Northstar Engines and System Technical Discussion Discussion, 1997 Seville STS - Oil Leak Problems? in Cadillac Engine Discussion; We're trying to sell our 1997 Seville STS, which we've never had any problems with. We agreed on a price ...
We're trying to sell our 1997 Seville STS, which we've never had any problems with. We agreed on a price with a potential buyer, who wanted to take the car to our local Cadillac dealer for inspection. Absolutely no problems with the car, but the dealer told our buyer that "around 80,000 to 85,000 miles, 1997 Seville STS's are prone to oil leaks." We lost our buyer and are extremely upset. I've done internet research to see if this is true, and have found no supporting evidence. What's going on - is the dealer just trying to sell his own cars (or possible a warranty) or is there a real problem with oil leaks? Any information anyone has would be greatly appreciated!
Thanks for your input. I'm curious, though... our buyer was told that it's specifically a "Seville STS problem," and not a Northstar problem. Your reply made it seem as though all new Cadillacs are "leakstars"! Is that the case?
I'm sure the dealer's not going to admit that, so we're just angry that he turned our buyer off our specific car. Thanks again.
[QUOTE=Laurie]We're trying to sell our 1997 Seville STS, which we've never had any problems with. We lost our buyer and are extremely upset. QUOTE]
Leaky N*s not always true. Do you have your service records?
1. How many miles?
2. How much are you asking?
3. Color, interior?
4. Speed rating? (located on driver door pannel: tire speed rating: S,H, Z )
5. Where are you located?
Thanks for your interest. We do have service records. In response to your other questions:
1. 76,500 miles
3. Black/Tan Interior
4. H rating
5. Lansing, MI
The car has a power sunroof, premium sound system & 12-CD changer, heated seats, chrome wheels & 3-channel garage door opener.
One interesting note: my husband called the Cadillac dealer and spoke to a service person who couldn't believe our potential buyer was told about possible oil leaks. He said that Northstars DO NOT leak oil; otherwise they wouldn't be so desirable.
Automobile(s): White Diamond '03 DHS (with DTS floor shift)
Re: 1997 Seville STS - Oil Leak Problems?
It would be very interesting to know who exactly your potential buyer talked to. Doesn't it seem kinda strange that the magic oil leak number is only 4-9K away. I smell a rat. I'll bet they just happened to have a "nice low milage car" on the lot and since it is also a potential oil leaker we have a "great warranty we'll make you a fantastic deal on". If I were your buyer and I believed all that crap I certainly would not buy your car OR the dealers. I'd be hightailing it over to Lexus. Don't worry, his loss is someone elses gain. I'm sure you'll have it sold quickly.
My 94 sls started leaking oil at 84k. It doesn't leak much. Only when the engine is off and the oil drains into the pan. I added 2 quarts of stop leak and this seems to have lessened the minor leak. It may go a month and I don't add any oil. It's driven locally in the streets mostly. It's now up to 89k, but still runs great and has lots of power. So if there is a leak, it's so minor that I can live with it. The mechanic told me it's a manifold problem near the oil pan.
Almost ALL Northstars leak oil eventually, some at extremely low miles. Most of the time the culprit is not the oil pan gasket, but rather the lower crankcase seals. Northstar engines have a two piece block that has thin rounded seals in between the two pieces. Very expensive to fix. Oil pan leaks happen also, and even valve cover gaskets to a lesser degree. If oil pan is soaking wet, stay away from that one, but if it's just slightly damp, with a little road dust stuck to it, don't worry about it.
Sounds like my '94 STS reflected the description by Mastertech-- unhealthy leak from what I thought was the "oil pan" at about 90K miles -- dealer said the engine had to be pulled for a replacement (as I recall about $7,000+); Engine rebuilder pulled the engine and replaced the seals(?) and stopped the leak but still cost about $2,000.
I have STS 94 with 69k miles. Never had a problem with a oil leak (or any leak) or consumption. Last time I changed the oil myself and noticed very small oil leak in the oil filter area. Actually may be just a bit note of oil. I think it's possible that it's just "leftovers" after oil change, cause i did it very mesy at first time. I will check again today, when I got home. If it just couple drops per day, i can live with it.
Hey guys this is my first post since I found this site yesterday. (Great site BTW)
I have a 94 STS I bought it last year and it had 120,000 miles. I noticed an oil leak sortly after. I took it to Pep Boys they said it was common for the Northstars @ that mileage, they also said that Cadillac is aware of the leak and has never done a recall because the repair costs over 1,800.00. Not believing them I took it to Cadillac. They confirmed almost verbatum what the mechanic told me that it was where the top and bottom of the engine meet and the seal. I have to add 2 quarts of oil once every 3 weeks but it is worth it, I love my STS, now if only I can get the air to work. BTW I have used almost every type of stop leak and it does nothing, any suggestions on something that might work would be appriciated. (I'm tired of cleaning my driveway every week.