Wednesday, Aug 25, 2004 at 21:33
Hi Will,
Just a few questions ah ;-)
First of all, your engine number is ~9,500 higher than
mine so one can safely assume its a new engine, not a reconditioned one. As for "definite nissan info not hear say and word of mouth", this is the problem, Nissan simply do not give out info and one has to rely on what they see, read and hear. Then one has to place value judgements on the reliability of the info. The same way you will have to on this info!
As for the recall in Europe, I read that on many forums and heard from many people who I consider reliable. But definitive proof could probably be sought by tracking down the relevant govt transport website and look for a recall notice.
As for the wiring loom change, this does make sense. I am sure Nissan would have made some changes to motors post mid 2000 as this was when the sump increase (dipstick change!) was done. Thus new Aussie vehicles post mid 2000 would probably have received ECU mods with extra sensors to try and improve reliability (my guess is limit fuel load if engine temp exceeds a certain limit). Other changes that I have heard about (not from Nissan) include larger oil galleries, more/increased piston oil sprays, dual oil pump pickups, extra sensors etc... While I believe this to be the case, it is not confirmed from Nissan sources.
As for 704 C exhaust temp, this is not that hot IMHO, especially compared to petrol engine exhausts, they can be considerably hotter (like 850+C). The holed pistons are caused by excess temp, but the extra oil sprays should have a significant impact on this. Exhaust gas temp alone is not a true indication of piston temp. Oil temp plays a big factor here, particularly when oil sprays are used to cool pistons.
Speaking of oil, I believe this to be a contributor to some of the failed motors. Nissan specifically states to use CF4 oil and NOT CG4. The reason behind this is that CG4, even though a "higher" spec, has a lower ash (detergent) content. If the higher spec CG4 was used, this could lead to high oil gallery deposits due to the lower ash content. Add to this that the Aussie spec for diesel was 1,500ppm sulphur content at the time while Europe had 50ppm, then you can start to see some of the problems being faced.
CG4 oil is not that easy to come by (go
check your local servo or even auto
shop and see if you can find any!!!), all local stock is typically a higher grade. Synlube (an advertiser on this
forum) specially formulated an oil to specifically meet the grade Nissan 3.0TD's require as it simply is not readily available.
Australia now has a 500ppm max sulphur content and this lowers to 50ppm by 2006. It is this reason why we are starting to see high performance diesels become available in Australia, the dirty Aussie diesel simply did not allow for the high tech engines. I only fill up at Shell or BP as these outlets offer low sulphur (<50ppm) diesel already.
While the 3.0TD has a specified oil interval of 10,000kms, I religiously change my oil every 5,000kms. It is perhaps the cheapest insurance for long engine life one can get. I would recommend you do this on your new engine. And do NOT use CG4 either!!!
As for a compression
test a
sign of engine failure, I do not believe this will show anything for the type of failure of the series II engine (just my opinion - not fact). Even if a piston has minor pock marks from excess temp, a compression
test would never show this up.
I tow my van (1.6T) and have also done 22,000. It also gets a good workout as a offroad 4WD and is driven hard (between use as a daily commutor). I do not beileve the series III engine has any of the problems the series II had. However, it is still prone to sensor failures (airflow) and EGR valve failure, but not any more than other vehicles with these parts.
The 3.0TD engine has got a bad reputation but I do believe this is not warranted for the series III. There are many examples around with over 200,000kms with no issues at all. In fact I have yet to hear of one series III failure from the OWNER (not the sisters brothers uncles mate!!!), unlike the series II who I have heard form many owners (like yourself).
While engine failure of series II is high, as a percentage of vehicles sold its low (~10% according to a poll on another
forum, but thats FAR from accurate as disgruntled owners are more likely to seek out the
forum). But engine faiulure should be less than 0.0% at the age they are going so their is no question something is not right.
So, my opinion is that Nissan got caught out introducing a high tech engine while Australia still had poor quality diesel (plus simply poor design for high ambient temp climate amongst other things). While I believe they have gotten on top of the problem now, there is still the legacy of the series II 3.0TD's out there. Nissan currently replace them out of warranty now, but for how long? And at what cost to their customer base due to disgrunteld series II owners!!!
Cheers
Captain
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