Question about 1997 Cadillac DeVille

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I have a 1997 Cadillac DeVille and I put a quart of oil in every week and I drive about 700 miles a week. This has been happening for three weeks. Now I have a large puddle of coolant under the passenger side. Any suggestions?

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Sounds like you have a blown head gasket. Your local friendly mechanic can properly diagnose that for ya. Good luck!

Posted on Mar 21, 2011

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My 1997 cadillac deville, northstar w/85, regular oil changes, burns almost 2 quarts of oil every change. It is not leaking.


If your car is losing oil, and if there is no evidence of oil leaking, there is no question that it is either losing it through piston rings or through the head (head gasket or valve guides).
Best thing to do is use a HEAVIER WEIGHT oil than specified for the vehicle when new, regularly monitor your oil level and be sure it never falls below one quart low, and consider having the engine overhauled when you start noticing a performance deficit or hear mechanical noise (such as rod knock) from the engine.

Apr 18, 2014 | 2003 Cadillac Deville

1 Answer

Engine ran out oil every 3 weeks


out? as in oil pan is empty or dips stick shows. ZERO oil?
weeks dont count.
1: miles only count , 1./3 quart (liter) per 3000 miles is good.
2:or drips on pavement.

btw i can do this on a new car, just driving way too fast i can drop oil level by 1/2 court in 1 week. about 500 miles.

tell how low the dip stick got in how many miles and speed you drive.
we have 85mph here and way faster on the autobahn.
no locating stated. here is USA< and dallas.

Nov 22, 2013 | Honda Odyssey Cars & Trucks

1 Answer

Hi! My 1999 Cadillac Deville for about 2 weeks started messaging low refrig-ac-off. Check engine light on!.


When you change your oil is up to you,you set the
months & miles you go. Any car with a reminder
for oil is just a gadget

You were told that your low on a/c refrigerant by the
message

Now the check light related or not has to be addressed,
by checking for codes & diagnosing the effected system

Your a/c system needs repair,not added to, only to leak out
& polute the atmosphere

Nov 14, 2012 | 1999 Cadillac DeVille

1 Answer

I have an extended warranty what should I do. It burns like 2 quarts of oil a week and less than 200 miles.


get rid of it,anything that is using or loosing that much oil has problems,sorry

Sep 06, 2012 | 2001 Cadillac DeVille

2 Answers

Loses qt of oil per week. No leak shows underneath car and does not smoke


It can easily burn that much in a 100 miles without seeing any smoke.
If you check the spark plugs you may find evidence.
It can also leak while the engine is running and not when it is off. Most Northstar engines leak to some degree.

Sep 05, 2012 | 1997 Cadillac DeVille

1 Answer

I own a 1998 deville that has 120,328 miles of which 664.6 are my driven miles. I was told when I purchased that it had a small oil leak. I got an oil change about 6 weeks +/- a week, after which i noticed...


Hello: There isn't any temporary repair. It is a major task to seal the oil leak, the engine has a two piece oil pan. To remove the oil pan either the transmission or engine has to be removed to accomplish the task.

Aug 25, 2011 | 1998 Cadillac DeVille

1 Answer

Oil pressure light comes on as I am driving the stop enine light


ok, change the oil to proper viscosity. This happened to me on my 1997 Cadillac Deville. The manual says that when this happens, the oil could be too thick (filled with gunk I suppose). Oil won't flow right when it hasn't been changed for a while.

Jun 10, 2010 | 1997 Cadillac DeVille

1 Answer

Disappearing oil


It is burning it, and it may be sticking to the inside of the exhaust system, like the cat converter and muffler. Look at the exhaust when you start it from cold, and take a little sniff.

Jul 28, 2009 | 1997 Cadillac DeVille

1 Answer

Excessive oil use


the time it takes to use one quart is not the figure I need, how many miles does three weeks represent? 1000 miles per quart is ok, less and you will need new rings in most cases, which of course means an engine overhaul.

Mar 13, 2009 | 2002 Saturn L-Series

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