B bank sensor error code p0385 car stumbles and code sets i/m light turns on.
norstar engines still leaks after spending $1000 on repairs need new engine
Have not had the repair done yet. will follow with the information.
Oil leak somewhere in the lower part of my engine