October 4X4 mag , Patrol test

Submitted: Monday, Sep 08, 2003 at 16:02
ThreadID: 7106 Views:1480 Replies:7 FollowUps:6
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Have any 4.2 diesel owners read the latest tests for the 3 engines.
Do you think the heat the engine generates working it in sand is much
of an issue , and if so what would be the best remedy. besides bigger
rad. Does a 3 inch exhust pipe help ,
I believe not letting an engine overheat is one of the most important
things you should make sure of. So having the new 4.2td intercooler
engine I want to look after it . What expirence do other 4.2 owners
have

Thanks
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Reply By: Truckster (Vic) - Monday, Sep 08, 2003 at 16:26

Monday, Sep 08, 2003 at 16:26
The new 4.2 has the bigger 4.8 radiator in it, you cant go much bigger!

Exhaust wont really help, was that in Toyota Monthly mag?? Or the one that calls a BMW a 4wd of the year?? LMAO!
AnswerID: 30457

Follow Up By: Member - Bonz (Vic) - Monday, Sep 08, 2003 at 17:28

Monday, Sep 08, 2003 at 17:28
4x4 I think not Toyota X Toyota Monthly but the results the sameSo many places to go!
So much work to do :0(
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FollowupID: 21499

Reply By: the shed guy - Monday, Sep 08, 2003 at 17:27

Monday, Sep 08, 2003 at 17:27
The ni$$an has always had an overheating issue, this is why ARB didnt do a high mount bullbar for the GU model.

The intercooler should help, and the larger radiator, but the main thing is for the driver to keep an eye on the guage, if it gets hot, let it cool, and proceed.
AnswerID: 30469

Reply By: squiz - Monday, Sep 08, 2003 at 18:27

Monday, Sep 08, 2003 at 18:27
The new Patrol 4.2 does have the same rad as the 4.8.
4X4 Australia says the 3.0 litre rad is 50% bigger.
When they were testing the 3 engines in beach
sand , they said the temp really climbed in the 4.2
It didn't overheat , but it was a concern.

Also the new 4.2 recirculates exhust gas , I guess polution
control. Which is the one bit of electronics on the engine.
It has a throttle position sensor.
AnswerID: 30478

Follow Up By: Old Jack - Monday, Sep 08, 2003 at 22:27

Monday, Sep 08, 2003 at 22:27
The EGR actually reduces the temperature of combustion by adding a small amount of inert gas back into the combustion chamber. it is very common on more Modern deisel engines. the EGR is only open under certain running conditions. The new 4.2 motor also has electronic injection timing control to improve reponse & emmisions, from memory the last version GU injection timming is retarded slighlty compared to the previous model for emission control reasons, the newer version with the electroninc control varies the timing slightly.

as for the inter cooler they actually add to the engine heat load as more oxygen + fuel equals more heat, hence the upgraded radiator and the EGR!

Having driven the new version 4.2 after the older one the engine response is better even when cold, on paper the power ouput is nothing to call home about but it's drivability has been improved enough to be noticable.

next more is to go 24valve overhead cam then the tojo boys would have to really watch out!

happy travelling

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FollowupID: 21543

Reply By: Member - Tim Nivo - Monday, Sep 08, 2003 at 21:41

Monday, Sep 08, 2003 at 21:41
Although I have heard of other 4.2tds having an overheating problem, I believe it is a reasonably isolated problem. My 99 cab chassis has only overheated once, when the radiators were chock full of grass seeds. After proper cleaning (had to be pulled out), guage has not moved off middle again (except when cold). This period has included the canning in october which was pretty hot. I also read the article on the 3 nissans, but personal experience shows the 4.2td to be a very good and reliable motor, as was the conclusion of the journo who wrote the article.
AnswerID: 30499

Reply By: duncs - Monday, Sep 08, 2003 at 22:10

Monday, Sep 08, 2003 at 22:10
I had an overheating problem with my GQ TD4.2D with aftermarket turbo.

I tried lots of things including keeping a very watchfull eye on the guage. What fixed it was careful tuning of the fuel system by some one who really knew haow to get the best out of the pump and motor. The pump was not just set to the factory spec but everything was tuned together. No more problem.

Too much fuel can be just as bad as too little.

Duncs
AnswerID: 30507

Reply By: GUPatrol - Tuesday, Sep 09, 2003 at 11:40

Tuesday, Sep 09, 2003 at 11:40
I have had my 4.2TD GU for four years and 150000kms and much of that off road, outback driving, Simpson desert etc.
Never ever overheated.
I don't know how the journos got to the conclusion that the 3.0L has 30% more rad capacity, the readiator in the 3.0L is the same as the 4.2 Series 1 and 2 and the series 3 4.2 radiator has been upgraded to be narrower but longer (same as the 4.8
Will
AnswerID: 30562

Follow Up By: Member - Roger - Tuesday, Sep 09, 2003 at 19:51

Tuesday, Sep 09, 2003 at 19:51
My 4.2 tows a 1.8t van in the hottest climates and the guage does rise if pushed but I have found that with reasonable driving even on sand the heat will stay within safety bounds. However if you see the guage rise turn off the air con and drive more sedately and things will cool down.
Better still just stop lift the bonnet and have a cool drink whilst enjoying the scenery and let everythig have a break.
RegardsDodg
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FollowupID: 21660

Reply By: JohnZA - Thursday, Sep 11, 2003 at 21:47

Thursday, Sep 11, 2003 at 21:47
I was going to start a new topic but came across this one so i thought i'd ask the question in this.

I'm buying a brand new nissan Patrol TDi next month. I'll need it to tow my boat (approx. 1.6 tonnes), i'm leaning towards the 4.2TDi, is it worth the extra $6-8K to the 3.0TDi? What are you thoughts?
AnswerID: 30826

Follow Up By: squiz - Friday, Sep 12, 2003 at 08:40

Friday, Sep 12, 2003 at 08:40
For me It came down to how long I planned to own the Patrol.
If you are leasing get the 3.0.
Also with a bit of talking you can get the 4.2 for about 5 grand
more.
Best of luck

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FollowupID: 21856

Follow Up By: JohnZA - Friday, Sep 12, 2003 at 10:47

Friday, Sep 12, 2003 at 10:47
Thanks for the Reply squiz.

I'm not leasing, buying outright.

From all reports on this forum, the 4.2TDi is the way to go due to the 3.0TDi having all those problems. Then I read that all has been fixed with the GUIII, so now i'm confused. What do you reckon? 4.2TDi or 3.0TDi.
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FollowupID: 21862

Follow Up By: squiz - Friday, Sep 12, 2003 at 11:36

Friday, Sep 12, 2003 at 11:36
I agonized for a couple weeks and picked the 4.2.
Mainly because I plan on keeping it 10 years.
And from past expirence engines that don't make torque
down low make you use more clutch when towing a trailer.
It was an easy decision in the end. I'll stick to what I bought.
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FollowupID: 21866

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