more on Piston Broke & 3.0TDNissan

Submitted: Sunday, Sep 24, 2006 at 22:14
ThreadID: 38017 Views:4159 Replies:3 FollowUps:34
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Hi to all,
Hard to get a direct reply to all but I have mentioned a few things at bottom of 2nd PostID:37953.
I have in front of me the Latest Nissan Brochure for the patrols with the Towing capacities (with brakes) & the comparison is interesting between the 4 cyl 3.0 Ltr STL TD Manual & The 6 cyl 4.2 TD STL Manual.
3.0 power 118 kW @ 3600 RPM- 380 Nm Torque @ 2000 RPM
Max tow weight 3200 Kg (4wd Tare weight 2480 KG)
4.2 power 114 kW @ 3600 RPM- 360 Nm Torque @ 2000 RPM
Max tow weight 3500 Kg (4wd Tare weight 2530 KG).
Summerising
The 4.2 has less grunt ,
the 4.2 weighs only 50KG more than the 3.0 Ltr
but the 4.2 is rated to tow 300kg more than the 3.0 litre.
Granted that there is a weight difference but I am suspicious that the specs are trying to protect the 3.0 litre from overload as they are perforimg at their peak at the best of times. ...Makes you wonder sometimes.

I wish I had done my homework a bit better when we made the quantom leap last year to buy a 3.0 litre. Anyway you can be rest assured that if Nissan don't come to the party that it will be repaired with pride & much skill but we will have to upgrade to pull the Van. Apart from the motor I can't fault the vehicle. The STL is lovely model,
cheers
Don
I would be in fear of a failure everytime we set off.
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Reply By: Truckster (Vic) - Sunday, Sep 24, 2006 at 22:34

Sunday, Sep 24, 2006 at 22:34
I feel for u, but as many others have done, fix it and flog it.
AnswerID: 196313

Reply By: Member - Captain (WA) - Monday, Sep 25, 2006 at 00:26

Monday, Sep 25, 2006 at 00:26
Hi Don,

I know once bitten, twice shy but believe it or not, you are the only owner reported series III 3.0TD failure to date. Even the fabled 4.2TD has had an engine failure when quite new and required a total engine replacement, look at your last post.

As you say, research is the key here and if you look back thru the archive posts you will see where people who have had both the 3.0TD and the 4.2TD, they prefer the 3.0TD for towing, especially if an auto (the 3.0TD lacks a bit of punch right down low when in manual guise - nothing that cannot be fixed with a Dtronic).

Also, the archilles heal of the 4.2TD is overheating. Again check the archives and see all the posts. Or ask Roachie just how much he has done and still hasn't solved the overheating issue!

I agree the series II had issues and I wouldn't recommend anyone buying one, but that doesn't take away from the fact that there are many, many series II with high mileage and no problems. But the series III is different and they have been out 4 years now with just your reported failure (there has been other hearsay reports, one I heard of where the sump plug came out!). But the series II had many failures, the first within 6 months of release, and that engine was recalled and replaced in Europe - still don't know how Nissan Australia got away with a shortened dipstick here!!!

As for the engine being stressed, you as an engineer would know that displacment can have nothing to do with critical stresses, bearing loads are much more important, amongst other design factors (I too am an engineer). Other diesel 3.0TD's are generating over 500Nm of torque from the factory and the ZD30 motor is used in many Renault trucks in Europe.

Virtually all sledging of the 3.0TD's is from non-owners, with most owners loving their 3.0TD. One can say that we have a vested interest saying they are good (re-sale value), but in my case I will get a new 4WD every 3 years and don't have to worry about re-sale as my work picks up the tab (lucky yes, but thats the facts).

Having said all that, I will most likely not buy another 3.0TD, not because I don't reckon they are great, but simply because I will try something different. But I reckon you should make a decision on facts (the engineer in us) rather than emotion and hearsay from the ludlites on this forum.

But then again, if my series III did fail, even if it was the only one, I too would most likely shy away from it. But if considering the GU4.2TD, research the overheating issue if you are towing and draw your own conclusions. One thing is certain, everyone on this forum certainly has their own opinion and its why it is such a great resource. But one does have to sort the wheat from the chaff!!!

Cheers

Captain

PS. Keep it up with Nissan, they will probably come to the party eventually but you will need to keep the pressure up without getting angry with them. I had a minor issue with my rear brake light cover. After no luck regarding warranty I sent an email to Japan. Well ~5 weeks later I have a call from Nissan Australia and bottom line is my vehicle is now booked in to get fixed and being met by customer relationship manager when it does (would have booked in earlier but overseas for a few weeks for work).

AnswerID: 196333

Follow Up By: Peter McG (Member, Melbourne) - Monday, Sep 25, 2006 at 09:13

Monday, Sep 25, 2006 at 09:13
Captain,

What's the email for Japan? I am still waiting for a response on the "loss of the right rear wheel" issue. My dealer has been great but Nissan Australia?

Cheers

Peter
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Follow Up By: Member - Captain (WA) - Monday, Sep 25, 2006 at 10:10

Monday, Sep 25, 2006 at 10:10
Hi Peter,

I got the email address off this forum, after another member reported a similair response to me. The address I used was "nissan-ir@mail.nissan.co.jp" I was suprised to get a phone call from Nissan Australia after many weeks of nothing, definetly felt that they were concerned about the fact I contacted Japan direct.

Anyway, the Nissan Australia dude had my local dealer customer manager ring me and she was doing some talking. Might be the fact that I am due a new vehicle next month and the fact I told Nissan Japan that too (but going to wait for the new 2007 models... like the sound of a V8 diesel cruiser or a H3 Hummer - if in diesel).

Anyway, send off an email and see how you go.

Cheers

Captain
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Follow Up By: jorgejhandal - Monday, Sep 25, 2006 at 10:16

Monday, Sep 25, 2006 at 10:16
He is not the only one having aseries 3 patrol engine failure. mine was 2004 and failed .

About the email of japan, can you provide me with the email I would like to contact nissan directly in japan to let them know about some problems with my other cars,
thanks
jorge
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Follow Up By: Truckster (Vic) - Monday, Sep 25, 2006 at 10:20

Monday, Sep 25, 2006 at 10:20
jorge, dont bring facts in to this.


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Follow Up By: Member - Captain (WA) - Monday, Sep 25, 2006 at 10:27

Monday, Sep 25, 2006 at 10:27
Hi Jorge,

I was referring to series III failures within Australia. As discussed in your original post, there were many theories put forward. But even so, that does make 2 owner reported series III worldwide, not a bad statistic anyway and still less than 4.2TD failures ;)

Cheers

Captain

PS. I am currently in Chile for work at the moment, not that far from you if I remember correctly.
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Follow Up By: Mike Harding - Monday, Sep 25, 2006 at 10:33

Monday, Sep 25, 2006 at 10:33
A neat trick to discover the e-mail address of senior executives in a company which has worked well for me before (had the VP of Zilog batting very nicely for me :) is to first establish the e-mail format for the company by some Google work, ensure you get 3 or 4 examples, eg. Nissan Japan might beornote the use, or otherwise, of capital letters, it probably won't matter but it might.

Next Google for the sort of person you want, eg "nissan japan customer relations vice president" (don't use quotes) it shouldn't take long before you discover that the Director of Sales (or whoever?) is Yossi Moto - so you now have the e-mail address of- go tell him your problem! :)

Of course they may publish e-mail addresses on the company web site, but I doubt it.

Mike Harding
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Follow Up By: Mike Harding - Monday, Sep 25, 2006 at 10:35

Monday, Sep 25, 2006 at 10:35
Ignore post above - bloody forum filters e-mail addresses enclosed in chevrons! Try again:

A neat trick to discover the e-mail address of senior executives in a company which has worked well for me before (had the VP of Zilog batting very nicely for me :) is to first establish the e-mail format for the company by some Google work, ensure you get 3 or 4 examples, eg. Nissan Japan might be [Fred.Smith@nissan.co.jp] or [Peter.Jones@nissan.co.jp] note the use, or otherwise, of capital letters, it probably won't matter but it might.

Next Google for the sort of person you want, eg "nissan japan customer relations vice president" (don't use quotes) it shouldn't take long before you discover that the Director of Sales (or whoever?) is Yossi Moto - so you now have the e-mail address of [Yossi.Moto@nissan.co.jp] - go tell him your problem! :)

Of course they may publish e-mail addresses on the company web site, but I doubt it.

Mike Harding
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Follow Up By: scottcamp - Monday, Sep 25, 2006 at 10:38

Monday, Sep 25, 2006 at 10:38
Hi Guys,

jorgejhandal are you the same person who reported 4 Discovery 3 failures? Without sounding offensive wherever you come from has got some serious servicing problems. The Discovery 3 has its typical share of problems. I come from the Land of Landrovers, obviously they are the best 4x4 on the planet! We have more discovery 3's than most countrys and i have yet to hear of ONE engine failure, and i mean we beast these machines to death. So why do i drive a patrol, apart form it being a great car, i am waiting on the new Defender in a year. whats wrong with you australians can you not recognise superior engineering. Afterall 80% of Africa, that was the first car they seen the DEFENDER :-)

But all joking aside 4 Dicovery failures, your having a laugh.

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Follow Up By: scottcamp - Monday, Sep 25, 2006 at 10:51

Monday, Sep 25, 2006 at 10:51
Hi Guys,
I forgot the FOUR discover failures happened before 1500 Miles. EVEN Landrover are not that bad :-).

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Follow Up By: Off-track - Monday, Sep 25, 2006 at 11:06

Monday, Sep 25, 2006 at 11:06
How can you seriously say that there are only two series III or later 3.0TD failures reported? Not everyone who owns one posts to this forum. There may well be others (almost a given) but I dare say that my opinion would be that there wont be nearly as many as reported in the series II.
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Follow Up By: Member - Roachie (SA) - Monday, Sep 25, 2006 at 11:13

Monday, Sep 25, 2006 at 11:13
G'day Captain.......

Just one small point of order, if I may, please. Neither my 4.2 nor any of those about which I know (or have read), has ever actually "overheated". I have consistently used the term "over-warming". I know this sounds like it's splitting hairs, but the term "overheating" tends to conjour-up the sight of a vehicle pulled over on the side of the road with the bonnet up and some poor hapless mongrel standing at arms length, trying to get the radiator cap off with steam gushing all over the place.

To my knowledge, the 4.2's "over-warming" issue (note I do not use the term "problem" either) has never led to a vehicle being stranded. Indeed, Nissan have said all along that it is quite okay to still drive the vehicle (any vehicle I suppose) when the temp needle heads across to the right; so long as it doesn't go into that final section I refer to as "the danger zone". I have also had it said to me many times that a diesel engine needs to operate at a decent temperature to be efficient. The highest mine has ever got to (according to the VDO gauge who's sender unit is mounted halfway along the top radiator hose) is 118oC and I am given to understand that about 126oC is when one needs to get really concerned.

I did read in one of the recent posts on here that a 4.2TD failed very early in it's life. I don't have any details of that failure....it is totally out of character and for all we know, some yobbo forgot to put any oil in the sump at the factory...hehehe.

I personally know of one bloke on this forum (g'day Craig) who has gone from a 3L to a 4.2TDi.....and couldn't be happier (he even reckons the new one feels more powerful, but that's just a seat-of-the-pants analysis I guess).

I still feel "worried" when I see the factory temp gauge go above half way; despite "knowing" that is entirely acceptable and 'normal' for this heavy lumpy motor.

I am not trying to fuel the long-standing debate about the 3L v 4.2L motors; I just wanted to clarify that point about "over-heating' v "over-warming".....

Cheers and I hope you're enjoying your time overseas.....it'll make you appreciate Aust even more when you return.....

Cheers

Roachie
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Follow Up By: Member - Craig D (SA) - Monday, Sep 25, 2006 at 11:37

Monday, Sep 25, 2006 at 11:37
Couldn't be happier? Now that's an understatement - I'm rapped!!!!

For Example:

After driving the 3L for six years I take the new 4.2 with 4k on the clock to one of my usual haunts - the torque-sapping Mallee dunes and talcum poweder soft sand.

My 4.2 out-climbed my old faithful at every hill, it beat the petrol 80-series I'd tried to keep up with (let alone out-do it) for all those years, it pulled harder than my mates V8 100 series with lockers (hah-hah) and it didn't need to be slaughtered through it's rev range to do it. Happy - YEP :)

Anything else? Yeah - no more bloody reliability worries (I have a very long printed history of the bit of chite if ya interested) where I as car-less for months on end.

Okay there must be some downsides. Yes. The 4.2 is a bit slower than the 3 taking off, but once up at hwy speeds there's not much difference. The 4.2 does use more ful but it has two extra pots now doesn't it.

Here's a funny downside (if ya can call it that) - at highway cruising speeds I can't hear the bloody donk!

Three Litre with Dtronic vs 4.2 tdi with 3" zorst and dump = I'll take the 4.2 thanks!

Don't mean to sound overly biased, but after having owned both I think I qualify to have an opinion.
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Follow Up By: dj Patrol - Monday, Sep 25, 2006 at 15:05

Monday, Sep 25, 2006 at 15:05
Hi Roachie, The 4.2TD failure is an still is mine YES it did have oil in it,It was filling my garage full of blue smoke on cold start up and I mean FULL from new at 700km Nissan were involved.To get to the point without going through months of haggeling with the Dealership that I brought it from(new nothing about diesels) I rang one in Sydney and Service Manager told me to take it down within no time he was tremendous he was straight into Nissan and after changing Injectors and Pump trial, was left overnight in workshop I took keys home Next mourning we all had a big meet with all the Head Sharrangs from Nissan and as START up was near I handed the keys to the workshop forman he proceeded to start the engine and BINGO filled the workshop with smoke nobody could se each other all looking at each other and speechless,So they turned to the service manager and told him they would orginised a short motor from Japan, 3 months later I got the patrol back as driving up the driveway the clutch was slipping and shuddering so I stopped and got service manager .Yep had to order a new clutch from Japan another six weeks.I had a loan car all this time, dj patrol
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FollowupID: 454684

Follow Up By: dj Patrol - Monday, Sep 25, 2006 at 15:16

Monday, Sep 25, 2006 at 15:16
May have been one in a million but I got it,,

Now I love this old beast just chugs along with the van 2.5 ton no worries
have done 108000, now no problems so I would reccomend the 4.2TD to anyone but hurry they are being deleted I belive next year.What a shame Mabey too good.

Another thing I was passed heading down to Coober Pedy by a 3 litre in 2001 with around the same size van in tow I was sitting on 100kph and he zoomed pass me and off into the distance NO WONDER some of them are blowing up just cant treat them like that.

Hav a nice day dj patrol
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Follow Up By: Member - Captain (WA) - Tuesday, Sep 26, 2006 at 13:13

Tuesday, Sep 26, 2006 at 13:13
Hi Roachie,

Point taken, but I have read a lot of posts where people say they stop / slow down etc... so its not allowing driving as desired. But agree I have yet to hear an engine expire because its overheated while driving (I don't count blown hoses, holed radiators etc...).

And don't get me wrong, I reckon the 4.2TD is arguably the best 4WD engine for a vehicle thats offroad and going slow in low range. The Toyota 4.2TD has only marginally more punch than a 3.0TD at low revs, even the 1HZ non-turbo has noticeably more bottom end grunt (talking idle speeds).

But going slow in 4WD low range is not done by all and hence other engines are better all-rounders, depending on what you do. While I love to get out in the bush, I unfortunately don't get out and about as much as I would like. Hence my nicely kitted out 4WD is more often a toorak taxi (hear scruby shouting in the background...). But the 3.0TD is in its element, it has great acceleration in city traffic, I get over 1,000kms between refills and it used to tow my 1.6T van like it wasn't there (have seen 140km on speedo when overtaking with van- was suprised as speed obtained and did not realise as busy getting past road train). And the Dtronic has significantly improved the bottom end, its just great on the sand and most other places (but still rather my 80 series for low range idleing ability).

I suppose its just too much to ask that others open their eyes and see the many advantages of the 3.0TD. In fact, i reckon the 3.0TD suits the vast majority of Nissan drivers better, its only the "real" 4WD's who frequent this forum that need the 4.2TD offroad prowress. But Nissan must take a big slice of that blame as they allowed the series II to destroy the good reputation the series III deserves.

Over here in Chile, all 4WD's are diesel and hardly seen anything bigger than a 2.5TD (exception is Hilux 3.0TD). The Navara here is old shape but new 2.5TD motor. And on the minesite I am at, there would be 10 Navara's to 1 hilux, they are the preffered vehicle (all vehicles must be <2 years old to be on-site and CANNOT be white - due to snow).

Cheers

Captain
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Reply By: scottcamp - Monday, Sep 25, 2006 at 10:20

Monday, Sep 25, 2006 at 10:20
Hi Donald,

You will notice i am also on captains side when it comes to the 3.0 series III, i honestly think the engine is sound. Please do not think i was getting at you on the previous post. I can fully understand why you do not take your car to Nissan for servicing, most them could not give a crap about your car. As a marine engineer you could build the engine with your eyes shut, BUT in these circumstances you done wrong. You should have just dumped the car on Nissan, it's their problem afterall, let them deal with it. Of all people you should realise that in the marine engine enviroment that small engines with large outputs are the norm, the 3.0 Nissan is a long way from being stressed.

Look for example the Cummins link below:

http://www.cmspower.com/Cummins/Marine.asp#m4B250

I hate boats and anything to do with the water but my father loves boats(ex royal navy) and has many friends with boats. I spoke to him tonight and he informed me many people use the Volvo D4-260 which is a 260 Bhp 5 cylinder, he waffled on about it being tiny so good for many small inboard boats, whatever that means. So of all people you should realise that 160Bhp 3.0 is nothing. One thing for certain it certainly is not stressed!

I think the best you can hope for is Nissan supply the parts and you rebuild.

Anyway, I hope it all works out for you.

Cheers

Scott
AnswerID: 196371

Follow Up By: Off-track - Monday, Sep 25, 2006 at 11:08

Monday, Sep 25, 2006 at 11:08
It certainly is when hauling a big load.
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Follow Up By: scottcamp - Monday, Sep 25, 2006 at 11:13

Monday, Sep 25, 2006 at 11:13
Hi off-track,

Most medium boats are much heavier than the patrol and they have to push through water. I know not exactly a fair comparioson but small engine does not mean poor reliability. Trust me soon a 3.0 will be classed as massive if all the do-gooders get their way.
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Follow Up By: Chris & Debbie - Monday, Sep 25, 2006 at 11:50

Monday, Sep 25, 2006 at 11:50
Seems there is a bit of confusion with stress and the size of an engine. An engine should be designed to handle the power it can produce, if you modify the engine to put out more than it is designed for eg. engine modified for racing, then you are placing stress on that engine that it was not designed for. As engines get more efficeint and put out more power they engine is redesigned to handle that power.

Chris
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Follow Up By: StephenF10 - Monday, Sep 25, 2006 at 12:11

Monday, Sep 25, 2006 at 12:11
Of course engines of any size are built to handle their designed output, but it's going to take a long time for the myth of small engine=unreliabilty to go away. Whenever a small engine blows up the "experts" are only too quick to quote the myth as if it explains everything. They conveniently ignore the thousands of small diesels that have been plugging away doing their job reliably for years.

Stephen.
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Follow Up By: Off-track - Monday, Sep 25, 2006 at 14:18

Monday, Sep 25, 2006 at 14:18
It is true of course that a smaller displacement engine can handle high hp and its associated stresses, if it has been (over)engineered correctly. The problem here is that the efficiencies and performance of a high hp/small cube engine can be lost with heavy internals and so it becomes a sort of hit and miss to try and get the right mix of performance v reliability (v cost of technology). Additionally as every pot has to work that much harder the combustion chamber temps rise which leads to piston damage - normally in the form of holes or cracks. This is exactly what the 3.0 is doing - the bottom end is fine but the temps are getting too much for the piston material.

In a big engine there is a lot more 'fat' or 'fudge figure' to play with before it starts becoming a handgrenade.
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Follow Up By: Donald A - Monday, Sep 25, 2006 at 22:01

Monday, Sep 25, 2006 at 22:01
Scott.
I am still plugging away at Nissan and I want to comment on motor design as mentioned above.
If an engine or motor for the want of a better word has to endure a range of loads, then the motor selection should not have to go to the peak of it's capabilities to do the job. It should have a built in redundancy or in laymans' terms
as Off-track mentioned... built in FAT. say a factor of 1.4 at least.
I feel the nissan 3.0TD is OK as a 4WD whilst not towing but this tweeked up motor is working it's butt off towing and the margins for overload are extremly thin. Especially with an auto box as I have. Some of the torque is lost in the gearbox & the donk has to work even harder to deliver.
My mistake for buying it..
cheers
Don
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Follow Up By: Chaz - Monday, Sep 25, 2006 at 22:58

Monday, Sep 25, 2006 at 22:58
Sorry Don, but I have to comment here. You don't loose torque with an auto, you gain it. But you do sacrifice power in the process. Hence.......torque converter, but the problem is that auto's tend to run higher exhaust gas temps because they run under a constant load longer. The problem when you tow a heavy load is that your converter slips so much more and this doesn't help. That's another reason why Nissan down rate the auto's towing capacity. All these problems go away when you lock the torque converter.
Chaz
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Follow Up By: Donald A - Monday, Sep 25, 2006 at 23:21

Monday, Sep 25, 2006 at 23:21
Chaz, Thanks for your comments. The reason I mentioned the loss of Torque is quoting what Nissan say in their shiny Brochure comparing both transmissions for the 3.0ltr TD.
354 NM on Auto & 380 on Manual @2000 rpm. Not the potential of a torque converter.
cheers
Don
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Follow Up By: Chaz - Tuesday, Sep 26, 2006 at 08:19

Tuesday, Sep 26, 2006 at 08:19
Sorry Don, I misunderstood what you were saying.
To my knowledge, Nissan bumped up the torque on the GU4 manuals to increase clutch life.
If only they made the 4.2 in auto!
Chaz
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Follow Up By: RosscoH - Tuesday, Sep 26, 2006 at 12:36

Tuesday, Sep 26, 2006 at 12:36
Chaz,
They do make a 4.2 lt Auto GU, but the dumb Nissan shiny bums won't bring it into Australia, There are plenty of them in New Zealand, But under Australian import laws you cannot even bring one in privately.
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Follow Up By: Truckster (Vic) - Tuesday, Sep 26, 2006 at 12:45

Tuesday, Sep 26, 2006 at 12:45
NZ is the only market to get them.... IM in process of converting my TD6 to Auto..
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Follow Up By: Member - Captain (WA) - Tuesday, Sep 26, 2006 at 12:50

Tuesday, Sep 26, 2006 at 12:50
Offtrack- piston temps in diesel engines are way lower than petrol engines, whatever their kw output. Thus piston materials exist that can easily handle any temp a diesel can produce. Now whether Nissan chose to use it, well thats another question.

Don - Not sure why you say the 3.0TD is no good for towing (apart from reliablity, but i don't thnik thats what you were referring to). I have towed with many a different vehicle and the 3.0TD would have to rate as one of the best. When coupled with an auto, there are few 4WD's i would rather tow with, but each to their own. As Chaz says, lock the convertor and solve the auto box heating issues. As for the difference quoted in torque for the manual/auto models, the series IV manuals run a different ECU program.

Cheers

Captain
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Follow Up By: Off-track - Tuesday, Sep 26, 2006 at 15:44

Tuesday, Sep 26, 2006 at 15:44
Actually cyclinder temps are higher in a diesel than a petrol engine.
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Follow Up By: Chris & Debbie - Tuesday, Sep 26, 2006 at 17:21

Tuesday, Sep 26, 2006 at 17:21
If i remember correctly diesel cylinder temps are more that twice that of a petrol engine.
It is in my opinion that a lot of these failures could have been prevented and would also give people a piece of mind if they fitted at least a turbo boost gauge and preferably a exhaust temp gauge as well, these gauges should be fitted as standard on all turbocharged diesel engines. From what i have been able to find out these piston failures are due to excessive boost which can occur at times of high load (computer hiccup?) as has happened in this instance, if a boost gauge was fitted and high boost was notice just backing off slightly probably would have avoided the failure.
Again just my opinion.

Chris.
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Follow Up By: Member - Captain (WA) - Tuesday, Sep 26, 2006 at 20:25

Tuesday, Sep 26, 2006 at 20:25
Hi Off-track and Chris,

I will stand corrected on actual cylinder temps as found I am wrong. As peak diesel exhaust temps are up to 200C lower than petrol and I must admit I made the assumption that this would correspond to cylinder temps (had also read it in another forum post before)

After a bit of net research, diesel temps are ~2500C @ 10 atms while petrol temps are ~1000C @ 5 atms. Just a bit of difference!!! Thus while peak cyclinder temps are much higher in diesels, actual exhaust temp is lower due to the big difference in pressure change during exhaust stroke.

Thanks for correcting me, one really does need to sort the wheat from the chaff on a forum!

Cheers

Captain
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Follow Up By: Off-track - Tuesday, Sep 26, 2006 at 22:00

Tuesday, Sep 26, 2006 at 22:00
'Wheat from the chaff', I like that one! Nah it's not like any of us have all the answers in this place - otherwise we would be known as the Oracle and be paid a crapload more then we do. :-)

Chris - the engine should be built well enough to not have to fit and monitor extra guages to prevent it from performing outside its safe envelope.
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Follow Up By: Chris & Debbie - Tuesday, Sep 26, 2006 at 23:23

Tuesday, Sep 26, 2006 at 23:23
Off-track - agreed, but people fit all types of gauges to monitor their engines just incase, such as a temp gauge, you should not have to monitor coolant temp either, but do. The suggestion was not made for the gauges to be used to keep the engine from going outside design limits but to monitor engine parameters incase of a problem with the boost control system.

Chris
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Follow Up By: Off-track - Tuesday, Sep 26, 2006 at 23:36

Tuesday, Sep 26, 2006 at 23:36
Yeah sorry mate I agree that fitting these gauges can help prevent these problems but what I meant was that a manufacturer should not sell an engine that has these limitations in the first place. As long as it is operated within the rpm and water temp boundaries it should be able to perform reliably. btw I am not singling out the 3.0TD but generalising across all brands and sizes.
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Follow Up By: Chaz - Tuesday, Sep 26, 2006 at 23:45

Tuesday, Sep 26, 2006 at 23:45
Just another comment on this thread. I have a boost and EGT gauge fitted to my 3.0Di and under high boost the exhaust temp drops. I wouldn’t have believed it, but it’s a fact! There are two things of concern relating to high EGT’s and that is the reliability of MAF sensors and EGR valves, that I believe contribute to these failures. It’s interesting to note that some people that have had them fail, also reported that they blew intercooler hoses off prior to the big bang. A sure sign of over boosting.
Chaz
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FollowupID: 455122

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