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Discussion Starter #1
I have a 2004 3 litre Patrol. I have been travelling around Australia now for 4 years with my wife and kids towing either a large off road camper or our 19ft full size van. The car has never once let us down (other than a cracked chassis fixed by ATOC) and has been through hell and back. At Christmas I made a few cheap engine modifications that have made a huge difference.

I had a 2 1/2 inch free flowing exhaust installed. No cat/air purifer, just a straight through ceramic coated dump pipe and a straight through muffler. I then put an 8" electric fan on the intercooler sitting on top of an alloy plate with a hole cut for the fan. It runs constantly while the engine is running. I also blocked the EGR, added a Dawes and needle valve, removed the inlet manifold and cleaned out the black tooth paste like gunk.

Now here is the facts. There is a noticable increase in power and responsiveness. While that is nice, it gets better. The biggest improvement is with the EGT. Cruising with the van or camper at 100 km/hr the EGT always sat at around 500-550 (spiking to 600-650 on big hills). Now it sits around 450-500. But the biggest difference is how rapidly the EGT now drops. It literally drops in front of your eyes, just by taking your foot off the throttle slightly.

When we pull up I always wait for the EGT to drop to at least 250 before turning off the engine. That used to take at least 5 minutes to achieve. Now the temp drops to 250 within a minute. The difference is amazing. The intercooler is now only warm to touch after a long run, compared to very hot prior to the fan being installed. I have also noted an influx of butterflies and leaves in the scoop that have never been there before. Clearly we are now sucking in tons more air.

And the very best part is how cheap it all was. Intercooler fan $100-00. Blocking EGR and installing Dawes valve + needle valve, around $100-00. Getting inlet manifold removed, cleaned, new gasket and replaced, $340-00. Yes you could do this yourself but it is a bit of a job. I thought it was money well spent. The exhaust by Fat Pipes in Brisbane cost $550-00. What a bargain. So for a total of $1,100-00 I believe I have a better running engine, and a much cooler engine.

I already have a catch can that catches very little, clean the MAF sensor every 10,000kms, a second fuel filter/ water trap and change the oil every 5,00kms.

I have been adding 2 stroke oil to the fuel at a 200/1 ratio as well as deisel fuel additive for 12 months.
Have I noticed a difference by adding the 2 stroke. Not really but it can't be doing any harm. Any lubrication has to be good.

These are a good truck, and the 3 litre is a good engine. I believe these few mods are money well spent and will hopefully ensure the old girl remains reliable for years to come.

I would like to thank this forum and one member in particular for all the advice, especially regading the EGR block.

Cheers

Grand Tourer

www.followourtrip.com
 

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Discussion Starter #3
Hi

I went for the simple and cheap option. Delphi 296 with glass bowl which I put in the fuel line before the Nissan fuel filter. I change it every 10,000 or even 5,000 if getting fuel from dodgy sources. The elements are cheap at around $10-00 each. There are more expensive water traps with alarms on the market.

Cheers
 

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Nissan Patrol GU4 2006 with Cummins ISDE4.5 270HP , 830 NM Engine Conversion
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note,i was told that the egt gap before and after turbo is not 200 if bigger exhaust installed. in most times, the gap is bigger thatn 250 or more. in this case, the reading of 550, could mean the pre-turbo real temp may reach 850 ( instead 750 without bigger exahust).
 

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Currently in PAD rehab
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Excellent write up, thanks!

Im looking into replacing my exhaust next to keep those EGT's down. It looks like my exhaust has been modified to accommodate my dieselgas LPG tank so ill probably have to get one custom made from the dump pipe back.
 

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Hi Grand Tourer,

Did you have all the work done by Fat Pipes in Brisbane or did they just do the exhaust?

Many thanks
 

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Hi

I went for the simple and cheap option. Delphi 296 with glass bowl which I put in the fuel line before the Nissan fuel filter. I change it every 10,000 or even 5,000 if getting fuel from dodgy sources. The elements are cheap at around $10-00 each. There are more expensive water traps with alarms on the market.

Cheers
Great write uip Grand Tourer, glad to read that you are enjoying this wonderful country of ours :)

I would strongly recommend that you install a lift pump with your setup if you do not have one already. The Injection pump on that model is not specifically designed to lift its own fuel and as it uses fuel for cooling, it is very prone to failure with any obstructions in the fuel line (dirty fuel filter / second fuel filter) or with air getting into the fuel line as well :(

Have a read of this thread on the subject, it shows an install of a Facet then a Holley Red with a check valve across it to ensure that the IP can still suck fuel if the red fails. It also shows how to re-route the Injector Spill line from going into the inlet of the IP and being repositioned to the outlet of the IP which goes back to the fuel tank.

You will be pleasantly surprised with the results of this mod as well, more power and slightly lower EGTs comes to mind :)

If you do not want to install the lift pump, there is another option for the CAV housing as per the Sediment Bowl installation thread.


Cheers,
Whitie
 

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Discussion Starter #8
Hi Grand Tourer,

Did you have all the work done by Fat Pipes in Brisbane or did they just do the exhaust?

Many thanks
Fat pipes just did the exhaust. Value for money- Excellent.
I did all the rest except for removing and cleaning the inlet manifold. Once you work out what goes where it is actually fun.
 
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