Toyota D4D engine woes

[altec]

bitok, you just contradicted yourself. I questioned what you said that I made a blanket conclusion that d4d is superior to other diesels inside other auv, and you even highlighted that part of the sentence, but you deliberately did not highlight the 1st part of the sentence, which is ASIDE FROM THE FUEL PUMP PROBLEM. LET ME SAY IT AGAIN ALSO, my conclusion that D4D is superior is based on the specs of this engine versus the other direct and nondirect injection engine in its class, EXCEPT for the ACKNOWLEDGED FUEL PUMP PROBLEM. So don't think that people will accept your opinion by quoting and emphasizing based on PART of someone's statement, which you did and questioning in effect what that person said, specifically my statement. So where is that blanket conclusion? I think you were misled to think my statement said that d4d is superior, period. It is not, mainly because of the problems mentioned.

You said you own a toyota, what model may I ask? Because I think it's not a D4D, and assuming that you don't, therefore, what you mentioned about the spring in the D4d is based on someone else's experience, and your comments about the 4d56 is based on your experience with the adventure. The reason why mitsubishi maintained the 4d56 line up is that's the engine model they have for the 2.5L line. That's why after the 4d56, they replaced it with the 4m40, a 2.8L. The length of time the engine design was put in commercial use does not automatically mean that it is superior in terms of reliability and durability as the reason why it was used for such a period of time. I have a master list of the whole mitsu diesel engine line from their 4 cylinder models up to engines used in their trucks. I also have the same master list for isuzu, toyota, nissan, and hino, excluding their crdi lines. Diesels are expected to last much longer, anything less than 200K in between overhauls show a weakness. And that is where Toyota's indirect diesel engines are- they struggle to go beyond 200K before needing overhaul, heck, the 2C engine struggles to go beyond 150K before overhaul. 4d56? Yes, they have proven to be better than toyota's, but not necessarily when compared to isuzu, hino, and even nissan. You may say that your actual experience with 4d56 is quite good, and that means you have treated your engine very well and have been rewarded with good service, but there are also several other not good experiences with 4d56, because the 4d56 needs more maintenance than other diesels, because the 4d56 is an indirect injection engine, and still uses a timing belt, unlike isuzu that uses a timing gear and direct injection. Then again, that's in hindsight, considering the 4d56 has been in existence for more than a decade, nearing two.

Again, following that line of thought, I don't argue with you that the d4d has yet to prove itself superior in terms of reliability and durability, and the fuel pump problem is not a good start. As what Jaeger pointed out in the websites he provided that seems to be in other countries there are crdi systems from other makers that are having problems due to lubricity issues. And this is the point we are trying to make, and I believe that's also partially what Mikey177 meant in his reply to you. It really sucks if the owners have to experience problems and having to go about our own way of finding the solution when it should be the manufacturers doing double time to correct it. It would be better for manufacturers like toyota to emphasize the lubricity concerns that other crdi makers reported and work from there.

I want to emphasize here is that with MY innova, I did experience that choking problem, step by step, to the letter. But it disappeared coincidentally after a few loads with biodiesel. Call it by accident if you wish, but so far so good. I would rather think that the use of biodiesel has arrested the spring's malfunction, thus giving me trouble free use of my innova. Now, will I stop using bd in my innova just to see if the choking problem will recur and finally prove my theory? It's like saying will you stop taking your heart medicine to really check if your heart really has a problem? Sure, toyota can charge it under warranty, but I'd rather continue using BD in my D4D unless someone can prove to me otherwise. I've not had the choking problem recur after over 10,000 kms with BD. And note unlike Larshell and others who had their ECU reset or their pump replaced to stop the choking, mine just went away.