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nissan
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Discussion Starter #1
Let me pre fix this with; yes i have used the search function a bunch and done a lot of reading and researching but sometimes you just need to ask the question yourself to get the answers you're looking for.

So, Do i really need to do the NADS mods on my 2012 GU? It's done about 65K clicks, doesnt blow any smoke and runs quite smoothly.

I don't like messing around with modern engines too much and would hate to try and do something to benefit the engine that ends up hurting it because i've done it wrong.

The only part of the NADS i have seriously considered is the EGR block with a hole drilled in it of course as mine is the CRD. But even this I'm skeptical about as i would then have to get a scangauge just in case it starts going in to limp mode and i need to clear fault codes.
The daws and needle is too finicky of a job for me i think and a lot of the info i have read just confused me. The mechanical knowledge i have is simple old school piston engines and big turbine aircraft engines so stuffing around with delicate boost voltage settings will just stress me out more then anything haha. (I'm more of a mallet man rather then a scalpel man)

So I'm just looking for a simple to understand no bull answer. If i look after my Patrol and drive it like its supposed to be driven, will everything be ok or will it spontaneously combust like a lot of the info on here suggests?
 

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Well I'm no mechanic and have wrestled with this same question myself, I have a 2011 crd with 40 000 klms. Through the camping and 4wding I do I have met quite a few people now with crds that have well over 200,000klms on them (and one with 330,000 klms) and all have been completely stock except for a snorkel and in some cases an exhaust upgrade. For this reason (and my car is still under extended warranty) I have chosen not to tinker with mine at all, except for possibly a 3" exhaust. With my serious lack of mechanical ability I'm just worried that once I start tinkering with things one thing will lead to another and I really dont know what I'm doing.
 

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righto, i dont have a zd/crd but i can understand your dilemma.
i think the best part about the nads is that it gives you a better understanding on how the engine works and if something happens you have a fair idea on whats going on and how to fix it.
Countless people come on the forum asking the same questions all the time and generally the guys on here a WAY more knowledgeable than most mechanics when it comes to these engine, why so you ask, well thats because they just about know every inch of vacuum hose, ideal maf voltage, correct boost and egt levels etc etc.
The amount of times you hear guys say 'my mechanic has said my turbo has failed' or 'blown up' only to find out its a crook maf or vacuum leak is crazy.

You cant blame people for not wanting to know as it does seem daunting at first and sometimes the more you know can get you into trouble when modifying, but i still reckon guys with zd/crd should know as much about them as possible.
Give it a go Middo, other wise that logo next to your name may come true ;)
 
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just a good guy.
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i have a 2009 zd30 crd and has 220000 kms and no mods to engine at all . is still the same as the day it came out of the dealership and has a full service history . personally i would not touch it but i have fitted a scangauge and they are worth having. the kms are mostly highway driving as has been used as an escort vehicle. i am the second owner.
 
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Y2KGUII ZD Wgn
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Simcoe is spot on, we hear a lot of bad advice being given by so called mechanics who don't understand the ZD30, DI or CRD. The upshot is, if it was a DI I would say yes, but seeing as it is a CRD with the more sophisticated ECU (not always a good thing as our ECU's are a lot more forgiving than the CRD but not tuneable/flashable like the CRD). Where the NADS comes in is when you start to modify things like a big exhaust and EGR block. Both of these have good performance enhancing traits, the EGR stops the crap from building up in your throttle body and man have we seen some crap in them, but this can sometimes play a little bit of havoc with the boost and it's configuration through the vacuum solenoid, sometimes necessitating the Dawes and Needle to regain control, not always but it does happen, we have many CRD owners on here who would not be without them.

So, if you want to drive around in a std truck then there is no need for NADS on a CRD (but you can't get away from a catch can, whether you make it yourself or buy one, they are a must).

My 2 cents worth.

Throttle body, and this isn't even a bad one, I've seen them with just a very small opening remaining. This is not just restricted to Nissan either I have mates who work with exotic brands who have the same issues.


Throttle body 1.jpg
 

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Discussion Starter #6
Awesome. Thanks a bunch for everyones completely logical and helpful answers.
It's refreshing asking a question as a new member and getting actual answers instead of the usual "use the search function" responses.

Will definitely chuck a catch can on. Then i might look in to getting a scangauge. Maybe if i am able to actually see what my boost is doing then it might give me a better understanding of whether i need to do some NADS or not.

Cheers guys.
 

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Y2KGUII ZD Wgn
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Awesome. Thanks a bunch for everyones completely logical and helpful answers.
It's refreshing asking a question as a new member and getting actual answers instead of the usual "use the search function" responses.

Will definitely chuck a catch can on. Then i might look in to getting a scangauge. Maybe if i am able to actually see what my boost is doing then it might give me a better understanding of whether i need to do some NADS or not.

Cheers guys.
Ed Zackery
 

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Can one just fit dawes valve without the need for needle in the CRD.

Or is both at the same time?
 

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I was in much the same situation as you T.middo.

2007 CRD, didn't know where to start (or if to start!)

I ended up getting a ScanGauge and pyro in. I watched that for a few months. Then decided I'd throw the EGR block in and see how the boost went.

Have had no problems with any of the numbers so happy days.

I think if the EGR had of caused problems I was going to pull it back out and research before deciding on Dawes/Needles etc.

I spent a long time researching and procrastinating so my advice... take your time.
 
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