I have an 08 F250 with the 6.4 and was wondering if you guys with the new 6.7 have had less problems with the emmission systems. I love my 08 but I have really been dissapointed with all the issues I have had with the emmission systems. It will be in the shop Monday for a new EGR. I am seriously considering returning to the gas engine.

 

I just traded my F-350 on a 2011 F - 250. 6.4 to a 6.7. I have a little over 1,000 miles on the 6.7. To me, it appears in this short time a world of difference. So much more fuel mpg and quick, much quicker.

I think what has happened is that the 6.7 came after the 7.3 while the 6.0 and 6.4 engines were practice. I would get a regen about every 75 miles and real mileage less than 10 mpg on a trip with no trailer. 16.5 now and I feel I can trust the 6.7.

Rich

True, my F-350 was a dually and had 4.11 rears. the 2011 has 20" rubber and 3.55 rears.

 

Thanks Rich. I hope the new engine has less issues then the 6.4.
Again, thanks for the response.

 

Never had a 6.4 but did have a 6.0. Many guys with 6.4's have traded for the new 6.7. Most ot these 6.4 traders are very satisfied with their decision to trade for a 6.7. Look around here a little, there are many posts regarding this question. So far, the new engine is performing spectacularly.

 

Ricatic:

I presume you mean unhappy with the 6.4, trading for the 6.7. And I presume you mean, like myself, unhappy with the 6.0 trading for the 6.4.

Not an English teacher, but your double negative NOT believe...NOT very satisfied confuses this write, after three glasses of wine, easily confused!

But, if your conclusion is that the 6.7 is peforming spectacturaly, then I agree completely.

I just hope I don't get one more oil leak ( as from the 6.0 & 6.4). My poor garage flloor can take NO MORE.

Rich

 

I know I want one!

 

6.0 to 6.7 here too.

Seems like I heard more complaints about fuel mileage from the 6.4 owners, as opposed to other issues. My '05 6.0 got pretty decent mileage by comparison, but every time I towed with it, I could figure on an EGR problem. My last tow with the 6.0 had two EGR failures on a 5K mile trip, and with the extended warranty about to expire, that was the last straw. I would have even gone to a 6.4 if the 6.7 hadn't come out.

Joe

 

I have said this before but I will repeat it. The number of 6.0 owners, including guy's like me who had a problem child engine, who have remained loyal to Ford boggles the mind of the other brand bashers.

 

I had a tad over 150K miles on my 6.4. Engine never let me down, always had plenty of power and I had an outstanding experience with it. Only problems I had were radiators, it was on it's 4th one when I traded it in on the 6.7.

While I don't have anything bad to say about the 6.4 I do believe it to be more fragile and finicky that the 6.7 so far. I also think that the 6.4 works harder to run, uses more energy just to sustain itself. Lots of heat and fuel.

The 6.7 seems to be much more "relaxed" in the way it operates. You can't feel or hear a regen cycle. My style of driving only produces an "active regen" every couple thousand miles. It does "passive regen" almost constantly as I run it. (It must because I literally go over 1,000 miles between a regen that warrants the message center to tell me)

The EGR and coolers system is much less of an "obstacle" for the engine to run efficiently and more of a help. I think due to the Urea system.

The turbo set-up is totally different, as you may know. All the plumbing is designed to produce instant boost, no lag, and smooth power delivery. Much improved system over the Navistar 6.4.

The CAC is water cooled, which so far in my case has been much less of an obstacle for performance. The air cooled one on my 6.4 (went through 2 of them) always constricted the engine output when I needed 100% for towing purposes. My 6.4 would stutter (not the water stutter) from being starved for air, the MAF would cut off the fuel to keep the ratio within spec.

The coolant system is more complicated but so far is a good design. 2 independent systems, IIRC 1 for the engine block/oil and another for the CAC/Trans/EGR. If I am wrong about the split duties, it can be found in the 6.7 Tech Folder.

The Urea system which adds yet another "system" to complicate things is actually a significant help to the motor. This is the solution to making the 6.7 more relaxed, it can emit more pollution which gives us a better engine. The dirtier air is then treated inside the exhaust system, freeing up the engine.

Anyway, you didn't ask for quite so much info so I'll stop. My honest opinion for you is that the 6.7 is an engine that will provide better service than a 6.4.

 

Thanks for a great comparison post from someone who has had both trucks.

 

I completely agree with ruschejj, the new 6.7L is a solid improvement over the 6.4L.

I, too, had a good experience with my 6.4L, but I was afraid of owning it outside the warranty period. Never got that far before it tragically died, but I was planning on selling it before 100,000 miles due to the concern of the cost of a catastrophic failure.

The 6.7L seems to be a much more solid engine from the start than the 6.4L ever was. Time will tell how good it really is, but I suspect I'll be much less concerned about keeping this past the 100,000 mile warranty period.

 

I remember when a few people told me that the 6.4 was the best thing ever and that i was a lier saying i had many issues with the 6.4
It is funny seeing these folks buying the 6.7 and saying the 6.4 was not all that!! I used to say i had regens every 100 miles and those folks
said they never remember getting a regen. and i must be running the wrong fuel, man things have changed.


Any way there is No comparision between the two
Although i only have 1800 miles on my 6.7 and most of the issues with my 6.4 started around 10K if i remember right.

Go Back to the 6.4 site and look at my early posts

I get way less regens with the 6.7
I get way better MPG with the 6.7
I like way the torque curve is on the 6.7
SO far So good

I buy a new truck every 3 to 4 years normally and have sence 93 and have owned Ford trucks sence the early 80's
This truck is a home run So far

I hope to see a tuner that helps what little lag there is and add more low end power!

maybe i will get an appology

 

Tom:
I do vividly remember your problems. Perhaps your writings were a little caustic at the beginning as I was one who thought you were bashing. If you reread your posts you will find that some of your complaints were nebulous at best. You did apparently win in the end, but I question your win. Normally a per mile charge kills the victory of a "LEMON LAW" return.

Memory is that you next got a V-10. And now back to a diesel. My only point is that you are much like the rest of us in loyalty to FORD when sometimes they do turn their back on repeat customers.

Good luck in your 6.7. I too hope my experiences will be better after two 6.0 s and one 6.4.
Rich

 

I have had the '07 6.0 (no problems at all) with 40k, and the '10 6.4 with 20k (seemed under powered with the 3.55s but no problems). Obviously, the new motors are way too new to judge the long term reliability, but as far as put together well, I have about 2k miles on my '11 6.7 and can tell you the new configuration (new engine, transmission combination) is the best yet. My only complaint is that I opted for the locking rear diff, and miss the limited slip, because on acceleration, I keep breaking the rear wheels loose (giggle, giggle).

 

...just pull that button on the dash