What to do with a blown up engine

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

The copper sheet seals between the combustion chamber and rocker space, not fuel. The combustion gases overheat the oil under the tappet cover and these sticky blobs of burnt oil form the goo that ultimately will block the oil pump suction screen. Oil starvation which means not enough lubrication and reduced cooling under Pistons. The worn injectors on toothed hand allow larger and larger droplets of diesel to be injected into the combustion chamber poor atomisation means incomplete and poor combustion ultimately the net result is uncontrolled burning (bang!) of the diesel which cracks Pistons.

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

The copper sheet seals between the combustion chamber and rocker space, not fuel. The combustion gases overheat the oil under the tappet cover and these sticky blobs of burnt oil form the goo that ultimately will block the oil pump suction screen. Oil starvation which means not enough lubrication and reduced cooling under Pistons. The worn injectors on toothed hand allow larger and larger droplets of diesel to be injected into the combustion chamber poor atomisation means incomplete and poor combustion ultimately the net result is uncontrolled burning (bang!) of the diesel which cracks Pistons.

Hey,

Thanks for clarifying that, very nice explanation!

So on that basis we shouldn't expect to see any cracked pistons on young injectors?

Best

Mark

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Hey,

I meant changing the injectors every 80,000km, not the motor!

If you have new injectors with decent seats that don't leak, and drive your Prado as a 4wd in various conditions, then I'm sure you can put plenty of km's on the D4D with regular injector changes every 80,000km. I've also seen the figure of 80,000km from #### (an expert in these matters). You will also need to do some work on the egr system, and either reduce the egr flow with a small diameter plate or block it completely.

Have a look at these threads so you can get an idea of all the issues surrounding the injector problems and egr in the D4D;

Issues with the original Denso injectors;

http://www.pradopoint.com/showthread...-seats-Egr-Scv

Reducing the egr flow;

http://www.pradopoint.com/showthread...-000k-of-facts

Blanking the egr;

http://www.pradopoint.com/showthread...Diesel-Engines

Best

Mark

I have never seen a revised style coated seat leak, even over 200,000k. But I have seen them badly eroded & close.

Injectors every 120,000k. If they make it. Low Klm's vehicles can be out by around 80,000k, not as common.
Highway Klm's will last longer but 120k is the safe number. Why push you luck? Keep them fresh!!!

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Hey,

Thanks for clarifying that, very nice explanation!

So on that basis we shouldn't expect to see any cracked pistons on young injectors?

Best

Mark

Not common, but if you use crap fuel or get contaminated fuel it does happen.
Also combined with a dud piston.
Toyota confirmed my thinking, with that European service bulletin, basically combination of bad piston & bad injector.
Make either good & you should be ok. Make both good & it's 100% sweet.

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

how you drive the car (what fuel pressure the computer wants) and if you have a chip (once again fuel pressure) are some of the more important things.

So in the prefect world we are gentle on our car (computer is only asking for lower fuel pressures)

Correct me if I am wrong but the D4D runs a mechanical fuel pump that delivers constant high pressure fuel to the rail at all times whilst ignition is on, regardless of speed or load. The only way to boost fuel pressure is to restrict the relief at the end of the rail after the injectors where the unused fuel returns to the tank. Chips will deliver more fuel via longer opening times of the injector. The computer has no influence on fuel pressure other than to throw an error code or activate limp-home mode should there be a fuel leak or other interruption to fuel delivery flow.

[pjorek Advanced Member Find all posts View Profile Close pjorek]

So I ask the question how are Toyota or Denso responsible for excessive wear and tear caused by factors outside of their control? Sure these injectors are susceptible to what many consider "premature wear", but now we all know about the "issue" we can continue on with routine maintenance and call injectors what they always have been, and that is a consumable component the needs periodic maintenance or replacement.

How are Toyota and Denso responsible?

Injector value feedback reading MUST be part of every service - these things MUST be checked every 10k kms or every 6 months just like you change your oil. Why do I know about these issues? Because of websites such as this one however there are thousands of mums and dads who don't have the time or the need to look on the internet for any additional maintenance that might be required. If the Toyota service booklet tells them to change oil+filter every 10k kms or 6 months - well guess what, that's what most people will do. They trust the brand.

Toyota are responsible as this should be part of every service and unfortunately even today, it still is not.

[Guest Close Guest]

This thread is going way off original topic gents..
There is other threads that cater for your injector doom and gloom issues..


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[Corigator Avid PP Poster! Find all posts View Profile Close Corigator]

I have never seen a revised style coated seat leak, even over 200,000k. But I have seen them badly eroded & close.!

With all due respect to Piggy. I had to correct this post.
My new style number 3 injector seat failed after 15,000 km. Confirmed and replaced by Matt Bailey .

Now back to the topic.

[dhr29 Junior Member Find all posts View Profile Close dhr29]

Hi Guys,

Just to provide an update I sold the car last night for $9K.
The phone went nuts when we listed it on Gumtree.
People were going wild offering up to $12K sight unseen.
Anyway for better or worse it has gone, it was a great car/truck and we had many good time and travels in it.
After getting three independent estimates for $15K to fix it there was no doubt that it had to go.

Good luck everyone with all your injectors and EGRs I hope they give you better service than mine did.

[turtlewa Member Find all posts View Profile Close turtlewa]

Looking for a petrol now ?

[pjorek Advanced Member Find all posts View Profile Close pjorek]

Without sounding too intrusive, if they offered $12k why did you only take $9k?

Yes, what's the next choice?

[dhr29 Junior Member Find all posts View Profile Close dhr29]

Ha Ha, well my other cars are petrol, but I think the diesel is still the go for towing and off road.

[dhr29 Junior Member Find all posts View Profile Close dhr29]

OK we are people of our word, we advertised it for $9K and we held the car for an hour or so whilst the buyers came over.
Mind you I laughed at them when they tried to get us down to 8K.
In the interim people were ringing desperate to buy the car.
I doubt they would have stuck to their word if we held it for them, but we'll never know.

As for the new vehicle, we are probably joining all the others who are buying Disco 4s, I can't find anyone who knocks them.
Mind you people say the same about Prados and Pajeros; we would have considered the new Prado as Toyota have done a nice job updating them, the suspension is brilliant, but the power is disappointing. Some people say it's the same as the old 3.0 liter but we can't see it.
The twin turbo V6 in the Disco is very smooth and strong, the base spec 155kw is fine for our needs.
Combine that with air suspension, alloy body, 8 speed auto, standard tow bar, 3.5 tonne towing capacity etc etc.
Even my mechanic who hates Euro cars and diesels says buy one!

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Correct me if I am wrong but the D4D runs a mechanical fuel pump that delivers constant high pressure fuel to the rail at all times whilst ignition is on, regardless of speed or load. The only way to boost fuel pressure is to restrict the relief at the end of the rail after the injectors where the unused fuel returns to the tank. Chips will deliver more fuel via longer opening times of the injector. The computer has no influence on fuel pressure other than to throw an error code or activate limp-home mode should there be a fuel leak or other interruption to fuel delivery flow.

Sorry Dave, wrong.
The Scv is what control fuel pressure. Ranging from 35000kpa (idle) to 160000kpa (full noise).

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

With all due respect to Piggy. I had to correct this post.
My new style number 3 injector seat failed after 15,000 km. Confirmed and replaced by Matt Bailey .

Now back to the topic.

BDG had a few faulty sheets/ seats & a faulty fitter, I spoke to Matt about it & it's all sorted now.

My correction, I have never seen a revised seat fail when fitted correctly, clean, torqued to spec etc.
But that changed today. Pics coming in another thread.