3.0lt GU Patrols - Grenade Facts

[threedogs]

anything after 04 you should be right but plenty here with earlier and going fine just do it.
too many get Paranoid over it, Since Ive been here only 2 have gone boom and one was a Cr.
more talk I think

[apalsson]

For me the jury is out on a larger intercooler, do you get $800 worth of extra cooling[lower EGTs] over a tigged OE one, you decide
I think its $800 I could spend elsewhere, but that's just me

I agree with 3Dogs on this one. My old Patrol was a 2001 model, bought new and modified for outback work. That car was heavily used for some hard work including towing, first an Ultimate Offroad Camper and later a Supreme Getaway offroad caravan.
I did around $140,000 - 150,000Km in 2 1/2 years, including some 55,000km outback. This car never let me down which I mainly attribute to:
1. Maintenance: I faithfully had the car serviced as per Nissan's maintenance schedule every 10,000Km and if I did any hard outback trips, replaced all oils after 5,000Km
2. Cooling: My Patrol had a Nissan bulbar and a low-mount winch. I always made sure there were no restrictions to airflow in through the front grille. May of the cars that have blown engines have had high-mount winches fitted that partly restrict airflow through the radiator
3. Snorkel: These cars greatly benefit from a well fitted snorkel as it improves the flow of cool fresh air into the engine

Again, I agree with others on fitting the gauges (boost and EGT) to see what is going on inside the engine but have to say I think replacing the Intercooler "just in case" is a heavy handed approach. If there is genuinely nothing wrong with the IC, why replace it.
The $800 - $1,400 a replacement IC can cost you are in my opinion much better spent on other things.

[paulyg]

imho I think the grenade thing is way over rated, any time something goes wrong on a ZD30 they will say its grenaded even if its something else entirely.

[T-roy86]

Hi my 3ltr went bang and am looking to convert it to a 4.2td. The GU 4.2TD is way out of my price range so just windering if anyone has put a GQ 4.2TD motor into a GU. I have heard that the GQ motors are great just wondering if its worth putting 1 in my GU though? Any info would be great thanks

[mudski]

imho I think the grenade thing is way over rated, any time something goes wrong on a ZD30 they will say its grenaded even if its something else entirely.

I agree here mate. Hows this. I got an email from a mechanic who has a 2009 CRD and its holed two pistons!!!! Possibly from an EGR failure. Hows that!!! Block that chit and be done with it.....

[growler2058]

Hi my 3ltr went bang and am looking to convert it to a 4.2td. The GU 4.2TD is way out of my price range so just windering if anyone has put a GQ 4.2TD motor into a GU. I have heard that the GQ motors are great just wondering if its worth putting 1 in my GU though? Any info would be great thanks

Been done heaps mate as long as it's pre 07

[Glennloo]

Hi all iv got issues with my zd30 serII engine stops after 1hr I'm looking at cleaning the MAF and go from there full rebuild motor was put in 1500 Km ago grrr it's doing my head in . Chin up tho

[paulyg]

Hey Mudski what happens when the egr fails?
How did that make the engine blow? and is that something we should look out for?

[mudski]

Hey Mudski what happens when the egr fails?
How did that make the engine blow? and is that something we should look out for?

From what I was told from the mech that the EGR failed, so it was either an electrical issue or mechanical within the EGR. So I am only assuming that the EGR stayed open too long and increased the cylinder temps way too much and basically melted the piston. Or heated it up so much that it structurally failed. Another reason why we block those bloody stupid things off. Not just because of fouling up the intake alone.
Your EGR is blocked so you don't need to look out for it.
I have wondered if any of these type of threads would exist if EGR's were NOT put on these engines from day dot. There is more than just one factor to a grenading engine, like no egr blocked = high cylinder temps, shitty ECU control of turbo boost = engine having too low a boost level( rather than too high) there for increases cylinder temps again. Mix these two together and you got a big issue I reckon.

[rusty_nail]

thanks for all the info guys, im posting in this tread so i can easily find it and refer to it in the future.