1PZ engine - a couple questions

[JuanJ]

Hello,

I found a 1991 PZJ70 (actually, I have seen it every once in a while for the last few years and at last I was able to get a closer look.) I will try to post a picture later.

The truck looks good. No rust, needs new tires and some care, typical for a unit of its age. The engine has 380,000 km, and available records show it has not been repaired. No strange noises, and it pulls hard. In fact, it reminded me of the Daihatsus/Hinos I once drove in the tropics.

From what I found after a search here, the 1PZ engine is bulletproof. Wayne likes it, now I understand why. However, two questions remain. How long before repairing it? Are parts still available?






Juan

 

[Dougal]

The 1PZ is as bulletproof as a 1HZ. Take that as you will. I beleive some parts are a problem as this engine was only built for a short time. Look for a replacement head and tell us how you get on.

 

[roscoFJ73]

Nothing wrong with them. You can get an aftermarket rebuild kit from Engines Australia for about $1300,which is $300 dearer than the 6 cyl 1HZ because of the low volume and the gaskets having to be especially cut.
At 380k it could kick on for another 200k or it could get tired very quickly.Its somehing you need to factor in on the purchase price.

Some owners report frustration with the dual mass flywheel.
I think they have the R151 gearbox.

 

[JuanJ]

Hello,

Dougal: duly noted. I still have to think about this, and I will keep the head in the parts list.

Thanks Rosco. The owner thought it was a 1HZ engine; in fact the truck is erroneously registered as such.

Regarding mileage, at the rate I drive it will be a few years before I make 200k. Anyway, the possibility of a sudden death is to be taken into account as well.

I am still thinking aout it, and appreciate your insight. It would be a nice second vehicle, though.




Juan

 

[JuanJ]

Hello,

As promised, a couple pictures. Threads are useless without them.

It is what I have for now. One exterior, one interior.

Notice the rear jump seats. On the other hand, I don't like the bullbar much.





Juan

 

[ForealBoreal]

Whats the damage on it if you don't mind me asking?

 

[crushers]

Dougal and his dishin the HZ just cause it isn't DI.
the PZ IS a nice engine, (the HZ is a beautiful engine)
it responds well to a turbo
the dual mass can be a very expensive flywheel so IF it goes south then install a HZ flywheel and clutch kit. rumor has it that this might result in minor vibration at low idle. :shrug:
i have yet to see a cracked head, busted crank or even a bad pump on a PZ.

if you don't want it then send me the contact info, i could use a winter beater.

 

[JuanJ]

Hello,

There are two PZJ70s in my neck of the woods, and this is one of them.

FB: damage is not that bad. Needs new tyres/battery/steering wheel, the heater fan needs maintenance, temp gauge is not working, to name a few. Not surprisingly, AC still blows cold air.

It would make a good restoration project. Or a winter beater.

Wayne: good to hear from you. Your insights on how good an engine the 1PZ is were one of the reasons why I took a closer look on this truck. And yes, it could use a turbo. This unit has a strong pull, though. Not bad for its age.

However, the mileage made me wonder.

The owner was convinced it was a 1HZ-powered rig and the registration papers state the same. Bureaucrats at the local DMV firmly believe Land Cruisers still have 6-cylinder, 4.0-liter engines like the ones on early 40 Series. When an unfamiliar engine appears, by default they enter 6 cylinder, 4.0 L, on the data forms.

I still have a couple days to think this through. I could even get it, make some fixes and deliver it to Wayne... Now that is interesting.





Juan

 

[crushers]

yes,
that would be interesting.

 

[JuanJ]

Hello Wayne,

You would have to let me enjoy it first...

As I wrote, still thinking on it.




Juan

 

[crushers]

well of course, now remember it is calling for snow tonight ... so don't play too long.

 

[roscoFJ73]

Hello,

There are two PZJ70s in my neck of the woods, and this is one of them.

FB: damage is not that bad. Needs new tyres/battery/steering wheel, the heater fan needs maintenance, temp gauge is not working, to name a few. Not surprisingly, AC still blows cold air.

It would make a good restoration project. Or a winter beater.

Wayne: good to hear from you. Your insights on how good an engine the 1PZ is were one of the reasons why I took a closer look on this truck. And yes, it could use a turbo. This unit has a strong pull, though. Not bad for its age.

However, the mileage made me wonder.

The owner was convinced it was a 1HZ-powered rig and the registration papers state the same. Bureaucrats at the local DMV firmly believe Land Cruisers still have 6-cylinder, 4.0-liter engines like the ones on early 40 Series. When an unfamiliar engine appears, by default they enter 6 cylinder, 4.0 L, on the data forms.

I still have a couple days to think this through. I could even get it, make some fixes and deliver it to Wayne... Now that is interesting.





Juan

A compression test would be the only way to gauge engine condition.

In regards to having the correct engine on rego papers,you would save a few dollars here by having the lower HP engine.
Maybe it would be the same for you if they have a taxable HP formula.

 

[crushers]

i used to feel the same way, Rosco, till i tore into the 3B that had excellent compression but poor maintenance.
now a good compression gives you a decent hint of the condition of the engine.

 

[roscoFJ73]

i used to feel the same way, Rosco, till i tore into the 3B that had excellent compression but poor maintenance.
now a good compression gives you a decent hint of the condition of the engine.

Yes,Ive seen engines with good compression and worn out big ends and main bearings.
Sometimes sludge build up around the rings can boost compression figures.

 

[JuanJ]

Hello,

So sludge has the same effect as oil when it comes to compression (you know, if the compression value goes up after adding some oil, then the engine needs rebuilding.) Good to know.

I will try to make a compression test on the engine.

Still undecided.




Juan

 

[crushers]

carbon build up will do the same ...