HZJ77 JDM import and death wobble

[roscoFJ73]

They can when they're turboed. Many examples in Aus, especially the HZJ105 (when turboed). Hook up a heavy trailer on a hot day and hit a long hill. Doesn't end well.

They are more likely to melt a piston or drop a pre cup before they crack a head. An engine reconditioner told me that when they burst a radiator hose at high speed ,they sometimes warp a head but the rest of the engine gets destroyed as well. It takes a lot to damage the head, its not a weak point on a 1HZ.

 

[Gun Runner 5]

Based on my experience, an EGT (pyrometer) and Intercooler are excellent investments.

 

[roscoFJ73]

HZJ77 JDM import and death wobble

Most of the time it will be a castor problem, but you need to get all the other worn parts(if any) replaced first. JDM suspension lifts as RMP&O pointed out have a history of half assed componentry and workmanship. In Japan, its all about the lift, not about the handling. In Western Australia when they were still importing them , the traffic branch would not lic them until they were returned to stock. At least the Japanese seem to have stopped using those 4 inch anodised pink or blue aluminium shackles

I have searched a bit on the dearh wobble, currenrly not looking for answers about how to fix it mechanically, just if it's common in this series and if it's safe to try either of those methods until I can replace wear parts.

Its not uncommon, as I mentioned before about the castor, the suspension upgrade maybe ok when new. But as it sags with age and usage, the geometry changes and then you get death wobble. I had it on my my FJ73 (a shorter 2dr version of yours) about 5-6 years after I lifted it. The sag was barely noticeable. The shop had problems diagnosing it, so they made the castor worse to make the death wobble worse and then corrected it bit by bit . No problems after that. It is corrected with shims. My wobble was worst when towing

 

[clintnz]

It looks like you've already got some substantial castor shims in there (the wedges between the spring & axle) So as suggested above, I would check/replace all the steering rod ends & suspension bushes. Check the steering box, knuckles & hubs for play too.

Cheers
Clint

 

[bshanna]

Based on my experience, an EGT (pyrometer) and Intercooler are excellent investments.

At what point is the 1HZ turbo'd from toyota?

 

[Gun Runner 5]

At what point is the 1HZ turbo'd from toyota?

To my knowledge the 1HZ was never turbocharged from the factory.

 

[bshanna]

Thanks guys, i will be replacing just about all wear items soon.

Most of the time it will be a castor problem, but you need to get all the other worn parts(if any) replaced first. JDM suspension lifts as RMP&O pointed out have a history of half assed componentry and workmanship. In Japan, its all about the lift, not about the handling. In Western Australia when they were still importing them , the traffic branch would not lic them until they were returned to stock. At least the Japanese seem to have stopped using those 4 inch anodised pink or blue aluminium shackles



Its not uncommon, as I mentioned before about the castor, the suspension upgrade maybe ok when new. But as it sags with age and usage, the geometry changes and then you get death wobble. I had it on my my FJ73 (a shorter 2dr version of yours) about 5-6 years after I lifted it. The sag was barely noticeable. The shop had problems diagnosing it, so they made the castor worse to make the death wobble worse and then corrected it bit by bit . No problems after that. It is corrected with shims. My wobble was worst when towing

Any opinions on the lift on the truck?

I will definitely be replacing all the wear parts on the front. I appreciate everyone's feedback!

Does anyone have any thoughts on making it better if it happens whilst driving? I've got to drive it up to my buddy's shop and the chances of it wobbling are pretty high. Would speeding up or gentle swaying help?

 

[bshanna]

To my knowledge the 1HZ was never turbocharged from the factory.

i know it's just the internet which is always 100% true, this implies that toyota made a turbocharged version from the factory? Turbo charging the Toyota 1HZ Engine

...The trouble with the 1HZ is that it was never designed for being turbo-charged and when Toyota did build a turbo-charged version of it, they made some major changes to the piston design.

 

[Gun Runner 5]

i know it's just the internet which is always 100% true, this implies that toyota made a turbocharged version from the factory? Turbo charging the Toyota 1HZ Engine

Someone higher up the "knowledge food chain" can chime in but I'm fairly confident the 1HZ was never turbocharged by Toyota.

 

[Locked79]

To my knowledge the 1HZ was never turbocharged from the factory.

Not in a Landcruiser anyway.

 

[bshanna]

Not in a Landcruiser anyway.


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LOL a quick google of the toyota coaster and i know what my next vehicle will be.

 

[Gun Runner 5]

Not in a Landcruiser anyway.


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That's why folks seldom ask me technical questions.

 

[roscoFJ73]

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Does anyone have any thoughts on making it better if it happens whilst driving? I've got to drive it up to my buddy's shop and the chances of it wobbling are pretty high. Would speeding up or gentle swaying help?

Its called the death wobble for a reason, its dangerous. I think the best is to slow down, at least if you lose it, it wont hurt so much. The first time it happened to me was on the freeway towing a 6x4 box trailer with a 1HZ and gearbox in it. I was just slowing down from 100kph to 80 kph as I coming into the city on a 8 lane bridge. Scary.

 

[bshanna]

Its called the death wobble for a reason, its dangerous. I think the best is to slow down, at least if you lose it, it wont hurt so much. The first time it happened to me was on the freeway towing a 6x4 box trailer with a 1HZ and gearbox in it. I was just slowing down from 100kph to 80 kph as I coming into the city on a 8 lane bridge. Scary.

Yeah that's what i've been doing. Hopefully this is a very short term issue.

That sounds... harrowing.

 

[bshanna]

Someone higher up the "knowledge food chain" can chime in but I'm fairly confident the 1HZ was never turbocharged by Toyota.

So when people turbo these, is it just super common to use the CT26? And other OE (or OE looking) components? It's hard to see but it definitely looks like a CT26 housing.

 

[Gun Runner 5]

I used a Garrett however I assume the CT26 is suitable. It really depends on your goal and driving style.

 

[bshanna]

I used a Garrett however I assume the CT26 is suitable. It really depends on your goal and driving style.

how does your piping look for the i/c?

 

[Gun Runner 5]

Odd Iron Off Road designed a custom setup for my Cruiser utilizing an air/water Intercooler. Unfortunately I sold the Cruiser several weeks ago.

 

[bshanna]

Odd Iron Off Road designed a custom setup for my Cruiser utilizing an air/water Intercooler. Unfortunately I sold the Cruiser several weeks ago.

Nice! I'm just wondering what people do for intercoolers and piping, seems like space is limited.

 

[Gun Runner 5]

Very limited especially if you have factory A/C. Odd Iron utilized the space inside of the ARB brush bar for some of the components. No two of his designs are the same and he is not a proponent of "one size fits all" when it comes to turbos.