V8 Diesel or 4 Cyl?

Submitted: Monday, Sep 20, 2010 at 18:04
ThreadID: 81445 Views:9183 Replies:11 FollowUps:27
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I have been contemplating getting a Brunswick Diesel conversion done on the old '98 patrol wagon. The concept and idea really sound attractive, but is it worth it?
Compared to the 4 cylinder makes out there these days, i am led to believe that they are able to pull just about anything a V8 Diesel can pull...?
I mean don't get me wrong, my old GU has pulled our CYT camper trailer to cape melville and back through sand and bull dust and she just pulls like a tractor.....all be it painstakingly slow. But pull like a tractor none the less!
I guess i am looking for a bit more get up and go around town, and this is where the old girl is a bit sad. (camping days are far and few between these days with kids' commitments etc.)
So...! A 6.5 liter Diesel and a 4 Cyl diesel will be able to get me around town a lot quicker, but which is the wisest way to go?

thanks in advance for any advice/thoughts.
John
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Reply By: Member - Paul F (INT) - Monday, Sep 20, 2010 at 18:21

Monday, Sep 20, 2010 at 18:21
Hi John.
Would suggest you take a look at post No 81427 re; "brunswick diesel" it may change your train of thought very quickly.
But in reality what is the sense in having "6.5 litres of grunt" in a 50-60 k zone
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Follow Up By: Member - John S (QLD) - Monday, Sep 20, 2010 at 21:57

Monday, Sep 20, 2010 at 21:57
Paul,

thanks for the link to the post. Yes it does sound a bit scary reading other peoples bad experiences.
And yes your right...why would i want so much grunt when you can only go as fast as the speed limit. But its the acceleration time getting to 60 kph that would be a bonus. Especially when crossing busy roads and roundabouts etc.

John
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Follow Up By: StormyKnight - Tuesday, Sep 21, 2010 at 21:18

Tuesday, Sep 21, 2010 at 21:18
I got to say that I 'only' have 96kw & 343Nm in my auto Prado & it will get you across a street rather quickly for a near 2 tonne vehicle.....dry or wet road since its constant 4WD it doesn't really matter....

However turning onto a highway in a gap in the traffic will show its shortcomings rather quickly :)
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Reply By: Nutta - Monday, Sep 20, 2010 at 18:31

Monday, Sep 20, 2010 at 18:31
To be honest I think my chipped gu 3.0l auto would kick a v8 Chevrolet diesels butt down the quarter!

But when it comes to towing, especially overtaking it can be a frightening experience, gutless as, I dare say the v8 would kill it here.

You really have to way up cost and more so how long you'll keep it for.

Personally I'd keep it simple and go the stocker again.

Good luck either way!
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Follow Up By: Nutta - Monday, Sep 20, 2010 at 18:36

Monday, Sep 20, 2010 at 18:36
Forgot to add, check out patrol4x4.com.
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Reply By: garrycol - Monday, Sep 20, 2010 at 18:36

Monday, Sep 20, 2010 at 18:36
For their capacity the 6.5s are under powered and even torque is ordinary (for their capacity).
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Follow Up By: Member - John S (QLD) - Monday, Sep 20, 2010 at 18:57

Monday, Sep 20, 2010 at 18:57
Hi Garry,

I appreciate your response. Would you be able to tell me if you have experienced this lack in power and torque personally?

John
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Follow Up By: Rockape - Monday, Sep 20, 2010 at 19:41

Monday, Sep 20, 2010 at 19:41
John S,
power is 120kw and mine puts out the same torque as a new V8 diesel cruisert.

They are no race engines and now are getting a little long in the tooth, when it comes to low down torque turbo engines just don't cut it.

In steep country you put a little hand throttle on, about 800 to 1000 revs and point, it just pulls away and doesn't spin a wheel.

Towing and overtaking with a trailer or van is also very easy.

Have a good one
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Follow Up By: garrycol - Monday, Sep 20, 2010 at 21:28

Monday, Sep 20, 2010 at 21:28
No I haven't but I have seen the power curve and torque curves. As I said for its 6,500cc capacity it is a very low performance engine. In absolute terms it is not bad - but poor relative to its huge capacity.
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Follow Up By: Maîneÿ . . .- Monday, Sep 20, 2010 at 22:31

Monday, Sep 20, 2010 at 22:31
"The Hyundai ix35 all wheel drive has a CRDi turbo Diesel engine – the most powerful Diesel engine in its class.
With its 135 kw power and staggering 392 Nm torque.
The engine provides sporty acceleration and agility, with a small car fuel economy of just 7.5 lt per 100 km"

I've driven a ix35 6 speed auto and it was a rocket ship up hills with terrific torque from the turbo diesel engine.

Do I understand the V8 is only 120 Kw ??

Maîneÿ . . .
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Follow Up By: Rockape - Tuesday, Sep 21, 2010 at 05:50

Tuesday, Sep 21, 2010 at 05:50
Mainey
Well if you read it again and again you will see it is 120kw, I hope you understand that.

If you have driven these high powered turbo engines in the scrub you will also understand that they develop their torque a lot higher in the rev range than an old V8 clunker, they don't want to go down low right where you want them to.

I can't even back up a small hill and over my gutter in a certain 3L turbo diesel without wheel spin or stalling.

Gee I even take off in second gear when towing my caravan and I don't find 436nm of torque (dyno reading) from very low revs a problem at all.

Also if you take time to read my reply properly, I just quoted the Kilowatts ans torque as no one had stated them.

Also READ that I stated the engines are getting a bit long in the tooth if you can grasp that.


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Follow Up By: Maîneÿ . . .- Tuesday, Sep 21, 2010 at 06:52

Tuesday, Sep 21, 2010 at 06:52
Rockape,
Yes, I read your reply and yes I do understand the V8 is only 120 kw, that's the reason I've asked the question, (insert really big smile here)

I thought 120 kw from a monster 6.5 lt V8 engine, compared to new 4 cylinder turbo diesel technology, is very, very low.

As I've stated I've driven the Hyundai ix35 variable speed turbo diesel, and it pulls from idle like a bull with it's twin overhead cam, 4 valves per cylinder, common rail diesel injection with electronic control variable geometry turbo engine producing a huge 392 nm torque at just 1,800 – 2,500 rpm.
The ix35 'average' fuel consumption is 7.5 litres per 100 klms, which is reasonable :-)
( I copied all the above techno info from the ix35 website )

Maîneÿ . . .
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Follow Up By: Rockape - Tuesday, Sep 21, 2010 at 09:06

Tuesday, Sep 21, 2010 at 09:06
Mainey,
Thanks for all the info one the latest 2010 enginenagainst a 20 year old engine, guess he will have to cut the front of one of those and stick it in his old Patrol.

Rocket science I see



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Follow Up By: Ozhumvee - Tuesday, Sep 21, 2010 at 13:53

Tuesday, Sep 21, 2010 at 13:53
It's very low for a reason, see which engine is still running in 20 years, There isn't any substitute for cubes.
Ask what the repair bill will be if you get a tank of dirty fuel, the old tech engine will just cough and splutter and keep on plugging along, the new one will stop dead and cost thousands to repair.
Depends what you want it for, shopping trolley, mum's taxi and an occasional fang up the highway go the 4, if you do lots of 4wd touring, towing and/or loaded (overloaded) go the 8. The other question to ask is the length of time you intend to keep the vehicle, if it is regularly changed then the 4, but if you intend to keep it for ten years or more then the 8 might be better. How much can you do yourself?
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Follow Up By: StormyKnight - Tuesday, Sep 21, 2010 at 21:27

Tuesday, Sep 21, 2010 at 21:27
A great little Diesel engine is the one in the mazda 6...

2.2L 132kw/400Nm & continues to pull happily to 5000rpm....

Max torque is from 2000rpm

Albeit the car is a bit lighter than a 4WD but a smaller engine means less weight to carry too....it was actually quite zippy!
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Reply By: Motherhen - Monday, Sep 20, 2010 at 18:51

Monday, Sep 20, 2010 at 18:51
Hi John

Just a hypothetical thought: What is your vehicle worth now? If it is worth $10,000 for the sake of the argument, and you get a full conversion of motor, radiator and gearbox it will be in the vicinity of say $20,000 or more. You still have Patrol worth $10,000 because of its model and age. Fine if it does what you want, but if it gets written off or you have to sell it, you get not much more than $10,000 when you have just added $20,000 to your $10,000 of vehicle.

Cheaper option may well be to trade in or sell it and buy a vehicle more suited to your needs.

Motherhen
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Follow Up By: Member - John S (QLD) - Monday, Sep 20, 2010 at 22:07

Monday, Sep 20, 2010 at 22:07
Motherhen,

I see that you have an F-250. This was going to be another option instead of getting an engine conversion. But i have to say, I test drove one today and was not very impressed. It is a 2003 model, dual cab XLT. It is a very nice looking rig, with everything on it and even had a fifth wheeler conversion done to it. But i found that that the steering was a bit like the old '80's toyotas that wandered all over the road. Also when you put the foot down, there was a lot of noise, but not a lot of response until you "got up on the plane".
Sorry mate i don't mean to have a dig at the Fords, but being this is the first time i have ever driven an F-250, they were the things that stuck out when i drove it. are these things normal? Oh yeah it was an automatic as well. Which is another thing that i have always wondered...how good are automatics in the bush?

John
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Follow Up By: Motherhen - Monday, Sep 20, 2010 at 22:23

Monday, Sep 20, 2010 at 22:23
Hi John

Yes, getting the F250 was a better but dearer for us option than upgrading motor of the Patrol, which still would not have legally pulled our caravan loaded (the 3 litre pulled the van well, just auto only rated to tow to 2.5 t). No problems with our F250 which had only 16,000 kms when we bought it from one very fastidious owner. I am not mechanically minded, but sounds like the one you tried needs a lot of maintenance. The 7.3 litres are all auto, and auto is good in 4wds as it can pick and change gears smoother than i can. The length and poor turning circle is more limiting for bush driving. It had a bit of 'body roll' as did one of our friend's when we went in it, however with ours adding a leaf to the front springs stopped the roll. The F250 doesn't have the finish of the Cruisers and Patrols, but gives a very comfortable ride and is a pleasure to drive (but not a pleasure to park in a crowded shopping centre car park!). If you don't tow a heavy load, you may be better to look at 80 series Landcruisers.

Mh
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Follow Up By: Alloy c/t - Tuesday, Sep 21, 2010 at 10:06

Tuesday, Sep 21, 2010 at 10:06
Motherhen , have a look at the carsguide website and punch in any make any model but specify brunswick diesel , methinks it makes your hypothetical $$ values just that , in the real world the conversion is an asset reflected in the $$ people are prepared to pay for a 'simple'motor that has the grunt ,,, the old mechanics saying of " you cant beat cubic inches " still applies for low down grunt be it in a 4x4 or a motorbike or a road car.
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Follow Up By: Madfisher - Tuesday, Sep 21, 2010 at 13:56

Tuesday, Sep 21, 2010 at 13:56
The conversion cost is closed to $26000. It would be a lot cheaper to buy a 4.8 petrol DOHC 180kw, if you only want more performance,plus they still have good low down torque.
Cheers Pete
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Reply By: Robin Miller - Monday, Sep 20, 2010 at 19:43

Monday, Sep 20, 2010 at 19:43
My next door neighbour has a 4800 like mine John, and thrashed it to death.

I'd swear its out of the drive every morning dead cold before the engine has rotated 5 times.

Picked up a good one from wreckers at $5000 - this would be the way to go.

More torque down low than your diesel and massively more power up top
and I suspect fuel use would be similar.
On top of that you wouldn't be shaken to death.

Mind you , I have been told there are only 8 new 4800's left in Australia and they are then extinct - but at $51,000 , how could you go wrong ?
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Reply By: Member - John S (QLD) - Monday, Sep 20, 2010 at 22:34

Monday, Sep 20, 2010 at 22:34
All great feed back, and much appreciated...once again. But i was wondering if anyone has a 4 cylinder 4X4 that can boast it can pull and/or overtake anything a V8 chevy diesel can? (or come close)

John
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Follow Up By: StormyKnight - Tuesday, Sep 21, 2010 at 21:48

Tuesday, Sep 21, 2010 at 21:48
The difficulty would be in matching everything else bar the engine for your comparison...

Tyres, diff ratios, gear ratios, weight, vehicle profile etc etc....

You could just go off the raw numbers kw/Nm as a guide but that doesn't mean that a particular engine actually drives better. Manufactures spend a lot of time gearing cars to engines for performance & economy...

If for example the peak torque of the V8 is lower than for the 4, then the economy will probably be worse since the 8 will not be running close to its best efficiency whilst in overdrive.

Also how much heavier is the 8 over the 4? Do you need to modify the suspension as well? How much more power & torque does the 8 provide? Does it rev as high as the 4 & does the 8 or 4 actually perform above 3000rpm?

PS I have a 4cyl 1kzte prado auto Diesel. The auto gives you a torque advantage so from a standing start it will pull very well, but it runs out of puff over 3000rpm. In fact it will accelerate better around 90-100km if you let it change up a gear & then use the torque of the motor rather than continuing to rev it. This is typical of older style engines, newer style behave more like a petrol in terms of the power & torque curves.

Cheers
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Reply By: Member Brian (Gold Coast) - Tuesday, Sep 21, 2010 at 07:11

Tuesday, Sep 21, 2010 at 07:11
Hi John,

First up.....
Have I first hand experience with a 6.5L Chev? No.
Have I first hand experience with a 4 cyl turbo diesel? No.
Have I read lots and lots on this subject? Not really.
Am I an expert? No.
Do I have an opinion? Yes. LOL..... (Don't we all?)

I have spoken with many people about this for some years and have come to the following conclusion. I have a 95 TD42 GQ Patrol. It's fitted with a Garrett turbo from Turbo Glide in NSW. Pulls the Tvan like,.... errr.. like a turbo diesel Patrol towing a Tvan! Easy!! I have way over spent on our 4by, but can't bring myself to part with it. I was talking with a mate last Sunday about engines, and what we would do if our current engines reached the end of their life, and I think the Chev would suit me fine. Depends on where you go, and how far outback you travel. Our holidays are getting more and more remote, and high tech engines with fancy computers don't have a place in MY world at all. I want a 4by that the local mechanic in Outbacksville Australia knows how to fix should anything go awry. The 4 cyl diesels do go hard nowadays, no doubt about it, but off road up the side of a mountain, unless the revs are up so the turbo is doing it's job, you have a small 4 cyl engine trying to push 3 or so tonnes around. Not real good IMHO.
With that in mind, it occurred to me that MY other option, and possibly yours too, is to rebuild the TD42, adding a turbo if it doesn't already have one. The TD42 has plenty of low down grunt for low range driving, and the turbo, if properly installed/set up/maintained will provide adequate stonk to tow your trailer! And give it a heap more grunt between the traffic lights!!

Just a thought.

Cheers

Brian

P.S For all the blokes out there who read this and want to take me to task about my comments regarding 4 cyl turbo diesels, please understand that you are welcome to have your opinions, and I am allowed to have mine! So don't bother! ;-))







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Follow Up By: kiwicol - Tuesday, Sep 21, 2010 at 16:39

Tuesday, Sep 21, 2010 at 16:39
Hi Brian,

Totally agree with your comments.

I have a 92 td 4.2 which was naturally asperated when i got it.

I have since fitted a super charger to the old girl. Which now puts the tubo 4.2 to shame. The S/C puts out 8psi at idle and all through the range, which gives it real low down pulling power, which is great when in the bush working at very low revs.

These new 4 cyl. diesals may go like hell on the black stuff, but put them in the bush with all their electronics, ill stay with the old school thanks.

Col
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Reply By: Outa Bounds - Tuesday, Sep 21, 2010 at 09:44

Tuesday, Sep 21, 2010 at 09:44
From a womans perspective, the Chev V8 has great power, it was fine around the city, had to use 2nd gear off the mark though. A 4.2L TD 1HDFTE may not be as powerful but sure is a lot quieter for those long trips! The V8 was mighty loud and seemed to have resonated on my side of the cab.

We've had 2 cars with the Brunswicks Deiesel in them, and I don't think my Husband has found anything else that compares to them power wise, he still thinks they are an awesome motor. He was reasonably happy with the 4.2 TD toyota donk in the next car after that but probably would have eventually chipped it or something.

Personally the noise really bothered me on the long trips, but then again some of the more modern cars (we had the V8 in a Troopie and 80 Series) probably better at keeping external noise out.

Our 80 series weighed well over 2t and no problem towing a camper with the chev at all.
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Reply By: Member - John S (QLD) - Tuesday, Sep 21, 2010 at 11:14

Tuesday, Sep 21, 2010 at 11:14
Just had another brain drain...how about a performance enhanced exhaust system? Has anyone had one of these things done to their vehicles?
If this could 'eek' out a few more horses from the old 2.8, me thinks this could be a cheaper alternative coupled with a DP chip...?

John
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Follow Up By: Alloy c/t - Tuesday, Sep 21, 2010 at 17:40

Tuesday, Sep 21, 2010 at 17:40
Extra breathing as in a Beaudesert exhaust may give you a few more ponies , is a d/chip even available for the 2.8 ? Ask that as the 3.0 is more computer controled that the 2.8 , totally different motors and next to nil parts compatabillity ??
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Follow Up By: Member - John S (QLD) - Tuesday, Sep 21, 2010 at 22:04

Tuesday, Sep 21, 2010 at 22:04
Hello Alloy,

yes the DP chip exists for the 2.8. I currently have one installed. its about the size of a matchbox and inserts under the dashboard.
The difference is marginal, but none the less different. By adding a 2.75" Beaudeset exhaust along with the DP chip, I'm hoping that this will be all I'll have to do to get it to an acceptable stage without spending mega bucks on engine conversions and another new vehicle.

John
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Follow Up By: Bigmaxy - Monday, Sep 27, 2010 at 12:48

Monday, Sep 27, 2010 at 12:48
I don't post very often but couldn't resist this one. Get comfy if you can be bothered reading it all.
I've actually owned a Nissan 3L, a 4.8L and a 6.5 Chev and drove a 4.2TD for work so I may be able to give you an idea.
First things first, the 120 kw output for the chev (as previously stated) is for the older 6.2L chev. The 6.5L, which is the most common conversion out of the 2, puts out 130kw. Not a big difference but still a difference. A few simple mods can fix that. Mine dynoed at 110kw at the real wheels with just a modified exhaust. My mates put out 180kw at the rear wheels (his is the turbo and intercooled version) with gas injection. The torque on these motors is unbelievable and nothing nissan makes compares, even the 4.8. Having said all that, the 3L and the 4.8L are much nicer to drive around town. If it's acceleration you want, the 6.5 is not the option for you. It's bloody slow!! The 4.8 went like a shower of sh** but at 25L/100km (yes you read it right) the fuel consumption was ridiculous (and that's not towing either). In comparison the 6.5 does 15/100km in the same vehicle. The 3L I used to own, struggled to tow, especially when going up hills, and struggled off road in the slow stuff, but actually went pretty well in the sand (except when towing). The 4.8L was awesome for everything as was the 4.2TD. Don't get me wrong, I love the 6.5. I drove it around Australia and it never missed a beat, but it's not worth the 20 grand it cost for the conversion and definitely needs a turbo. If I had my time again I would put the 4.8 on gas but for the best all round motor, I would have to say the 4.2TD. So if I was you, depending on what your uses are of course, buy a second hand 4.2TD or as a previous poster already said, buy a second hand 4.8. I ended up selling my 4.8 for just $1900 with 100 000 ks just to get rid of it quickly.
Just my 2 cents.
BM.
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Follow Up By: Member - John S (QLD) - Tuesday, Sep 28, 2010 at 15:41

Tuesday, Sep 28, 2010 at 15:41
Gday BM,

you may not post much, but i am glad you did this time. I never thought about the 4.2 TD. It is definately a good idea for me to look into. But...the kid in me really wants the 6.5 turbo chev. I see that brunswick sell 4x4's already equipped with the conversion. Another avenue for me to look at.
another part of me really wants to try the 3" exhaust system as well. MAN!...so many options. my wife says i am just a big kid in a toy store! i thinks maybe she is right!

John
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Follow Up By: Bigmaxy - Thursday, Sep 30, 2010 at 00:05

Thursday, Sep 30, 2010 at 00:05
John,

You can easily modify a 4.2TD to put out decent horsepower (more than a chev 6.5 NA) for a decent price. Many places do a turbo and intercooler upgrade and with a 3" straight through exhaust these things can put out big figures on the dyno. All for thousands less than a 6.5 chev.
Here's another option for you. 6.6L duramax. This is the newer, bigger, better, more powerful, common rail version of the chev 6.5. In standard form it puts out 300 rwhp and can easily be tuned to 500 rwhp. It's a tight fit but there's a few blokes in QLD doing them now and this conversion is becoming more popular. It'll cost you 35K drive in drive out, but when a 6.5 costs you 25k, the extra 10k is worth it. Jump on the outerlimits forum and search for them for more info. It's the next engine on my list when I get bored with the 6.5.
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Reply By: Member - John S (QLD) - Tuesday, Sep 28, 2010 at 15:51

Tuesday, Sep 28, 2010 at 15:51
Does anyone know of anyone on the East Coast that does the same things as Brunswick on the West Coast?

John
AnswerID: 431664

Follow Up By: Bigmaxy - Wednesday, Sep 29, 2010 at 23:29

Wednesday, Sep 29, 2010 at 23:29
Linquip. Just outside of Brisbane. Check out www.linquip.com.au.
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Reply By: Alloy c/t - Tuesday, Sep 28, 2010 at 15:59

Tuesday, Sep 28, 2010 at 15:59
If you havent had a look already ,have a look at the cars guide website , a 98 built 105 cruiser with all the fruit , you name it its got it , fitted with a 6.5 brunswick diesel ,, a private sale at Kedron / Brisbane , just the photos can make you drool ,,LOL.
AnswerID: 431666

Follow Up By: Member - John S (QLD) - Tuesday, Sep 28, 2010 at 22:15

Tuesday, Sep 28, 2010 at 22:15
Gday Alloy,

thanks for the tip. But mate, i have searched high and low for that car, and cannot find it on carsguide.com.au.
would you mind pasting the link to me? my email address is in my profile.

thanks a bunch,

John
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Follow Up By: Alloy c/t - Wednesday, Sep 29, 2010 at 07:46

Wednesday, Sep 29, 2010 at 07:46
Carsguide vehicle ID 8094275.
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Follow Up By: Bigmaxy - Wednesday, Sep 29, 2010 at 23:42

Wednesday, Sep 29, 2010 at 23:42
I saw that on carsguide too. Awesome vehicle. However, without getting into the whole Toyota v Nissan thing, I'd be careful about the chev diesels in Toyotas. I used to have one in a Cruiser. I blew up 2 gearboxes. One time it spat a tooth that hard it cracked the gearbox housing completely in half. Mind you I used to give that car a flogging. Anyway, I now have a chev in a Patrol as the gearbox and driveline is much stronger.
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