What does the butterfly do by the way? And why can you remove it without trouble when the EGR is blocked?
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What does the butterfly do by the way? And why can you remove it without trouble when the EGR is blocked?
Hi guys , I have a 04 zd30 and wanting to fit scangauge and Dawes valve while blocking my EGR where can I buy these???? Cheers
Don't think the scanguage works on the Di Z30 only the later CR.
Check in archives via search engine top rhs.
I've just purchased a OBD2 bluetooth diagnostic thingy
Will be posting if works or not.
I'm sure someone has a simple diagram of the egr system somewhere. I don't, so bear with me.Quote:
Originally Posted by OhBugger
The idea of the egr is feed some of the exhaust back into the intake of the engine (normally clean air). In doing so it skips the intercooler (why?! Wouldn't it need a bit of cooling?) and goes straight into the engine. The butterfly valve blocks off the air from the intercooler, so the exhaust has preference to the good turbo air, in a way.
Since the ecu's controls the butterfly valve and egr valve, (and doesn't know when the egr is blocked) these valves will still go through the motions as required by the ecu. When the egr is blocked the butterfly valve isn't needed to stop air coming in via the intercooler. So the plate inside is taken out. (And the remains still work as requested by ecu).
Tipsy-tap
Thanks for clarifying!
What a great read this thread was, just got a crd 07 model ordered the scangauge, got me convinced to do the mods to it reading this thread, also thinking of fitting the steinbauer chip, any suggestions of a good gauge set for the pillar pod for boost and temp?
Cheers Illya
Hey this is great info is it pos to block the EGR on a 4.2 what will this do if anything to engine?:beer:
It will give you a quicker spool up, while it also prevents all that carbon going back through the engine, hence, longer life.
Cheers, the ferret.
Thanks the ferret your EGR plates will they fit the 4.2?
Hi Ferret do you really need to clean all the gunk off? wouldn't it burn off?
or thats not possible with the EGR blocked bypassing it
Yep perfect fit, they are slotted so there is no need to pull it all apart.Quote:
Originally Posted by patrolrulz
Cheers, the ferret.
http://i608.photobucket.com/albums/t...rret/42pic.jpg
That would be like sticking a band aid over a cut without cleaning it first.Quote:
Originally Posted by threedogs
It's best to clean the inlet manifold as best you can, along with intercooler etc.
The cleaner, the better.
Cheers, the ferret.
Okey Dokey Took the intercooler off last week to clean and it was dry as with no oil at all,
thinking not bad for 185,000K, I'll check the throttle body as well next weekend ,thanks
does the td42 have a egr valve,i cant see one on my old pig?
The early 4.2s had no EGR system, probably why they last so long lol
Cheers, the ferret.
mean,cheers ferret
Hey guys I have a 05 gu sts thinking of blocking the egr but not until I get gauges fitted where abouts is this other valve your taking about to drop boost if it spikes after the plate is put in?
And also when cleaning the intercooler hoses what else should be cleaned
Sorry new to a Nissan not much knowledge
Is this mod only applicable to turbo models or can it be done on naturally aspirated models as well? I have a TB42S running on dual fuel system (petrol/gas)
Common mod to all turbo diesel
So should it be done on naturally aspirated petrol/gas models or not?
My opinion is that any engine that has EGR, it should be done away with or blocked.
Blocking the EGR on your NA TB42 shouldn't be a problem, you just need to convince the ECU.
Cheers, the ferret.
Only heard being good for turbo diesel only, but PM the Ferret
Thanks John, I hope you are feeling much better too by the way.
I think as said a moment ago, you don't need the crap buildup in any engine if it contains carbon from the exhaust, petty or diesel.
Cheers, the ferret
Up date in Heres Johnnie
Question; After reading all the negative comments on here regarding EGR, I find I must ask the question, are all DIESEL powered vehicles today fitted with this system ?
I KNOW, my 2006 ST I 3 liter Patrol IS, I also KNOW my son's 2000 Toyota Prado is also fitted with EGR, I also KNOW my mates Puegot sedan 2004 is also fitted with EGR, therefore the question I have for all posters on here,
IF, EGR is the evil it is claimed to be here, for the long levity of our engines, how come all these other manufacturers vehicles do not suffer from this system as it is alleged our Patrols do ?
There are literly thousands of vehicles inculding large trucks running around with these systems fitted in Australia and Europe, yet it would appear, operate perfectly.
Why the disparigity with Nissan Patrol engines ?
Is it just Nissan Patrols that suffer from this system ? Seems a bit strange if it only applies to Nissan .
Of course being a Nissan forum, it is forbidden to mention other brands that may or may not have better designs...
I would be interested in the answer too from someone with more authorita than 'my mechanic mate'
Anyway I remember hearing my mechanic mate saying it does affect other brands too.
Unfortunately because of the grenade issue, everyone is being cautious, walking the higher moral ground - however that applies to engines. Given the way the grenade problem manifests itself, blocking the egr both makes sense, and takes one more factor out of the engine going "BOOM"!
Tipsy-tap
All I can tell you mate, is that the EGR system was introduced as an environmental thing.
Just about every modern engine is fitted with one, even the petrol motors.
Time will only tell if these trucks as you say are operating perfectly as long as they would without EGR.
All engines breathe and earlier engines vented the crankcase to the atmosphere however, the environmentalists in their wisdom decided it was better to burn it.
So what happens is that the carbon and soot from the exhaust is routed back into the combustion chamber via the EGR valve and inlet manifold.
This in itself is bad enough, but add to this an oily vapour from the PCV going also into the inlet manifold.
This tar like paste adheres to the inside of the inlet manifold and after a while begins to restrict the cool airflow to the cylinders.
Now the engine is running on borrowed time due to the extra heat and can cause piston and head failure as well as other damage.
Yes, the ZD30 DI has a bad reputation for grenading, I am inclined to think that the whole structure of this motor leaves a lot to be desired.
It's not uncommon for a TD4.2 to do half a million Ks, even with EGR, but I don't think many ZD30s have.
Blocking the EGR is your choice, I would recommend it, as well as a catch can.
Thankyou for listening.
Cheers, the ferret.
The simple answer is that while all modern diesels do operate with some level EGR, the ZD30 uses very high levels. Peugot do have their problems also as do many other manufacturers, but the Nissan ZD30 was designed to be a very clean burning light diesel and it even won an award back in 1999 or 2000 ( I can’t remember exactly when) for being the environmentally cleanest diesel engine to date and this was due to its M-Fire design and extremely high levels of EGR.Quote:
Originally Posted by itchyvet
If you remove the inlet manifolds or throttle bodies from any light diesel engines you will see similar results, but in most cases the carbon build up is dry which results in less accumulation. Therefore while it’s still corrosive, it doesn’t block the intake manifold runners as severely. In our case with much higher levels of EGR and excessive oil contamination due to a poor crankcase ventilation system, the wet or greasy buildup is much more excessive causing uneven intake air distribution, resulting in uneven fuel mixtures and we all know the result of that.
just going out to do this to mine now.lol
Do the CRD models need this as well?
I'm pretty sure mines blocked 2011 GU
Publicly speaking to a private audience.
Mate, if you could see inside your inlet manfold, you would see what the combination of carbon from your exhaust and PCV vapour does.Quote:
Originally Posted by Franki
There is a lot of reading that can be done to help you make up your own mind on this and other forums with all types of vehicles.
Too much to try and explain here.
Cheers, the ferret.
Hey Guys,
I'm looking at buying an '04 3l patrol which already has a heap of mods (not too sure about this one yet) and id be interested in doing this and fitting a catch can, is a dawes valve needed/recommended with this mod? It already has boost and egt gauges, chip, 3" exhaust etc. Just worried about overboosting and the like. I dont know all that much about engines, although I have learnt heaps over the last few days just from reading through forums so im not complteley incompetent haha.
Any help would be wicked,
Cheers
Gunner
Quote:
Originally Posted by Gunner93
Hey mate seen as you already have the boost and egt you are in good shape, definatley block that egr if not already done. The dawes valve and needle valve should be done without question it will give u alot smoother ride with more response and alot lower egt's
Sorry if its a stupid question but how will they give a smoother ride and more response? Just through having better control of the boost?
The needle valve will let ur turbo spool up alot faster than normal, and you can raise or lower boost threw your dawes and stop any boost spikes
great thread, thanks to all for the info in here. 150K on the clock in my patrol with EGR still active, better start thinking about blocking it soon.
If it's a GQ and everything is still working just unplug it in the engine bay.
Brilliant thread, definitely my next mod!
Just letting you guys know I have Di plates in stock and will have 2.8, 4.2 and Navara ones coming very soon. Also Crd Patrol ones coming in a few weeks.
I tapped that app...