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2002 Deville base
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Discussion Starter #1
I've heard mixed opinions on this its a 2002 Deville some people on other websites like youtube for example say put the pedal to the floor and drive it hard and others say baby it i wanna know other people's experiences with these cars and how they drove it and how many miles you can get out of this engine Im curious so let me know right now i drive conservatively with the occasional wide open throttle pull
 

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drive it with the pedal to the floor and your next post will be why am i loosing coolant?
 

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Super Moderator
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86,155 Posts
The engine was designed to be driven hard. Won't hurt a thing.

The WOT procedure was more important on the pre 2000's due to carbon build up in the "squish" area in the combustion chamber. Carbon would build up and the piston would contact it, causing the piston to rock on the wrist pins and the skirt would slap the cylinder wall. It would sound like a collapsed lifter and a dose of WOT would clean it out. After the 2000 redesign that doesn't happen much any more so the WOT is more for fun.

It has nothing to due with HG failure.

P.S.
During testing, the Northstar was run at WOT for 300 hrs (12.5 days) straight at WOT.
Think you'll ever get anywhere near that much WOT time on your car?
Drive it and enjoy it.
 

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The engine was designed to be driven hard. Won't hurt a thing.

The WOT procedure was more important on the pre 2000's due to carbon build up in the "squish" area in the combustion chamber. Carbon would build up and the piston would contact it, causing the piston to rock on the wrist pins and the skirt would slap the cylinder wall. It would sound like a collapsed lifter and a dose of WOT would clean it out. After the 2000 redesign that doesn't happen much any more so the WOT is more for fun.

It has nothing to due with HG failure.

P.S.
During testing, the Northstar was run at WOT for 300 hrs (12.5 days) straight at WOT.
Think you'll ever get anywhere near that much WOT time on your car?
Drive it and enjoy it.
i agree that the occasional WOT accelerations are fine but the post indicates flooring it all the time, no engine will take that abuse
 

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Super Moderator
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Really? Then how do you explain the 300 hrs of WOT? Talk about abuse.
I'd like to meet the person who has anywhere near 300 hrs of WOT time (on ANY car).
 

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yea testing was done on a brand new engine, the op,s is 17 yrsold and who knows how many miles are on it and what condition its in? and what condition the rest of the vehicle is in?
 

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2004 Deville base
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288 Posts
Hmmmmm, the car is older than the operator...
:ROFLMAO:
"I will definitely get a test kit first and try then i will try to check the purge line after that is the test doesnt show a head gasket leak if the gasket is blown im screwed cause im only 16 and i have some knowledge on fixing cars but not enough to replace a head gasket on a northstar."

Dogging this one seems less than prudent. Add in the 'Man in Blue', less than good sense that we(at least I) had way back when, and wallet,,,well...

 

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-Administrator- 2002.5 F55 STS 2014 FWD Explorer
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66,616 Posts
If the 2002 Deville in question is a Y-car then it's speed limited to 112 mph and it will be almost impossible to overload or hurt the engine (given proper care and maintenance).

Just don't go crazy and beat on it. There is a big difference between hard driving and abuse, and it takes lots of driving and lots of money to learn the difference.
 

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2002 Deville base
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24 Posts
Discussion Starter #10
Hmmmmm, the car is older than the operator...
:ROFLMAO:
"I will definitely get a test kit first and try then i will try to check the purge line after that is the test doesnt show a head gasket leak if the gasket is blown im screwed cause im only 16 and i have some knowledge on fixing cars but not enough to replace a head gasket on a northstar."

Dogging this one seems less than prudent. Add in the 'Man in Blue', less than good sense that we(at least I) had way back when, and wallet,,,well...

Nah i actually drive like a grandma the thing is lucky if it even sees more than 3500 rpm just wondering how other people drive these cars and how they last i certainly wouldnt wanna be hauling around wot in a big almost 4000 lb caddy on a daily basis
 

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2003 Deville base
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10 Posts
I've heard all the horror stories about the N* over the years as I'm sure many of you guys have. In my years of selling Caddys I never had a complaint about the engines not handling the pressure of the right foot. In fact, last year I drove my 03 Deville with 172k from Maryland to Alabama 13 hours straight stopping only twice for gas and food. Drove the hell out of it. Not like a fool, but at constant speeds in excess of 75mph. Ran flawlessly. Lost about half a quart of oil, but otherwise all good. Keeping it serviced, using common sense, and paying attention to the great advice on this forum should help tremendously.
 

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-Administrator- 2002.5 F55 STS 2014 FWD Explorer
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I can honestly say that, with very few exceptions, my STS has seen WOT redline runs in 1st or 2nd every time it gets driven. After 10+ miles of warmup, though.

The thing simply loves to cruise I-95 at 70+ for hours on end. It still gets one or two Maryland-Florida round trips a year.

Remember - this is a "what's wrong" website, not an "I love it !!" website. ALL the warts are compressed in here. Maintain accordingly.
 

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Master of the Dark Art of Diagnostics
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18,818 Posts
I've heard mixed opinions on this its a 2002 Deville some people on other websites like youtube for example say put the pedal to the floor and drive it hard and others say baby it i wanna know other people's experiences with these cars and how they drove it and how many miles you can get out of this engine Im curious so let me know right now i drive conservatively with the occasional wide open throttle pull
============================
Im curious so let me know
right now i drive conservatively with the occasional wide open throttle pull

PERFECT!
that is the BEST treatment for our Cadillacs
 

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2002 Deville base
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24 Posts
Discussion Starter #14
I've heard all the horror stories about the N* over the years as I'm sure many of you guys have. In my years of selling Caddys I never had a complaint about the engines not handling the pressure of the right foot. In fact, last year I drove my 03 Deville with 172k from Maryland to Alabama 13 hours straight stopping only twice for gas and food. Drove the hell out of it. Not like a fool, but at constant speeds in excess of 75mph. Ran flawlessly. Lost about half a quart of oil, but otherwise all good. Keeping it serviced, using common sense, and paying attention to the great advice on this forum should help tremendously.
Isnt it normal for these engines to go through oil?
 

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-Administrator- 2002.5 F55 STS 2014 FWD Explorer
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66,616 Posts
No. Most Northstars are misers when it comes to oil burning. Regular healthy engine exercise keeps oil burning to a minimum. My 2002 gets over 6500 miles to a quart of 5W-30 synthetic.

That said, some of the engines had troubles with oil pan seals, halfcase seals, front and rear crankshaft seals, oil filter adapter seals, oil pressure sending switch, and cam cover gaskets - each has its own repair protocol and NONE of the leaks (except for the filter adapter/switch) are even remotely inexpensive to fix. It takes a LOT of drips to equal the $2700 fix for a weepy halfcase seal.

I believe we have asked you to study the below article before. Here it is again - please read the entire article, written by a CF member who was a Cadillac Northstar Powertrain Development Engineer.

 

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2004 Deville base
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288 Posts
Agreed on oil use.
The 2004 has not lost a 1/2 quart in 4mo/5000mi.

Most of the loss is leaks, which pisses me off, I would kind of/sort of like it to stop. Nothing cheap/easy is the leaker. I would "maybe" add some stopleak, but it was filled and no room on the stick to add more of anything. Firm believer in 1/2 stick is full enough/check it at every fueling or so and let the engine write the history of WTF to do/think. Overthinking is not user friendly.

A recent trip proves out what great cars these are. 1500mi fwy/100city
59gal used, plenty of hills(2000-6000ft), and load on the return trip. 27mpg.
77mph avg 4-6hrs at a time.
And a few WOT uphill pulls, 3rd gear, 50-80mph...traffic...

Excellent ride. Beats hands down our '07 Lucerne CXL3.8...mpg/everything.
Still shows 24mpg avg. and I been driving in town for a week,hahaha
 

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-Administrator- 2002.5 F55 STS 2014 FWD Explorer
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66,616 Posts
"..... firm believer in the half stick is full enough......"

For our FWD Northstar cars that's straight from the GM/Cadillac tech shop in a TSB - here - read it. About P.2 and P.3 - the section on verifying oil consumption -


Here's a representation of a 2000 - 2005 FWD Northstar dipstick and the correct oil level, engine off for 5 minutes, warm, level surface.

<=== ADD XXXXXX XXXX <-- OPERATING RANGE===========O

The A in ADD is one quart low, the tip of the stick is 2 quarts low - and about where the oil level sensor trips the DIC message.

oil pan 7 quarts.jpg
 

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2004 Deville base
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288 Posts
Yep. 1/2 way in the operating range is for me. Sometimes/some cars/some parking situations, even lower is better. Leaks set the plan. Potential leaks.

Transverse engines not as bad, but longitude mills filled/overfilled, are bad news on rear seals/pan gaskets, when parking on an incline. I would much rather run a bit low and change a bit more often, than fix leaks I could have prevented.
Not to mention track cars/levels/windage trays/etc. More is not always better.
 

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Super Moderator 2003 Deville Base SEMPER PARATUS
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4,333 Posts
I guess I've been super lucky. My 2003 doesn't leak and I use about 1-1.5 quarts between oil changes, which according to the OLM is about 8k miles. Around town it's conservative driving, but outside of town I see WOT 2 or 3 times a week, sometimes more. I shut off the a/c, radio, roll the windows down just to hear that wonderful sound.
 

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2003 Deville base
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10 Posts
Can relate to the sound. The older it gets, the more it seems to "speak" to me. Although I detest the dots of oil that have accumulated on a certain spot in my driveway, I much prefer to "lose" a little as opposed to "use" or burn oil. Seems to be oozing around the pressure sending unit, which will soon be replaced. Another task made manageable by following a thread on this forum.
 
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