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HiLux - deep technical help

SteveS

Well-Known Member
Joined
Jan 12, 2013
Messages
630
Bit of a long shot but so far I'm not getting much help from the HiLux Owners Club site and i wondered if anyone here could help point me in the right direction.....

the short story is that I'm prepping a HiLux to overland in south america and here it can be high altitude - very high easily 3000-5000m. Ive noticed that there are some different parts specced for the 3.0D4D KUN26 for high altitude countries like Peru etc. However, what I'm trying to get is a DEFINITIVE list of the additional parts on high altitude spec vehicles for that market. I would also like to get the variant number for the model sold in that part of the world. So I can see some additional pressure valves, filtering and pipes but I need to understand whether there are are other things like a different ECU flash, or exhaust, or fuelling (e.g. diesel heaters etc).

Can anyone please point me to where/who can give me definitive technical info like this. I haven't yet contacted the EU technical help line or a local dealer (as im in outback Australia ATM) but from what I've read they can only help with european vehicles (ie may not help with south american specs

The Lux in its standard form is specd to 3000m but I will be going a Looooooong way above that

Thoughts/ideas/contacts/access to the Toyota master computer?

Part 2 of the question is that the pistons were improved following problems reported in Australia......anyone able to confirm the Engine Number from when this was done

Thanks in advance - sorry its not LC but this forum has been so good over the years at answering my questions

Steve
 
You could try some of the UK based Overland Companies who specialise in this kind of Adventure. They must have experience in the High altitude expedition Adventure and Vehicle Prep... Other than that, Take your Air filter out and sling it in a field...
 
Perhaps look at increasing available boost with a manual boost setting thingamy like @Shayne has fitted to his. In fact, if you copied Shayne’s improvements, I don’t think you’d be far off what you need. As far as I know (and that’s not much on the subject) in acrarer atmosphere it’s all about getting more air into the engine and making up for the lower atmospheric pressure. With a turbo and fueling tweak, plus intercooler, you should be far better off. There’s always upgraded turbo from Wink or Turbotechnics plus a larger bore exhaust if you want to go the whole hog.
 
Hi Steve,

What are your plans? We're heading that way in 2020?

Don't know how much help this is but some Land Cruisers have a High Altitude Compensator (HAC) which is a baffles type device that senses the air pressure and compensates accordingly. Not sure if you can get something similar for a Hilux.

I know a few people who have done the trip, including the high passes etc, and they have done it without modifications. One of them did it in the same engine as mine (1HZ) albeit with loss of power and a lot of smoke.

Anyway just some food for thought. I'll be watching other replies with interest.
 
Can you not use TOYO and pretend that your vehicle is from South America and cross read the relevant part numbers across to an EU version?
 
I'm not an expert on this stuff but bear in mind that decreased air pressure is going to effect other things such as the boiling point of your coolant, the efficiency of the radiator etc. Also i've read that turbos at altitude can cause higher EGT which can cause damage. Presumably your turbo will need some sort of adjustment due to the bouncing from sea level to 4000m so frequently which I think you'll prob be doing quite a lot.

Maybe worth asking around somewhere like Expedition Portal or Horizons Unlimited, the later being mainly a bike forum but may have some insight......
 
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Variable vane turbo i imagine so fuel and air is digitally managed and so your answer is almost certainly digital .

Tuning chip or ecu swap ?
 
:doh:
How did I miss that this was the D4D engine… either this head cold is affecting me or I’m going senile!!
 
Many a true word spoken in jest Clive…

:)
 
I remember 'Top Gear' doing a "Patagonia Special" back in the Clarkson days.

Despite what appears in front of the camera there is usually a lot of research behind the lens and they use specialised Companies when planning the shows.

Its possible the credits at the end of that episode would provide some useful clues as to who to ask !

Bob.
 
Not the Andes, but there is a member called Bhutan who sometimes posts here who I think runs a 120. He might have some practical experience of how the 1kdftv copes with high altitude working.
 
I know it can be a problem on lots of new vehicles. The guys we went to the Italian alps with (alpinerovers) have had people having the same problems even in the alps (max 10000 feet). I don’t know the specifics for qwhich vehicles were affected but the dealers sorted them out. Just some ECU tweeks
 
I had my KZ to similar heights in the USA without too many issues just a bit of smoke without any alterations to compensate plus temps of down to -50C for which I had prepp'ed. How about contacting Arctic Trucks? They have a bases in various locations around the world now. Also the Hilux Forum in RSA might be able to help? (I know you're going to South America not South Africa but I find that the South African sites often have lots more info than the UK)
https://www.hilux4x4.co.za
 
I had my KZ to similar heights in the USA without too many issues just a bit of smoke without any alterations to compensate plus temps of down to -50C for which I had prepp'ed. How about contacting Arctic Trucks? They have a bases in various locations around the world now. Also the Hilux Forum in RSA might be able to help? (I know you're going to South America not South Africa but I find that the South African sites often have lots more info than the UK)
https://www.hilux4x4.co.za
The problem is, engines are now set up for specific markets. A South African Spec vehicle is not the same as a euro spec, neither is a Russian spec.
My understanding is the KZ is a more basic engine so doesn't have all the 'mum' features of a modern engine. An older engine will, as you discovered, just blow out more smoke and lose some power, but on a modern engine the ECU will interpret that as a fault and put the vehicle into limp mode, unless it has been told not to.
 
Hi Steve,

What are your plans? We're heading that way in 2020?

Don't know how much help this is but some Land Cruisers have a High Altitude Compensator (HAC) which is a baffles type device that senses the air pressure and compensates accordingly. Not sure if you can get something similar for a Hilux.

I know a few people who have done the trip, including the high passes etc, and they have done it without modifications. One of them did it in the same engine as mine (1HZ) albeit with loss of power and a lot of smoke.

Anyway just some food for thought. I'll be watching other replies with interest.
Hi Nick - we are planning to touch down in Ecuador late March early April 2020 and then drive south from there. Pm me if you want
 
Can you not use TOYO and pretend that your vehicle is from South America and cross read the relevant part numbers across to an EU version?
Yes I could if I knew what the hell I was doing. I started looking at some Russian site that has given a whole bunch of part numbers and some drawings of the extra bits required. It seems to hinge on the engine and model variant that I have and the model variant that I want it to look like - the gap being the bits I may need to buy and install. It is just that I don’t know the target variant......anybody help with this?
 
Thank
I had my KZ to similar heights in the USA without too many issues just a bit of smoke without any alterations to compensate plus temps of down to -50C for which I had prepp'ed. How about contacting Arctic Trucks? They have a bases in various locations around the world now. Also the Hilux Forum in RSA might be able to help? (I know you're going to South America not South Africa but I find that the South African sites often have lots more info than the UK)
https://www.hilux4x4.co.za
thanks for the tips - I will try there and also see if there is a South American site similar......no hablo espanol though
 
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