CRD 3L patrol q's

[crabman]

Yo, instead of going though bulk forums, seem to be a few knowledgable people on here so will try my luck (already browsed other forums with no definitive list).

Probably going to trade my Banger in for a boonger 07-09 DX wagon. manual as I have learnt to steer clear of auto's after this pos.

I know the old zd30's were touch and go with the newer ones being better and CRD another step above them with power and reliablilty, but i have heard they still require stuff done, EGR to be blanked off and that dorse valve or whatever it is to be fixed/removed/modified.

Is there anything else that anyone knows needs to be done to them or looked out for with potential buyers?

Seems to be a few ex site or government ones so I would probably be off to a wrecker pretty quick for a newer unworn out steering wheel and some st seats. Will just go for a low 2/3 inch lift with light duty springs and 33's. But with shocks/shock tower spacers to suit a 5/6" lift and spring retainers so it can flex up and put massive cars to shame on the harder stuff :P

Cheers

[mr_mike]

Personally i'd steer clear of mine vehicles, not matter how clean they look the red dust gets in everywhere and the prior sale clean up usually consists of a quick steam clean then the underside gets a coat of black blown on it. Also they get thrashed, people on mines figure its not my car or repair bill why should i be gentle on it. I havent seen this firsthand but i have seen the mine vehicles come thru my work brand new vehicles with less than 5000km and they are pretty much only good for the wreckers.

Jump on Patrol4x4.com heaps of info and one of the best Patrol forums i have found yet.

Suspension wise have a look at Suspensionstuff.com Flexi coils, they claim 6" lift flex but with only 3" coils and by all reports on the forums this seems pretty true but its one of the cheapest 3" kits around.

[crabman]

I know first hand about site vehicles, i raped/been in the car during the rapage many a time lol. going through westide auto wholesalers etc, how could i find out for sure who owned it previous, so i know it wasnt a site.. wont be touching anything over 100k too

unles when i look into it more the 100k service is bs expensive, then will look for one that has just had it done.

will check out that lift for sure

[Passage GT]

definitely avoid the ex mine vehicles but the crd's don't have any of the problems the early zd30s did, blocking the egr is good to lower egt's etc,
jump onto http://www.patrol4x4.com/forum/ and there will be literally nothing you could ask that hasn't already been answered in detail.

[MR GMH]

I have a 2008 GU 3.0L. You need a dorse valve to stop boost spike

[Lozzle]

Hey dude, the odd good condition ex-miner comes through the govt auctions (Pickles and/or Fowles) but it's pretty rare I see a decent one come through. Decent meaning sound of both panel and mechanical condition.
99% of them will have some sort of undercarriage damage from flying over rocks and taking damage, they're treated pretty rough. They DO have to be repaired to road worthy condition to be certified for auction but having said that, you never know what might go bang when...

[Passage GT]

I have a 2008 GU 3.0L. You need a dorse valve to stop boost spike

the crd's use computer controlled boost and don't go over 15-16psi, many people on patrol forums have tested it, general concensus is you don't need a dawes valve on the crd engines.
most people still do a egr block and catch can though.

[joshg123]

I would reccomend a dawes valve either way, the early zd30's were 'meant' to be computer controlled also.

Im reccomending all my customers with ZD30's have catch cans fitted, all customers are reporting a positive change in fuel economy afterwards also.
We just finished rebuilding a navara zd, cracked the exhuast port and poured coolant into the exhuast manifold.

End of the day though, they are a overworked 4cyl diesel in a heavy chassis.

[MR GMH]

the crd's use computer controlled boost and don't go over 15-16psi, many people on patrol forums have tested it, general concensus is you don't need a dawes valve on the crd engines.
most people still do a egr block and catch can though.

Well my one was boosting to 21psi sometimes so i would say you need one. Egr block is good to but still need a small hole in plate or the engine light will come on sometimes

[crabman]

You recommend the egr block aswell Josh?? I guess any old basic catchcan will do for them or are there purpose made decent ones with seperators installed available? I found cross-country coolers to a nice topmount for them with a thermo.

[Butcher]

Ive read in a 4by mag that these CRDs really dont like poor quality fuel? Something about the diesel pumps being run at a higher pressure they have a tendency to lunch themselves a 1000km from the nearest town. Seems that for 99% of owners it isnt a problem as they stick to major regional centers (high turnover in fuel) when touring but people that have done the canning stock (topped of in bumfuck)route have come a cropper and needed to be towed out.

[Passage GT]

there's one guy that lives here in wickham that got a bad batch of fuel in canarvon, apparently their tanks filled with muddy water from floods and they still sold it... was $7500 in repairs that his insurance company luckily covered, basically and entire new fuel system, however since the fuel system renewal he's noted much improved fuel economy
fuel economy is hugely varied amongst owners, very weird though nissan of course don't acknowledge it

[crabman]

Yeah, wouldnt trust standard fuel filtration and water seperation with a common rail.. I will put another water serator and a 1 micron fuel filter on it so i worry no more about that side of it.

Fucking common rail junk :P

[Passage GT]

yeah give me a td42t anyday of the week, except an st-l with less than 80,000km cost more than a brand new crd does lol

[markdett]

I work for nissan. The main problems we have with the new CRD's is people running dodgey fuel. The injector pumps internals on the new CRD run in very tight clearances so good fuel is a must. Most cases the pump will over pressurise the common rail and cause its pressure relief valve to 'blow off'. With each blow off the rails pressure releif valve gets weaker and weaker (to the point it needs to be replaced). The injectors are also prone to becoming damaged when dodgey fuel is used and those bad boys are big $$$. Blocking off the EGR on a CRD will cause the engine light to come on as it monitors how much exhaust gasses are recirculated. Once the reading gets too low, on comes your engine light.m I've rebuilt 5 maybe 6 boxe's in the CRD's for crunching gears (mainly 4th) but if withing warranty, its usually covered (unlike fuel contamination) Hope that gives you a little insight.

[Brett_J]

Yep shitty fuel is the biggest killer of CRD systems, Like mentioned good quality 1 micron filter changed regularly will help too. I'm not sure on Passenger vehicles, I know on heavy machinery once you undo anything on the high pressure side it needs to be replaced, especially with rail pressures exceeding 30,000 psi these days.
CRD has some awesome technology coming out in passenger vehicles soon, I've just done a week long course on Diesel injection, have another one on Timing Diesel injection n shit coming up, interesting shit.
The old cam operated/ hydraulic setups are finally being outdated across the board, thank fuck.

[DRKWRX]

not much you can do about shitty fuel? or is it more out in the country towns?

[Brett_J]

not much you can do about shitty fuel? or is it more out in the country towns?

Pretty much just make sure you change your filters regularly and use good name brand ones that filter to 1 micron. You notice it more in CRD's as they run high pressures.

[markdett]

also NEVER use boideisel. I got a new common rail course commin up next week for the new 550 V6 turbo deisel navara. Should be pretty interesting!