Oil Leaks From Lower Engine Area on Cadillac DeVille

The engine may develop oil leaks 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.

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Average mileage: 105,713 (9,400–235,000)
Engines affected: 4.6L V8, 4.9L V8
14 model years affected: 1990, 1993, 1994, 1995, more1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
310 people reported this problem
162 people shared problem details
i leak oil and understand there is a new way to fix w/o taking the engine out.
121 people like thisFlag inappropiate
From the first Northstar engine I brought, 1997 Deville , has cost me 1000's of dollars because of the many problems. The 2005 Deville I also have now also leaks oil and my mother inlaw also has a 2005 DTS that leaks oil. The question is: Who was the dummy that designed and who allows this engine to be put in Cadillac. After all problems you would hope they would fix this problem. But they don't!! I have owned Cadillacs starting with a 1959 though 1990 and never had problems. But now from the time they first install the Northstar engine they have been nothing but junk. I will never buy another Cadillac again. Jerre N. Fischer
48 people like thisFlag inappropiate
It started at 97000, and continues to this time at 157,000 miles. Perhaps a class action would be in order with GMAC. It leaks and leaks, I do not feel its burning, but leaking from bottom of motor, the crankcase I think. Can we do anything or just complain and eat it? Does anyone have any ideas? I now use 3 quarts between oil change, which is cheaper than repairs at this time.
45 people like thisFlag inappropiate
A UPDATE --- I was told by A Cadillac Motor Division Rep, that My 2005 Deville Leaking oil was a normal thing... considering the age and miles, I was stunned by what she told me! I told her it was leakig from "3" diff. areas.. her response was "It's Normal for the age and miles!!! What answers for people that have spent Thousands on these oil Leakers!! SHAME C.M.D.
43 people like thisFlag inappropiate
2002 Cadillac DeVille114,000
i leak oil very bad and i have to put atleast a quart in every 3 days. what could be causing that?
27 people like thisFlag inappropiate
Beautiful Looking car but, NOT the oil spots that the main seals leave on my drive way from my Deville Leaking oil...
25 people like thisFlag inappropiate
2004 Cadillac DeVille155,000
slight oil leak from under engine...three dime-sized spots per night.
23 people like thisFlag inappropiate
Steady drip from oil pan gasket. Quoted over $1,000 repair due to the labor involved. Tried gasket sealer liquid. Waiting to see if it works.
22 people like thisFlag inappropiate
oil leak from lower crankcase seal
18 people like thisFlag inappropiate
2004 Cadillac DeVille126,000
13 people like thisFlag inappropiate
2002 Cadillac DeVille117,000
leaking oil. Have no solution to prob and will not buy another used caddy again, I do love the car but have owned it for 5 years and there is always something going wrong that runs to 3/600.00 each time.
8 people like thisFlag inappropiate
2005 Cadillac DeVille165,000
Oil leaking from bottom of engine since 48,000 miles. Had extended warranty, up to 100K, they would not repair. The dealer has now gone out of business. Can we do a class action against GM? It affects 96 Cads through 2005. Great performing engines, just leaks oil between oil changes.
7 people like thisFlag inappropiate
Has not been fixed. GM refuses to do anything, even though its a design problem. Perhaps a class action would get some response.
7 people like thisFlag inappropiate
lower crankcase oil leak not repaired 4000.00 to repair.
7 people like thisFlag inappropiate
A rather common issue, GM has revised parts/procedures to fix this. Engine doesn't have to be removed, only the transmission.
5 people like thisFlag inappropiate
2002 Cadillac DeVille100,000
oil leak upper to lower crankcase housing seal. a bitch of a job gotta take everything out.
5 people like thisFlag inappropiate
I sympathize with the Thousands of people who bought cadillacs with the renown "northstar" engine! Yes, Indeed, I also owned A great looking Deville - what a "Head turner" it was! A 2005 cadillac with only 70,000 miles on it. I went to Cadillac motor division rep. and my area, told to take to a Certified cadillac dealership to have it put on a hoist and to be told I didn't have One leak, but My northstar engine had "Three" leaks all toll !!! Have been told numerous times that it's a MAJOR job to fix these leakers.... also a very expensive job also...
4 people like thisFlag inappropiate
Woke up this morning... started my cadillac... a whole lot of commotion going on under the hood, so i just leaned my head back... couldn't help but see white smoke in the rear view...choking from the smoke in the garage i backed out and wondered what to do... I Saw oil on the floor and all over the oil pan... I wondered if my baby was driven by another man... I went to mr. cadillac to get my baby some help... He told me to come back monday because so he could take further steps... I was qouted $1500 to get back...it makes me wonder why I bought a cadillac... The sky is falling...and I'm the only one getting wet!!!
4 people like thisFlag inappropiate
2004 Cadillac DeVille118,130
Found a small leak. Had a diagnostic done. Crankcase and rear seal need replacement. $4900 to fix.
4 people like thisFlag inappropiate
1995 Cadillac DeVille- 4.9L V874,000
Told half block leaks car. Thought I was getting a price on a good car. I will not buy another DeVille.
4 people like thisFlag inappropiate
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