3B vs 1HZ

[crushers]

interesting conversaion with Mark at ENS toyota this morning. for those of you that worship the 3B as the only bullet proof Toyota diesel, Mark rates the 1HZ in the same league.
further interesting info, the PZ is just as tough and Mark said he would have no worries about driving one on the street. he puts the bad reputation of the PZ on the tranny/t/case more than the engine and he also stated 90% of the problems were directly related to mine abuse.

i get my PZ back next week...

cheers

[lshobie]

I've been wondering about the PZJ JDM's, there are many really nice ones that will be available in the future from Japan. With the HZJ's and BJ7..'s generally being harder to find now the PZJ should be an obvious option to the cdn market. The PZJ 70 soft tops are pretty nice vehicles.

Parts are available from ENS and general parts and peices from G and S, so that is half the battle.

What are peoples thoughts on this.

[crushers]

all i can say is i have 2 PZJ trucks now... a 75 and a 77...

[lshobie]

I think they will start rolling off the docks pretty soon

[Eric Winkworth]

So let me get this straight, a 20 year old 3B is as tough as a brand new 1HZ? I know there is alot of difference in power, but I think that says alot about the old 3B's, doesn't it? In 20 years (I know the 3B's have been around longer) they havin't developed a more reliable motor, ummmmmmmm!

I think the 1HZ should be way more reliable!

[crushers]

yep, that old hunk of iron has a reputation that is hard to beat...
i forgot to ask him how many heads he had sold during the 85-89 mine run...
;^)

[Eric Winkworth]

I take it the 1HZ doesn't have any problems with heads, then why wouldn't he say it is more reliable? I am not trying to annoy you Wayne, but I do think you seeing all the different trucks coming into your shop, with head problems, makes you hate the old 3B. Does the 1HZ have timing gears? are there any known problems with them?

[crushers]

1HZ is a timing belt.
Mark is fond of hte old 3B
i am not really bitter towards the old hunk of iron, the opposite really, it really is old faithful for many. it is just when someone brags up an engine with out noting it's faults over and over it just get to me...

the old "b" series really helped make the land cruiser the reputable rig it has been known for... of course the old "F" series gasser made the reputation long before the diesel came along...
cheers

[Greg_B]

Originally Posted by crushers

it is just when someone brags up an engine with out noting it's faults over and over it just get to me...cheers

You mean like the 2LT?




















Pok'n ya Wayne...

gb

[Greg_B]

The standard discourse I have heard over the years is the 1HZ is the replacement for the 3rd world tough Toyota 3B diesel. That is where the debate and discussion starts.

There are certainly pros and cons to both.

gb

[Behemoth60]

Originally Posted by crushers

it is just when someone brags up an engine with out noting it's faults over and over it just get to me...

Name one liquid cooled engines out there can run without coolant in the head without developing some major problem?

To say that a 3B has a faulty head because they crack when overheated is like syaying... well, I don't know what it's like, but it's dumb...

Peter Straub

[Radd Cruisers]

Originally Posted by Behemoth60

Name one liquid cooled engines out there can run without coolant in the head without developing some major problem?

To say that a 3B has a faulty head because they crack when overheated is like syaying... well, I don't know what it's like, but it's dumb...

Peter Straub

I have had over 20 3Bs, never had a head problem on any of the, some have near 500K on them.

[crustyBJ60]

one more vote for the 3b

it is what it is, i think i'm going to stick with this little engine for a long long time, or untill they all crap out (my money is on a long time)

it's great on fuel, and it gets me and all my junk, dogs, etc.. there and back, everyday and every trip. and they just keep getting cheaper and cheaper!

crusty

[Radd Cruisers]

Originally Posted by crustyBJ60

one more vote for the 3b

it is what it is, i think i'm going to stick with this little engine for a long long time, or untill they all crap out (my money is on a long time)

it's great on fuel, and it gets me and all my junk, dogs, etc.. there and back, everyday and every trip. and they just keep getting cheaper and cheaper!

crusty

Ahhhh we woke ya up Crusty................

Good to hear ya alive and kicking, now liven things up around here and raise some shit...

[crushers]

Originally Posted by Behemoth60

Name one liquid cooled engines out there can run without coolant in the head without developing some major problem?

To say that a 3B has a faulty head because they crack when overheated is like syaying... well, I don't know what it's like, but it's dumb...

Peter Straub

okay, how many have yo pulled apart? how many have you owned? the heads crack, simple as that. as far asi i know you are still way under 10 units?
your statement is just dumb..
;^)

[crushers]

Originally Posted by Radd Cruisers

I have had over 20 3Bs, never had a head problem on any of the, some have near 500K on them.

you pulled all 20 apart? and not a signle one had head cracks or cracks in the prechambers?
i have owned enough 3Bs that i lost count years ago.
yep they are tough old engines and VERY seldom will they not get you home but they are dated, sluggish, and getting harder to find parts ofr each year that passes...

[Vegard]

Crushers, have you pulled equally many and other Toyota diesels apart and inspected them for cracks? If so, did they have as many kms and years on them?

[crushers]

yes, i have pulled a great number (more than i care to remember) of B and 3B engines apart over the last 24 years and, yes, most did have cracks between the valves. yes most, if not all had cracks in the precups.
these ranged from 150,000km to 600,000km.
the bottom ends are darn near bullet proof, the weakness lies in the head design.

[Tapage]

Originally Posted by Greg_B

The standard discourse I have heard over the years is the 1HZ is the replacement for the 3rd world tough Toyota 3B diesel. That is where the debate and discussion starts.

There are certainly pros and cons to both.

gb

That's the point .. Both are good engines, but hey old engines need to go rest. Is normal, as normal is everybody that have a old carburated 350 want to go injected.

Is the normal evoultion .. my vote 1HZ.

[Vegard]

Originally Posted by crushers

yes, i have pulled a great number (more than i care to remember) of B and 3B engines apart over the last 24 years and, yes, most did have cracks between the valves. yes most, if not all had cracks in the precups.
these ranged from 150,000km to 600,000km.
the bottom ends are darn near bullet proof, the weakness lies in the head design.

I meant to ask if you had inspected other Toyota diesel engines, and if so, did they have comparable mileage and age?

[crushers]

sorry, i misunderstood.

nope, i have to admit my experience is just with the old 3B, i have pulled apart a few 2H and one 2LT so that is not enough to make any form of judgement...
oh and lots of the F/2F engines...
cheers

[Vegard]

Thanks!

In Norway there are many 2L-Ts and 2H engines, but only a few 3Bs. Anyway, there is allways a short of 2L-T heads, because the old ones cracked. The 2H seems to have very few problems, despite more kms. The 2L-Ts typically have 250-300 thousand kms on them.

3Bs are not known to have any problems, but I guess there are not more than around 100-130 cruisers with this engine here. I know of about 40 of these, the one with the highest mileage beeing a bj75 rescue veichle with 700 000kms and a worn out H55F.


A friend of mine who is a cruiser-enthusiast and a Toyota mechanic told me to mount an intercooler at the same time as I turbo my 3B. The reason was that this engine was sensible to heat he told me.

[brownbear]

Originally Posted by crushers

i forgot to ask him how many heads he had sold during the 85-89 mine run...
;^)

probably very few. if underground, they turn them way down on fuel(no smoke underground if possible). there is no overheating period. They idle forever at time,

They are not running at high rpms. Or on long hills under highway speeds.

I would be suprised if any heads were bought up during that period.

Natural progression does go to the 1HZ engine.

3B are very underpowered for 5000lbs trucks. But I am not switching yet.

When the time comes it will get a 1HZ, or I will buy a JDM with one.

For now the fuel sipping 3B is the best choice..........

[crushers]

very good points...

[Radd Cruisers]

I will drag this post up again to beat a dead horse once more.


If I were building a truck and had to choose engines, no brainer for me it would be the 1HZ.

Now if I had a budget and had to pay 3000.00 for a 3B H55 split case combo(lets say over 200000KM) over a 7500.00 1HZ H55 splitcase(usually with vacume shift)(80 000KM), it may be a deal breaker.


Now if a customer came to me and asked which I would use, I would push real hard for the 1HZ.

After driving the 1HZ for a month now in FJ45, I just plain love that engine, smooth and very quite. Cold starts are little more than a almost invisible puff of smoke.


Also after standing beside Waynes 75 series at Pismo, I was floored at how unreal quite his rig was, not sure if it was the turbo or PI???

My 2 canuck pennies.