Stats on injector problems with the 1KD-FTV.

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

This thread is always a good read.

My question-

Why is there such a drama with these seals in the D4D when there seems to be no problems with a non D4D, specifically the 1HDFTE.

After all they are both Direct Injection Diesels. Surely the seal set up is similar?

Drew

I'm not sure why all the old copper seat eventually leak, they just do.
The good news is they were improved about 7 years ago, so now it's mainly crd injector wear that needs to be monitored.
1kd was born in 2000, took them 7 years to fix them mmmmm.........
No recall letter though, yes that is very poor...........

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

I'm not sure why all the old copper seat eventually leak, they just do.
The good news is they were improved about 7 years ago, so now it's mainly crd injector wear that needs to be monitored.
1kd was born in 2000, took them 7 years to fix them mmmmm.........
No recall letter though, yes that is very poor...........

Cool. Thanks for the reply ####.

Mate I think its certainly strange that the CRD seats need monitoring and the NON CRD seats seam ok.
After all my direct injection 1HDFTE donk in the troopster is a 2003 engine, but they don't seem to be an issue.
I just got my injectors replaced at 297ks and the diesel bloke seem to think the injectors and seats were from factory.
As both motors left the factory with copper seats, I find it hard to swallow that a D4D seat can fail so quickly.

I just like to ask weird questions... its a bit crappy on toyos behalf to throw this on their loyal customers.

Still reading this thread cos it stimulates my mind lol.

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

Would like to hear Baileys thoughts on this but from what I have read the new sheets are still copper but they are aluminised. This is done to reflect the heat plus aluminium oxide has a much higher melting point than copper or copper oxide and the base aluminium. Something like 1000C compared to 500 or 600C. Given that we have a 3L four cylinder engine producing comparable power and torque to a 4.2 L six cylinder that tells me that combustion temperatures and pressures are higher in the smaller engine. Now throw into the equation the four or five actual fuel injection phases that the D4D performs you have some lean burn going on to reduce NOx and more efficiently use the fuel, again higher localised temperatures. I think the higher temperatures is what is causing the tried and true copper seats to fail. Distortion, melting etc. the new sheets can reflect the heat better and don't suffer the same fate. Or I could be in need of alcohol.

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

Would like to hear Baileys thoughts on this but from what I have read the new sheets are still copper but they are aluminised. This is done to reflect the heat plus aluminium oxide has a much higher melting point than copper or copper oxide and the base aluminium. Something like 1000C compared to 500 or 600C. Given that we have a 3L four cylinder engine producing comparable power and torque to a 4.2 L six cylinder that tells me that combustion temperatures and pressures are higher in the smaller engine. Now throw into the equation the four or five actual fuel injection phases that the D4D performs you have some lean burn going on to reduce NOx and more efficiently use the fuel, again higher localised temperatures. I think the higher temperatures is what is causing the tried and true copper seats to fail. Distortion, melting etc. the new sheets can reflect the heat better and don't suffer the same fate. Or I could be in need of alcohol.

Wow, I certainly need a drink now and go on mj, pour yourself one too.
I like the way you think. Your technical answer would explain why the copper seats last ok in a non d4d engine.
There is certainly a huge difference in temperatures and even how the injectors time their fueling.
Cheers mj, im satisfied now....

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

Just did a quick and rough comparison and assuming each cylinder provides an even proportion of the torque the pressure in the 1KD cylinders is just on 1.5x that of the 1HD at peak torque.

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Would like to hear Baileys thoughts on this but from what I have read the new sheets are still copper but they are aluminised. This is done to reflect the heat plus aluminium oxide has a much higher melting point than copper or copper oxide and the base aluminium. Something like 1000C compared to 500 or 600C. Given that we have a 3L four cylinder engine producing comparable power and torque to a 4.2 L six cylinder that tells me that combustion temperatures and pressures are higher in the smaller engine. Now throw into the equation the four or five actual fuel injection phases that the D4D performs you have some lean burn going on to reduce NOx and more efficiently use the fuel, again higher localised temperatures. I think the higher temperatures is what is causing the tried and true copper seats to fail. Distortion, melting etc. the new sheets can reflect the heat better and don't suffer the same fate. Or I could be in need of alcohol.

That would be about it :-) nice work.

Did another one today, 11/06 with copper, 2 leaking, 3rd one just holding.
Poor bugger Prado owners just driving around, getting Toyo service for years & not informed or warned.
I just hope not too much damage was done & it lasts a long while yet for them.
How can I warn these people.......? It's just fa$&ed

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

Just did a quick and rough comparison and assuming each cylinder provides an even proportion of the torque the pressure in the 1KD cylinders is just on 1.5x that of the 1HD at peak torque.

Well higher compression does mean higher heat... I am very happy with your explanation mj. Thankyou.

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Here drew have a drink while you look at these.



I will try to remember to get a pic of how good the newer ally coated seats work.

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

Man that is unbelievable, although I totally believe what I see...

Geez that top injector must have been leaking for a long time.

YUK.

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Man that is unbelievable, although I totally believe what I see...

Geez that top injector must have been leaking for a long time.

YUK.

Roger that,,

Number 2 was the really stuck one,, it didnt have the oil on it yet.