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There are quite a few problems with just coming to a conclusion of something based on threads in these forums. Those problems can skew one's results and you might come to a different conclusion(maybe not, but there is enough issues that it's a big maybe that you will).
I am just taking into account the number of threads that I've read on this forum regarding engine related issues for all of the Super Duty engines. It's not scientific but it is repeatable.
You go so far as to state facts about statistics. Then you go and declare both engines unreliable, as you are SURE that more than 5% of these engines have faults.
And then you say that you can't prove it!
Ha! I can't prove it but FMC can prove it. It would be great to know what problems have been identified to occur in more than 5% of the Super Duties. As of now, FMC has yet to bring their report card home for Mommy and Daddy to review.
I am just taking into account the number of threads that I've read on this forum regarding engine related issues for all of the Super Duty engines. It's not scientific but it is repeatable.
It's also assuming that what is said is above reproach.
Let's follow how you do it. Based on number of threads on tuners and what they perceived to be the resulting problems from those, no one should tune a 6.0. It just won't work, you have a tuner on there something is going to go wrong(based on the threads it will be headbolts). Their only connection is time: "I put a tuner on the truck, the truck had a headbolt problem, therefore, the tuner caused the headbolt problem". Possible yes, enough proof to show that it truly did happen based off that alone, no.
Most of what people say on here is typically based on that type of evidence. They don't account for other variables that they in fact could have done which caused their problem. Are their design flaws with the 6.0, yes there are, with proper knowledge you can actually have a good stock truck though without problems.
As to the 6.4, mileage has been shown to be a cheap fix, also if this is a DD were mileage is a must, get a car, not a truck. I don't know of the 6.4 having the same issues of the 6.0, the biggest issue that they had when they first came out was the flamethrowing issue that was quickly resolved.
Bottomline: you have to vet all information that you get here, not totally take it at face value.
It's also assuming that what is said is above reproach.
Let's follow how you do it. Based on number of threads on tuners and what they perceived to be the resulting problems from those, no one should tune a 6.0. It just won't work, you have a tuner on there something is going to go wrong(based on the threads it will be headbolts). Their only connection is time: "I put a tuner on the truck, the truck had a headbolt problem, therefore, the tuner caused the headbolt problem". Possible yes, enough proof to show that it truly did happen based off that alone, no.
Most of what people say on here is typically based on that type of evidence. They don't account for other variables that they in fact could have done which caused their problem. Are their design flaws with the 6.0, yes there are, with proper knowledge you can actually have a good stock truck though without problems.
As to the 6.4, mileage has been shown to be a cheap fix, also if this is a DD were mileage is a must, get a car, not a truck. I don't know of the 6.4 having the same issues of the 6.0, the biggest issue that they had when they first came out was the flamethrowing issue that was quickly resolved.
Bottomline: you have to vet all information that you get here, not totally take it at face value.
Ok, I see what you are saying... The fact that many PSD owners use performance adders like tuners directly contributes to the breakdown of these PSD engine. Sure, I agree with you 100%. I would love to install a supercharger on my 5.4L engine for better HP/TQ. By doing so, I may cause damage to the engine and I should not blame FMC if that were to occur.
Now, I don't know if the OP's PSD is stock or modified. If the engine is stock, then he may have a legitimate beef unless it is one of the known issues with the PSD engines. Known issues can be identified by reading the various TSB's for both diesel and gas engines. If the engine is modified and there is a connection between the modification and the engine failure, then he doesn't have a legitimate beef.
As for my comments being above reproach, I've already stated that my conclusions are not scientific and cannot be proven. They are based merely on observation.
Now, for my final comments. Virtually no one states that they selected the 6.4L or 6.0L PSD engine because it is "the most reliable" engine available in the Super Duties. They select the PSD engine for "performance" and/or for "status/resell value." IMO, the split is about 50/50. 50% of the PSD owners actually need the performance level of the PSD engine for either work or play. The other 50% selected the PSD engine because of its status and resell value. I'm not being critical of the people in the 2nd group... this is America. If you have the $$$ and desire, then go for it!
ahhh- back to the broken truck ---buddys 7.3 came into the shop once running like the end big knock,no power... said he just got fuel pumped 10gals of what looked like water..smelled like deisel... 4000$$ later 4new injecters.......... MmMhhMm
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