Outer Limits 4x4 Board

hey. a mate just picked up a 1985 bj70. it looks just like a bundera same smaller size (not a middi 73) but it has cruiser running gear with leafs and a 3b deisel engine. i have never seen one before were they not in production for long before being replaced with the coils sprung hilux version?

anyway what r some things to look for, motor has 220,000k's on it and runs well no oil leaks but heaps of rust in body .
are most parts interchangable with 73/75's suspension and driveline wise?
how does the 3b take to a turbo?

I'm sure these were sold alongside the bundera. Drivetrain is the same, i think suspension is the same (rear may be different?).

3B's love a turbo, something to do with piston skirt cooling.

it's a short wheel base cruiser. about 100mm shorter than a MWB 73, and yes most things are interchangeable between the 75-73-70.

The 70 series landcruisers were the SWB model, shorter than the middys as thommo has pointed out.

They share all the same components with the 73/74/75 landcruisers of the same vintage (post 1990 cruisers had an update and some things changed eg: hi pinion front diff)
The Bundera is a LOT different to a SWB landcruiser. if you look closely, a Bundera front is entirely different, blinkers in the front grill next to headlights - whereas all 7x series cruisers have the blinkers on the side guards. The interior is pretty much the same and I think some of the back body work.

The mechanicals are generally pretty reliable.. they are the same as all other heavy duty cruiser components so your mate should get a good run out of it if its been looked after ok.
You've probably found most of the rust but the more common locations are in the bottom of the rear guards and under the rear window sills, particularly if they are sliding windows.

I've got a 1990 PZJ70 (an even rarer breed again) and have the manuals for it so if your mate has any specific questions, feel free to PM me.

Cheers
Dan

As Smithie said, Bundera had the "original" Prado nose...

BJ70 was my first 4WD 13 years ago - still have a soft spot for them - followed that with 2 LN65's and wished they had the 3B in them...

I could be mistaken but I think Roothy's Milo has a 3BT (turbo) - not sure about that though...
Mike

2 rocks wrote:As Smithie said, Bundera had the "original" Prado nose...

Except the old prados had square headlights - 'Bunderas' (local model only?) had round lights. I'm sure i've seen SWB RJ/LJ models with the square lights too, however.

2 rocks wrote: I could be mistaken but I think Roothy's Milo has a 3BT (turbo) - not sure about that though...
Mike

I think that's a 13bt or 14bt, both direct injection heads IIRC - a little different to the 3b. However from discussion on here, the 3b seems to love some boost and is a very hardy motor.

-Stu

dogbreath_48 wrote: Except the old prados had square headlights - 'Bunderas' (local model only?) had round lights. I'm sure i've seen SWB RJ/LJ models with the square lights too, however.

Yup, I've seen them too...

2 rocks wrote: I could be mistaken but I think Roothy's Milo has a 3BT (turbo) - not sure about that though...
Mike

dogbreath_48 wrote:I think that's a 13bt or 14bt, both direct injection heads IIRC - a little different to the 3b. However from discussion on here, the 3b seems to love some boost and is a very hardy motor.

I think you're right - it is the 13 not 3, but I'm sure I've seen factory turboed 3b's - Yum!
Mike

The 13bt is the factory turbo diesel in BJ70/73 .The 14bt was never an option in this model. I used to have FJ70 with a 3F petrol motor. i now own 3 73 series i have 2 FJ73's and 1x BJ73.

Ben

Evil 73 wrote:The 13bt is the factory turbo diesel in BJ70/73 .The 14bt was never an option in this model. I used to have FJ70 with a 3F petrol motor. i now own 3 73 series i have 2 FJ73's and 1x BJ73.

Ben

Later models (1989+ perhaps) have the 14bt - but i don't think these were ever sold locally.

3b never came factory turbo as far as i know.

Evil 73 wrote:The 13bt is the factory turbo diesel in BJ70/73 .The 14bt was never an option in this model. I used to have FJ70 with a 3F petrol motor. i now own 3 73 series i have 2 FJ73's and 1x BJ73.

Ben

This is correct. But they bolt straight in and boy what a great engine.
I bolted in a non turbo 14b and it goes better than the 3b turbo that I had. Cant wait to turbo the 14b. It will be awsome. as good as a 1hz, in my opinion.

For the record, the 5 cylinder 1PZ and 6 cylinder 1HZ were also available from factory in the 1990+ vehicles, although they were called PZJ70's and HZJ70's.

While a 1HD-FT isnt quite a straight drop in job, it is relatively easy to do the conversion and it has definantly been worth the effort

what r the timing belt change intervals on the 3b?
and what kind of power is acheivable with a turbo intercooler set up, 100kw? what r the standard?

also does anyone know how much these lil things weigh?
Were did u get a 4b or 14bt motor from?

known 2 wrote:what r the timing belt change intervals on the 3b?
and what kind of power is acheivable with a turbo intercooler set up, 100kw? what r the standard?

also does anyone know how much these lil things weigh?
Were did u get a 4b or 14bt motor from?

there is no timing belt/chain, only timing gears.

125kW (flywheel) is fairly easy out of an internally standard, rotary pump 3B with open exhaust and intercooler, running about 1 bar boost. probably get 110kW from the earlier versions.

they are a heavy motor, probably simimlar in weight to a 1HZ, all very heavy duty internals.

heavy duty hey so thast good news. and sounds like there hard to kill.

what would u look for on one that has done 250,000k's ?

a 3b with 250k kms is just getting worn in..

id check for smoke from blowby.. color of exhaust smoke, any excessive smoke under load.. leaks, etc..

no leaks anywere wich is suprising for a 70 but it is loosing water from somewere.

that engine breather shoots crap out though.

I just picked up a BJ70. It has the original 3B and 361,000 km on it. It blows absolutly no smoke under load or idle and is very tight. It is a welcome change from my Gu which has blew up 3 times before 40,000km.

I am looking at stretching the wheelbase from 90 inches up to 102 and running a A frame rear coil set up and a inverted radius arm front with X link plus sway bars for on road.

I will push the front diff forward about 10 inches and the rear diff back a bit. I will have to enlarge the rear wheel wells eventually running some 38's.

I may even look at a NA 1hZ in the future.

Are the BJ70 diffs the same as a 60 series diff. I understand that with some longfields axles and CV's a 60 diff is at least as strong as a GU diff.

Any advise on my ideas would be appreciated.

Evil 73 wrote:The 13bt is the factory turbo diesel in BJ70/73 .The 14bt was never an option in this model. I used to have FJ70 with a 3F petrol motor. i now own 3 73 series i have 2 FJ73's and 1x BJ73.

Ben

13bt only came in BJ74. I love my 13bt goes like a cut cat.

anyone know how much a 2nd hand 13bt is?
and is it a strait swap/

ur idea sounds wicked for ur truck dude.

known 2 wrote:anyone know how much a 2nd hand 13bt is?
and is it a strait swap/

ur idea sounds wicked for ur truck dude.

i think ive seen rollin imports advertise 13bt's for 5500... although im not 100% sure.. you should check the 4x4 trader as they advertise in there..

i WISH i had a 13bt in my 40.. but i'll just have to be content with a turbo'd 3b.. :(

I think the mounts are the same as a 3b.. 13bt is a strengthend 3b block..

For the $$, id be looking at a 1hz...or even better a 1hdt....see them around for 4000 (hdt) and 2500 for the 1hz...the bell from a 90 plus cruiser and input shaft or the whole box and dice is all you would need

shorty_f0rty wrote:

known 2 wrote:anyone know how much a 2nd hand 13bt is?
and is it a strait swap/

ur idea sounds wicked for ur truck dude.

i think ive seen rollin imports advertise 13bt's for 5500... although im not 100% sure.. you should check the 4x4 trader as they advertise in there..

i WISH i had a 13bt in my 40.. but i'll just have to be content with a turbo'd 3b.. :(

I think the mounts are the same as a 3b.. 13bt is a strengthend 3b block..

Good luck finding a secondhand one. I was trying to chase one for mine, after i had a bolt go through the intake and had no luck.
I was quoted around $7000 for secondhand one when ringing rollins imports.

The B family has a great reputation and are pretty common here for this vintage. 13B are less common but more powerfull direct injected and rotative pumps ..

Anycase I will turboed it without fear .. 12 PSI and you are done.