Prado 120 series V6 or 1KZ-TE (non CRD motor)

Submitted: Sunday, May 05, 2013 at 13:38
ThreadID: 102029 Views:12253 Replies:9 FollowUps:10
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Hello all

We are wanting to upgrade our car (currently a Forester) in order to continue our outback travels towing a small camping trailer. Have recently used the Forester for this purpose however it is lacking in room and really at its limits with regards to towing. Also is a bit restrictive where we can travel with it.

Our budget is around $20K - $26K which there seems to be ample supply of Prado's in that price range with around 120,000-200,000km on them already set up with t/bar and b/bar most of which seem to have lived in the major cities.

My research has found the diesel motor could be prone to cylinder head failure and that the V6 is quite thirsty. I have read through the Prado Point forum and various others and are left wondering if the head issue really is all that widespread ?

We live approx 50km out town (all country driving) and the vehicle would be expected to travel approx 30,000km/yr for work and shopping commitments so fuel economy is a consideration

I would welcome some wisdom from those who are experienced with these Prado's to help narrow my choice. I should add that I am not interested in the common rail motor at all and would only ever consider purchasing a new one with warranty which is outside budget anyway.

So I guess what I am asking is it worth risking head failure for fuel economy or is this issue overblown.


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Reply By: Member - Charlie M (SA) - Sunday, May 05, 2013 at 13:59

Sunday, May 05, 2013 at 13:59
Hi Peter
The early 120 GLX will do all you ask. I have had both engines and it was only when upgraded to a full caravan that had power problems. The earlier engine handled out poptop with ease, but struggled with the full hight caravan. Both vans were about the same size and weight. We had no problems with the motors at all, both were the diesel early and D4D.

Cheers
Charlie
AnswerID: 510365

Reply By: Barbera72 - Sunday, May 05, 2013 at 14:29

Sunday, May 05, 2013 at 14:29
My Prado120 GXL V6 petrol (150.000km) uses 14-15litres x 100Km fully loaded + loaded roofrack and 15-16litres x 100Km city drive no load. Your 30.000Km/yr will cost you approx. 6.000$ in fuel. Great car though for a medium size 4X4 in my opinion.
AnswerID: 510367

Reply By: olcoolone - Sunday, May 05, 2013 at 16:10

Sunday, May 05, 2013 at 16:10
Anything you read on the net take with a pinch of salt, if you had a look on the Pardo forum and some other if it was a real problem and it was common you would soon read about it.

Any vehicle has it's fair share of issues and the Prado is no different...... there would be more out there with cracked fire walls and inner guards than engine issues.

Anything you buy that age with that amount of kilometers you would have to expect some problems..... some big and some small.

Common rail motor have no way near the problems some make out they have.... there is always horror stories of my mates brothers cousin knew this bloke...... you know the story, there is no more failures with common rail engines than there is with any other.... just that people have short memories.... take the 80 series diesel Landcruiser with it's big end failures, all fixed and now it's one of the most popular 4x4's out there...... the 100 series with IFS front end cracking....... still fetching more than a 200 series in some instances..... short memories we have!
AnswerID: 510373

Follow Up By: Rockape - Sunday, May 05, 2013 at 21:03

Sunday, May 05, 2013 at 21:03
Gotta agree with the cool one. If you go to any forum for a vehicle you will see the common faults. Yes you will see faults about everything from blown motors to dirt on the paint work. What you look for is a heap of complaints to one particular fault, be it design or failure.

This will show if the vehicle is a good buy.

Also have a look at the Pajero. They are no slouch either.

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FollowupID: 788492

Follow Up By: Kimba10 - Monday, May 06, 2013 at 22:21

Monday, May 06, 2013 at 22:21
And leaking injector seals is a major problem in the 120's with the D4D. The bull bleep that the 08 models upwards have solved the injector problems is crap. They are still stuffing up and leaking and causing engine blow ups from the oil pick up screen getting blocked. And no its not from lack of oil changes or filter. These people are changing their oil and filters every 5k, don't just check Prado's either. Check out the hilux forums with the same engines. Do I own one, nope. I went for the petrol 4L V6 120 with 5 speed auto and its a ripper. I had two 90 series prados before this one. The 1kz in auto is a slug. Mine was top of the range grande and the head went at 103k. Serviced every 5k with genuine oil and filters, genuine coolant, even down to wiper blade inserts and it towed a box trailer and it still cracked, 4g to repair. This is common in the 90's but not the 120, bigger cooling system but are even more sluggish in the 120's due to the weight of the 120 over the 90. I just finished doing some towing with mine and had over a tonne on the back and managed tad under 15L per 100. Not towing I manage 11.4/11.6 L per 100k doing the speed limits and there is no where near the issues with the petrols compared to the diesel D4D. I could have got a D4D but don't regret for a minute getting my petrol, comfy, heaps of grunt if needed, 179kw with 379nm compared to 96kw and 343nm in the 1KZ diesel, D4D has 410nm. Fuel economy in my diesel was better around town then my petrol by about 3 L per 100 but this is all stop start, running to kindy, local shops no freeway or highway, but freeway driving at 110k both my petrol prados were/are better the the diesel 1KZ. I could get the diesel a tad under ten if I sat on 90k, jump to 110 would see it rise to 13 and if it was a hot muggy steaming day running aircon it would jump to 15 ?? D4D is a total different kettle of fish, better in economy in all area's and go well, but with the money your talking you would only get super high klms. I wouldn't buy one with high klms. I would want low klms and extended warranty before I bought a D4D. Just my thoughts every one has their own opinions on all vehicles. If I was doing just all towing touring constantly I would definitely go turbo diesel but I would be driving a mitsi 3.2 DiD pajero, ripper of an engine and great economy, tad noisier in the cabin but a great tug wagon, hence a lot of grey nomads towing that use them...............
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FollowupID: 788558

Follow Up By: fisherPete - Tuesday, May 07, 2013 at 22:46

Tuesday, May 07, 2013 at 22:46
Yeah Steve,never thought I would see the day when petrols deliver better reliability then diesels,but with a fleet of over 200 vehicles we have more problems overall with diesels then petrols.
Glad you like the 120.
Cheers Pete
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FollowupID: 788626

Follow Up By: olcoolone - Wednesday, May 08, 2013 at 22:32

Wednesday, May 08, 2013 at 22:32
Jeezzz Kimba I didn't know the D4D's were such a bucket, funny how I don't know of many other then a few that have had problems and we run 5 of them.

Read Lcool, New Hilux Forum, Prado point and with all the members on there with D4D engines I would expect to see pages and pages of failures from a very vocal group of enthusiasts...... how come I don't.

Why would you want to change oil and filters every 5k in a D4D? it's a no brainer.

Maybe they don't have anymore failures then the other brands....... suppose when Toyota sell 4-5 time more diesel vehicle then the rest you would expect more to fail.

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FollowupID: 788734

Reply By: Member - Michael A (ACT) - Sunday, May 05, 2013 at 18:36

Sunday, May 05, 2013 at 18:36
Just go to pradopoint web site.

I have a 2006 1kz-te never had an issue. Like any vehicle keep maintenance up and do regular checks.

regards

M

Lifetime Member
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AnswerID: 510380

Reply By: Member - Toyocrusa (NSW) - Sunday, May 05, 2013 at 20:04

Sunday, May 05, 2013 at 20:04
The earlier 120 series V6 with a four speed auto is no where near as fuel efficient as the later five speed auto. The 5 speed came out around oct 2004. If you are driving 50k fairly constant you can get down around 12l/100 but they can still be a bit thirsty with a heavy van on the back. Mine towed 2.5 tonne without any problems though. Sold it to my brother last year in immaculate condition with 4 new tyres, a heap of towing extras and 110000K for $26K. Cheers,Bob.
AnswerID: 510386

Reply By: Member - Toyocrusa (NSW) - Sunday, May 05, 2013 at 20:10

Sunday, May 05, 2013 at 20:10
The earlier 120 series V6 with a four speed auto is no where near as fuel efficient as the later five speed auto. The 5 speed came out around oct 2004. If you are driving 50k fairly constant you can get down around 12l/100 but they can still be a bit thirsty with a heavy van on the back. Mine towed 2.5 tonne without any problems though. Sold it to my brother last year in immaculate condition with 4 new tyres, a heap of towing extras and 110000K for $26K. Cheers,Bob.
AnswerID: 510388

Reply By: Member - Phil G (SA) - Sunday, May 05, 2013 at 20:53

Sunday, May 05, 2013 at 20:53
The 1KZ-TE is a fairly thirstly diesel motor. Official figure was around 11.6 L/100k compared to 9.3 on the 1KD common rail motor - so quite a difference. I struggled to get better than 13.0 l/100 out of a 1KZ-TE not towing. Given the need for 5000k services, the higher cost of diesel and the high cost of the 1KZ filters, it ends up line ball when you compare the running costs with the 4.0 petrol motor.

In my mind the choice is between the V6 petrol motor and the common rail 1KD. In your price range, I'd pick up a nice V6 that has only been used to cart the kids around.
AnswerID: 510392

Follow Up By: desray (WA - Sunday, May 05, 2013 at 22:30

Sunday, May 05, 2013 at 22:30
I agree 100% with Phil,, go the V6 ,, (mine runs on LPG cost me $30 a week to run )
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FollowupID: 788497

Follow Up By: Kimba10 - Monday, May 06, 2013 at 22:26

Monday, May 06, 2013 at 22:26
After owning 3 Prado's, one 1kz 90 series grande, one 3.4L petrol grande, and currently have 120 petrol 4L V6 and would totally agree with Phil's comment 100%............
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FollowupID: 788559

Reply By: fisherPete - Sunday, May 05, 2013 at 22:01

Sunday, May 05, 2013 at 22:01
I do remember one of our regulars Steve doing a head on his Ikz, cost him over $3000 for memory. He then went back to the v6 with his next Prado.
Cheers Pete
AnswerID: 510399

Follow Up By: Kimba10 - Monday, May 06, 2013 at 22:28

Monday, May 06, 2013 at 22:28
Good ay Mate how you been ??, yep that was me, cost me a tad under 4k and yes went back to 4L V6 120, ripper of a 4wd.................
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FollowupID: 788560

Reply By: Jarse - Monday, May 06, 2013 at 08:49

Monday, May 06, 2013 at 08:49
I've had a 2005 1KZ version since new.

The biggest repair I've had to do is the auto gearstick modification. Cost me less than $10 plus a bit of safety-tie wire. The alternative is about $950, and it will fail again.

Nevertheless, I really like my Prado. It'll never win a race, but that's not why I bought it :)
AnswerID: 510415

Follow Up By: Jarse - Monday, May 06, 2013 at 08:51

Monday, May 06, 2013 at 08:51
I should have mentioned that with the gearstick mod, it WON'T fail again.
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FollowupID: 788510

Follow Up By: Kimba10 - Monday, May 06, 2013 at 22:32

Monday, May 06, 2013 at 22:32
this is a good mod toohttp://www.pradopoint.com/showthread.php?25297-120-Prado-shift-lever-repair-kit
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FollowupID: 788561

Follow Up By: Jarse - Wednesday, May 08, 2013 at 09:47

Wednesday, May 08, 2013 at 09:47
Kimba10, that's the kit I used, and it's top quality. The reason I used safety-tie wire is that the holder for the bullet actually cracks, allowing the bullet to fall out.

I figured that while installing the longer bullet moves the stress point further into the holder - there's still going to be a load on the cracked part, which might allow it to propagate later on. So I ran a piece of the wire around the neck of the bullet holder and tightened it *just enough* to close the crack neatly.

That way, any stresses will be shared over the whole of the surface, not just along the crack. I'm confident this will last the life of the car.
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FollowupID: 788646

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