Blocking the EGR Valve

[the evil twin]

That's good mate, took ya time eh?? you should notice that it spools up about three to four hundred revs earlier. Keep an eye on the boost tho, you may need to fit a manual boost control.
have you removed the butterfly and cleaned out the intercooler and it's hoses? this is very important as part of blocking the EGR. is yours a 3L, 2.8 or 4.2? Next thing is to run it on 200 to one two stroke, you will notice better fuel saving and a quieter motor, cheers Rod.

Hiya Cobber,

Spool up, Yes, def earlier but OK for what I do.

Boost, definitely, thought the VNT adjustment would take care of it but not quite good enough so Dawes Valve required I reckon

Mines a CRD... but it must be busted 'cause I get bugger all oil in the Cooler or Hoses, well, bugger all worth worrying about. MAF gets cleaned and tested every 20.000K's anyhow

Again being a CRD (not that you knew that when you posted) I don't think the 2T will make a lot of difference. Most of the other CRD Jockeys reckon its not noticeable prob 'cause the Fuel System is designed for lo Sulphur fuel. Would be nice tho, jeez a CRD engine is a noisy basket isn't it. Any of 'em not just the Nissan's

If the P0401 Code gets to be a PIA I might drill the plate but as we discussed at the show that partially defeats the purpose of the block in the first place

[the ferret]

There have been a few put a 2.5 mm hole, but I think it defeats the purpose of blocking as you say, the main idea is to keep all of the crap out of the inlet manifold and hence the combustion chamber. I don't think 2 stroke would hurt the motor, but that's my opinion. cheers Rod.

[patroltrav]

Gday guys just wondering if anyone has pictures of the EGR on a crd motor? Also does anyone know if the patrol has a boost reference for the scanguage to display? Do you need to do the dawes valve mod if you block the egr on the crd engine? I am hoping to improve my fuel efficiency to anything better than 17-18 L/100 klms.

Cheers

[the ferret]

here ya go, you will need to research the technical info as I don't supply it , sorry.

[the evil twin]

Gday guys just wondering if anyone has pictures of the EGR on a crd motor? Also does anyone know if the patrol has a boost reference for the scanguage to display? Do you need to do the dawes valve mod if you block the egr on the crd engine? I am hoping to improve my fuel efficiency to anything better than 17-18 L/100 klms.

Cheers

Scangauge Boost - Yes, it does but it is MAP (Manifold Absolute Pressure). You can put in local Atmospheric pressure to change MAP to Boost but I don't bother as you get used to it quickly.

Fuel Economy - Man that is pretty crappy fuel useage, but there are a few out there with those figures and no-one seems to know why. EGR block should save you maybe 2 LPH give or take

[nowoolies]

Sorry fo the delay Paul, and by the way, thankyou for your call today, much appreciated.
What model Nissan? cheers Rod.

g`day Rod
hope alls a bit better now mate

ive got a late 2009 gu 4cyl, im just going through Nissan at the moment see what they come up with hahaha proberly wasting my time ,

anyroad . ill let you know shortly what they come up with then ill set the bus up with the plate and other fittings that im learning about ,strewth more than i thought blocking the valve, but the lads here certainly know their stuff ,
sooooo glad i found this site
i would like to get a light mount for the rear of the bus as well ,
i could come over and pick it up if thats ok
cheers Paul

[the ferret]

Onya Paul, yeah these things do take a while to settle down. Yours is a CRD, I will need to make the plate for you, let me know when you want it.
I have some single light brackets here but if you're after a double, I will be building some this coming week. Pick up is ok anytime, just ring first, regards Rod.

[nowoolies]

thanks Rod
i take a double please , when there ready let me know please and ill give you a call
cheers
Paul

[lachiek]

Hi all, this is an awesome thread I am hoping will reduce the cloud of black smoke coming out of my GQ 2.8T.

I noticed the template diagram says something like final measurements and results may vary. Can someone please confirm if I make that template it will fit my GQ RD28TD?

Otherwise I might be begging you for a plate Ferret....

Cheers, Lachie

[the evil twin]

For you ZD30 guys an gals esp the CRD's...

Hypothetically if one were to block the EGR which Nissan do not recommend and may cause warranty hassles... I have hypothetically found that the EGR plate will give you about 3 - 4 PSI more boost on no load cruise as per the Bibles floating around the 'net... and as the Ferret has mentioned the spool up is significantly quicker

You will need to adjust the VNT or fit a Dawes Valve... hypothetically of course (cough cough)

As it is the no load cruise hi boost condition that is most susceptible to "Kabooming" the ZD's if the MAF goes faulty I wouldn't block EGR without appropriate gauges/scangauge/ECU talk or equivalents so you can adjust the VNT or Dawes to limit boost and also keep an eye on things.

You will easily see in excess of 20 PSI Boost (34 to 36 MAP) otherwise and if a faulty MAF starts shoving fuel in at that boost pressure then it will get ugly again not my work but taken as described in the GU bible.