Cadillac Engine Life
 

What is the average engine life on a N* engine? This question is in general as I am still openly searching and haven't found any specific cadillac of interest. I'm not sure if this question has already been answered on this forum, but I have searched both here and on search engines, and haven't found an answer. Any feedback, if only opinions, would be appreciated.


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RE: Average Engine Life
 

I can't tell you what the average is, but the very first N*'s (1993 allante) are still drivin around, many of them with well over 100k.With, PROPER MAINTENENCE,these motors should reach 200k easy, IMHO.

RE: Average Engine Life
 

we simply dont really know.
for the most part, the engines are outlasting the cars themselves.

a few fail prematurely, usually of no fault to the engine itself..
all the Cadillac and GM aluminum engines, including the N* are
a tiny bit sensitive to a combination of loss of coolant, overheat,
and depletion of oxidation protection from the coolant, and failed
headgaskets due to a combination of that.
other than that, they seem to go and go until the wheels fall off the car.

that includes all 4100, 4500, 4600 (early V8 N*) and the modern
NorthStars V6's & V8's.

IMO, any used N* engine car should be tested and certified for
headgaskets integrity, specially if you are paying $5,000 +++
check our FAQ section for the various tests ...

RE: Average Engine Life
 

I've seen 3800 V6's in salvage yard in cars with several hundreds on them, the most I've seenwas anOlds 98 with 409,000 km.. That's over 250,000 miles. I tend to agree with G.A.R.Y.

RE: Average Engine Life
 

I'm getting close to the 312,000 mile mark. I know Chevy gives badges and such for vehicles with over 200,000 or so.. I wonder if Caddy does that also?

RE: Average Engine Life
 

You should contact someone at Cadillac Conrad, you could be the Northstar Poster Boy!

RE: Average Engine Life
 

Ever open the engine?

what is the story on the tranny?

RE: Average Engine Life
 

In May I did a tune-up and when I was changing the plugs/wires, the wire boots had a rust residue on every one. Is that a hint there was a head gasket problem?(3rd owner) The transmission is original. Had it in for filter/fluid change in June. Everything looked clean. However, I do have the infamous tcc stuck off once in a great while.

RE: Average Engine Life
 

As far as I know aluminum does not rust. Rust is ferrous oxide and you would need some fe = iron content present to produce rust. :D

RE: Average Engine Life
 

iron needs water and oxigen to rust, aluminum only needs oxygen to "oxidize"
there is a reason all alum wheels are coated ...