1 HD-T FZJ80 Conversion

[rtarh2o]

For those who followed my 6.2 diesel FZJ80 conversion I want to say it is a great vehicle, I absolutely love it. The 6.2 is a great fit in the 80, good power, cheap parts, runs great, sounds great etc, etc, etc. I would highly recommend it to anyone considering a great affordable conversion. It easily gets 20 mpg on the highway and with proper driving and the right set-up could do better.
But..... I have a 97 FZJ80 sitting in my workshop and I have a lead on a 1HD-T complete with automatic. With the value of the 80's down a bit I am considering selling my 6.2 FZJ80 and swapping the 1HD-T into my 97. The 1HD-T was my first choice a year ago when I was first considering the conversion but I couldn't find one, now a year later I have found one and still have a 97 waiting for something. I also have permission from my wife!
Now for the questions, how much of a bolt-in is the 1HD-T into a 97 FZJ80? From what I have heard it will bolt in, no mods at all? What about the wiring, the 1HD-T from what I understand is a mechanical injection, if this is true is should be fairly easy. What about the transmission, what automatic would be on it? Would it have be electronic? What else am I going to need? I originally ruled out the 1HD-T because I was told I would need a half-cut. After doing the 6.2 I realize it would save time to have a half-cut but it certainly is doable without.
By the way, this 1HD-T has run on ebay twice without any bids, anyone know why? The seller says he actually has 2 of them.
Thanks again in advance, I am getting excited about the prospects of an all Toyota diesel 80!
If anyone is interested in my 1994 6.2 diesel powered 80 let me know. I am probably going to run it on ebay but let me know if you are interested.
Rusty

 

[70sguy]

You better make sure the 1HD-T A442F you have the lead on is post 92/08 or you will be in for a whole bunch of headaches.

May the force be with you

 

[ThePookieBear]

That would be sweet dude. Hop on that!!

 

[rtarh2o]

What do you mean post 92/08? And what kind of headaches?
Rusty

 

[70sguy]

August of the year 1992. That is when some major changes occured in the tranny control dept.
Everything before that date is pure Hydraulic and cable speedo like the set up in the FJ80s. After 92/08 A442F gets Electronic control- ECT computer, TPS on injection pump, push button OD, electronic speedo etc.... which is what you really need if you are swapping a 97.
As far as the 1HD-T engine is concerned not much changes... the oil level sensor in the pan is all that comes to mind.

Good luck

 

[ThePookieBear]

So, if you already had an FJ80, it would make more sense to swap in the pre 92/08 stuff right?

 

[70sguy]

Yup. If you are going with a 5speed... then it doesn't really matter.
But the FJ80 reguires different mounts welded to the frame.

 

[ThePookieBear]

I figured so. Does the 1HZ have the same mounts as a 3FE or a 1HD-T? And do any 1HZ's come with an A440?

 

[rtarh2o]

The 97 has the A343? transmission? Is the wiring and computer for the A442 and the A343 the same? If not it might actually be easier to deal with the earlier set-up. Either way I am going to go ahead and get it if things work out, I am not too worried about making it work either way.
Other questions are about the engine accessories, A/C, power steering (hydroboost?) etc. Anyone know anything about these?
On a side note, after driving my 6.2 80 with hydroboost brakes I would recommend converting every 80 to this set-up, especially with oversize tires. My old 94 with the same 285/75 tires just didn't feel very strong stopping. With the hydroboost you just tap the brakes and you stop, amazing difference. It was really a pretty easy swap, at least with the GM power steering pump.
Anyway, all information on the 1HD-T is appreciated.

Rusty

 

[-uhuru-]

I figured so. Does the 1HZ have the same mounts as a 3FE or a 1HD-T? And do any 1HZ's come with an A440?

1HZ and 1HD-T share the same mounts, they use different silentblocks. I dont know about the 3FE.

'91-'92 HZJ80's came with the A440 tranny in my country.

 

[-uhuru-]

The 97 has the A343? transmission? Is the wiring and computer for the A442 and the A343 the same? If not it might actually be easier to deal with the earlier set-up. Either way I am going to go ahead and get it if things work out, I am not too worried about making it work either way.
Other questions are about the engine accessories, A/C, power steering (hydroboost?) etc. Anyone know anything about these?
On a side note, after driving my 6.2 80 with hydroboost brakes I would recommend converting every 80 to this set-up, especially with oversize tires. My old 94 with the same 285/75 tires just didn't feel very strong stopping. With the hydroboost you just tap the brakes and you stop, amazing difference. It was really a pretty easy swap, at least with the GM power steering pump.
Anyway, all information on the 1HD-T is appreciated.

Rusty

Try to stay away from the A440. The A442F is way better and does not have the overheating issue that A440's are famous for. You can always use a stand alone tranny computer if you can't find a harness and ECT.

The PS pump in the 1HD-T is built into the the timing gear setup. Its gear and shaft sit bellow the injection pump.

 

[motorcoach123]

As far as the 1HD-T engine is concerned not much changes... the oil level sensor in the pan is all that comes to mind.

Good luck

My 10/92 HD-T has the oil level sensor...as was mentioned.

Gord

 

[70sguy]

The 97 has the A343? transmission? Is the wiring and computer for the A442 and the A343 the same? If not it might actually be easier to deal with the earlier set-up. Either way I am going to go ahead and get it if things work out, I am not too worried about making it work either way.
Other questions are about the engine accessories, A/C, power steering (hydroboost?) etc. Anyone know anything about these?
On a side note, after driving my 6.2 80 with hydroboost brakes I would recommend converting every 80 to this set-up, especially with oversize tires. My old 94 with the same 285/75 tires just didn't feel very strong stopping. With the hydroboost you just tap the brakes and you stop, amazing difference. It was really a pretty easy swap, at least with the GM power steering pump.
Anyway, all information on the 1HD-T is appreciated.

Rusty

Yup, A343F. Not the same wiring or computer. According to the EWD, 95 up FZJ80s got a combined Engine and tranny ECU. So that makes for lots more wiring fun.
At any rate, you NEED to get the Toyota EWDs for both the donor HDJ81 and the recipient 80 in order to gain a thorough understanding of where things are and how things work on both trucks, then you will be able to make informed decisions about how you are going to do the swap. Lay it all out on paper B4 you start pulling things apart.
PS and AC are easy don't worry about those right now.

 

[rtarh2o]

70sguy, thanks for the information. That is sort of what I was afraid of as far as the A343. The seller couldn't tell me the exact date of the engine but the serial number is 0017046. Any idea what it is?
Assuming it is an A4442 on the engine and electronically controlled could I get the electronics from a gas A442 and swap over to the 97? You are right about the wiring diagram, I started on my 6.2 conversion without much of one but once the engine was out and I started removing wires I sure found it useful! I only needed about 10 of the factory wires on the 6.2, the others are gone. Not sure if the 1HD-T is that way, is anything going to be just plug and play?
Rusty

 

[-uhuru-]

The ECT of an auto 1HD-T is different than the F/FZ version.

The ECT on a diesel requiers the same VSS signal as a gasser but the TPS is different since the injection pump is totally different. The donor engine must have a TPS on the injection pump for the electronic tranny to work, if it doesn't it can be retrofitted quite easily. Finding one might be more trouble than installing it. It is just a "potenciometer" (sorry translating from spanish here).

This can also do the job for $750 bones.

http://www.powertraincontrolsolutions.com/content-4.html

 

[70sguy]

Assuming Toyota produced and tagged the motors chronologicaly it is going to be an early set up.
We parted an Oct 1991 HDJ81 and the 1HD-T serial was 0022790
It will definately be an A442F, no other Auto tranny went into the HDJ81.
IF its ECT type (which I doubt) then you can't use any of the Electronics from a Gasser.
You will need a Diesel ECT computer and I am going to speculate, since I have not yet swapped an A343 equipped FZJ80, You may also need an ECT plug and harness stripped out of a 93/94 FZJ80. So that you can splice in the ECT computer in place of the Gasser Tranny/engine ECU.

If you can get the seller to fwd some pics, top of the injection pump will tell all.
It will look like this.

 

[rtarh2o]

70sguy, how soon are you starting your 97 conversion? Would be nice to know exactly what I am going to need. Is there any chance you will be getting any engines soon? I am a little suspicious of the seller of the one I am looking at now.
Rusty

 

[70sguy]

I won't be getting to the 97 until I sell my 93
And I will likely be going 5 speed on it too.. so it's not going to be the same as what you are up against in the wiring dept.

 

[rtarh2o]

I wouldn't mind to do a 5 speed conversion but I thought the conversion parts would be hard to find around here.
Rusty

 

[BlueHZT60]

By the way, this 1HD-T has run on ebay twice without any bids, anyone know why? The seller says he actually has 2 of them.
Thanks again in advance, I am getting excited about the prospects of an all Toyota diesel 80!
Rusty

I saw that today and started speculating along the same lines. I'd need to pawn off the hz-60, or my hz-45 project though and that's not in the cards right now. I'd hazard a guess that the importer got stuck with the diesel engines in a crate full of JDM gasser engines and just wants to dump them. Given my experience, I'd stick with a known entity &/or plan on stripping and rebuilding -before you slam it into the 80 (excuse me - bolt it in). Texas might be ok for a used engine, but put it up in Colorado with big hills, that engine will see whole new stresses & strains it never experienced in Japan. Bob