Nissan Patrol 4x4 (Africa)

Ross has a great aftermarket turbo system on his 1999 GU Patrol that has done plenty mileage and gives a nice boost in power and torque. He can give you more details as to who did the conversion.

The chaps who did Ross's conversion also did mine.

I've only done around 15,000km with it on so cant really talk about long term effect. Boost very low, so essentially just compensates for altitude.

www.alpinedevelopments.co.za - based in Honeydew, JHB. It is owner run, with the owner having more white hair than Oom Mac he has been in the game very long.

Russ Kellermann wrote:My Mrs just gave me the new Max Ellery workshop manual for my birthday,l for all patrol from 1998 - 2009 . I'll check up on what significant differences there are between the TD42 and TD42T motors, and report back if i find anything.

Russ.... I'll think you'll find that the most significant difference is that one has a turbo, and the other doesn't.........

davejones wrote:The chaps who did Ross's conversion also did mine.

I've only done around 15,000km with it on so cant really talk about long term effect. Boost very low, so essentially just compensates for altitude.

http://www.alpinedevelopments.co.za - based in Honeydew, JHB. It is owner run, with the owner having more white hair than Oom Mac he has been in the game very long.

I spoke to them a while back...they sounded like a really clued up bunch. Unfortunately it's really difficult to get my vehicle up there. Ross's tune makes a big difference down here at the coast. He puts out 115kw and 400NM is I remember correctly (at 0.4 or 0.5Bar Boost). In a straight drag he pulls away from me like a scalded cat....it makes a very big difference when loaded on the hills.

davejones wrote:

Russ Kellermann wrote:My Mrs just gave me the new Max Ellery workshop manual for my birthday,l for all patrol from 1998 - 2009 . I'll check up on what significant differences there are between the TD42 and TD42T motors, and report back if i find anything.

Russ.... I'll think you'll find that the most significant difference is that one has a turbo, and the other doesn't.........

Russ,


I would have to disagree on the comment that the turbo set up on a GQ troll would impact on the engine reliability. My opinion is how you drive your troll and how you maintaine it has a bigger effect on engine life.


My troll got its Safari Turbo and Intercooler fitted at 36k km. It has now got 366k km and engine has never been opened. Power differance is substantial, with number as follows running on 285/75/16's

85 - 89 kW ON WHEELS
357 - 371 Nm

Standard unit was 85Kw and 285 Nm.



Most important addition when fitting a turbo is a EGT Gauge. I what this and never let the temp exceed 620C

I accept that our opinions may differ, thats the beauty of the forum. And, i agree on your comment about maintenance and style of driving. However, one just has to trawl the net to see just how many cases end unfavourably for persons who have turbo'd the 4.2 NA. It is a very few that end up with success stories such as yourself. Any motor can destroy itself, but fitting parts not originally incorporated in the factory design and manufacture will heighten the chance of failure.Thats just how it works. Contrary to belief there are many parts of the Factory 4.2 Turbo and Inter-cooled Turbo (TD42T & TD42Ti) that differ from the factory 4.2 NA (TD42). In most cases i've read, it is these components that have failed, or have been key contributors in the failure of the engine.

The 4.2 is probably the best motor to turbo should one wish to do so, as they are over built and very robust, with huge longevity being a key motivation in the design and manufacture process. However, one decreases this risk of failure far more if the motor is kept at factory spec.

EGT's are , as you said, of highest importance,particularly on steep long hills which may span more than 3-5 minutes of high figures. One idiosyncrasy which baffles me is the point where one has a turbo in order to achieve constant cruise speed up hills for instance, yet they are forced to back off the throttle due to EGT alarm's, setting them back to that of the pace of a NA motor ?

Good day Russ
Like you say:opinions may differ.But I have to add something,maybe fuel on the fire.
I am propperley the last one to say this.Because I lost my motor.
Yes they are strong and can handle a lot even me boosting the thing @ 1.5 bar for 6 months.I changed the boost to 1bar,I got fed-up for pipes that blew off every now and then.Specily when cold whether,the boost guage hit the 2bar mark and then the pipe blew off.The guage where accurate.
I also had a boostcreep problem in the beginning.Foot flat in 5th ,the boost just went up and I lift off @ 2bar.On a nice day I tried to test the top speed on my whay home from a camp weekend.(without the caravan)I hit the 190kph on the speedo and the boost blew again a pipe off.Any whay what I am trying to say I drove the living daylight out off the thing.
So I decided to open the Engine and make it fresh,remember my turbo were custom made by me.My enjine where a NA model.
O yes the first 6 months I ran without a intercooler with that high boost.
So I made it fresh after all the abuse and fitted a intercooler and manage to settle the boost @ 1 bar.The egt's where never higher than 680deg,even when I abused it.
I allso ran the car with a trailor across the Namib in the middle of their summer foot flat,and never lifted for high egt's.I had to lift for heat of the water,yes.And only when it hit the red.I rode it through the Namib with the heat guage most off the time in the 3/4.
The day the engine blew,was not because off the wrong boost or high EGT's.The thing over heated.The boost where @ 1bar and the egt @ 610deg.I was driving foot flat @ 160kph with my explorer on tow.I was busy negotiate my way through traffic and never noticed the car over heat.When it blew I noticed the heat in the red.I know the egt's were ok, those guages sit eye level and I remember it because I drove so hard.
Not a nice feeling.
Specily to people that think they know something off a engine and blame the turbo.And by saying this I am not pointing a finger at you.
I am sorry for the broken engine's with hole's in the pistons or melted.They were tuned bad.Probley by people that think they know someting off a engine.Specily a turbo diesel.
Again, I am the last person to have a say about a 4.2 turbo (home made).Just because I lost Mine.
But I lost my engine from overheating and not the turbo.My car ran hot before I fitted the turbo.

For what its worth.The petrol engine I fitted are a plessure.The only problem I had with cooling,the Falcon motor can not take a viscous.A electronic fan are useless.So I fitted a hydraulic fan.This fan idle with the engine and rev with the engine and then when hot or working temp, the fan kick in and make a viscous or solid fan look bad.When the hydaulic in action it make a big noise and blow the dust out under the car.I wish I had this fan on the diesel.
So I tell this long story only to say in my case I could not keep it cool arround the cylinders.But it was perfect ontop off the pistons.
Cheers
Frans

frans, if anyone knows engines, its you. Certainly a lot more than i do. I understand, your turbo was actually running well, set up correctly, and was not the reason for your failed motor.

Im really not saying that it is the turbo and aftermarket tinkerings that reduced many TD42's to failure, however, when one looks across the broad spectrum of TD 42 failures, the common denominator is that most were worked on in the form of turbo's, intercoolers, injectors and exhausts . Thats all.
The units kept at factory spec seem to accumulate more km on the odo before seeing top end rebuilds or full rebuilds.

My comments are truly not meant to strike fear into those that have these modifications, its merely interesting vehicle conversation that i learn from at each post from each individual. I have spent many hours, if not days, on the Auzzi forum. There, i read all the turbo mod threads as i find it interesting to see them adjust and tweak their set ups to achieve results they seek. Its a dark art. But it has its place no doubt.

When i started looking for my patrol, i had to choose weather to get the TD42t or the TD 42, both in pick up form. I had previously owned a 2x turbo vehicle (1 x SFA Hilux 4x4 with import 2.2 motor which i swapped for a 2.4D NA after the motor seised , and an isuzu 280DT 4x4, which had given us 280 000km with not a single worry. Everything on that turbo was still in mint condition and never did my motor overheat , burn pistons, or fail. the only things replaced were units like water pump and starter motor.) Yet, i decided to purchase the NA patrol, why, because i wanted to minimise my risk to the N'th degree. So you see, i am the type that worries more than most. The irony is that many times i wish i had purchased the TD42t, even though it only runs at 0.4 boost, but then on the other hand, i like the simplicity of a NA motor.

These conversations make for great reading and learning.

thanks for all yours, and everyone else's unique stories and responses.