I would be VERY interested in seeing any actual proof of these marks via image. Not because I don't believe you, but because it would be very educational since you have worked on so many of these engines. Are you able to provide any type of image to suggest contact is actually occuring?

I'm sorry, but my Masters in Aerospace Engineering and Thermodynamics makes my swollen brain hunger for more information.

 

Exactly. No way anyone would clean and replace a valve if they thought there was piston contact. Wouldn't happen. And that was what was happening early on according to some posts.
And suddenly now there are marks on the piston! Well, perhaps denying it for 100 posts isn't the best thing.
I've searched for pics without success. And Ford has said nothing about it.
But as the deaths grow into the thousands Ford will have to admit their failing.......

 

Oh I guess not only you discount what I say but ignor techs that have expressed frustration during the clean and reinstall campaign, that the guides were not being addressed, and the comments regarding the pistons and ford's hotline replies that if it's not perforated,, clean stem and reinstall. Get your head replaced with one who's guides have been checked and you can worry about something else.


Iron Cobra, nice to meet you. Did you attend that little technical institute up in Cambridge?
I bet you have a really fun job. I have a few friends at Lockheed and they have a lot of fun.
So pics, there have been some posted in the past on one site but were deleted after a riot broke out, they were not mine. I was asked not to return to one of the dealers when I posted pictures of brand new trucks with lots of rust that had not even left the lot yet. I also am not compensated by ford but rather the dealer principal who brought me in. I'm not going in on a controversial issue taking pictures and then posting pics. I have a business and family,I'm not jeopardizing that. Being in the field you are in, I'm sure you can appreciate that. Imagine GE has a turbo fan issue on a new engine. Here comes a owner on a forum or similar.... I want pictures, I want pictures now, I know I have been rude to you but I want it now. Now I believe you are asking for this politely and I thank you for being polite but I do not have what you request and if I did, I would not be posting it even if taking them was ok. I would not be willing to give up the ownership of those images.
You said,"having worked on so many of these engines" if by these you mean 6.7s, I have not. I have been brought in on 4 cases. I do not claim to be nor ever have claimed to be a 6.7 expert. I do know however know the root cause of this condition though.

 

If the tech cleaning valves noticed marks on the pistons there is no way he would bother to clean them. Why would he?
You can bet your life that if pistons were hitting valves there would be threads and pics all over the internet. Absolutely guaranteed.
Its happened to every other engine in or out of warranty, why not this one? Area 51?
Pics of the valve seat issue were all over the net, and these engines were under warranty. Pics of the HPFP failures were also all over the net as soon as they happened. And these were on very new vehicles.
Until then, just another Sasquatch sighting.
Meanwhile, some have affected trucks and hopefully the reflash or a new head will take care of this.

 

I did infact attend MIT for a while as well as Embry Riddle. Also, University of Florida for Pre Engineering.

Regarding the request for images, I'm interesting in knowing what the impact would look like in regards to the shape of the various parts coming in contact. Would it be a simple dent, scratch, gouge, stress fracture, or would the damage be limited to the less hardened component (that of which I'm not familiar with). Diesel engines, in noway, are my specialty. Neither are Turbine engines anylonger as I work in the Telecom field now.....interestly enough.

 

M.I.T is wonderful. How did you like sharing that library with the Harvard boys?LOL

Piston is a softer material. Though it's a softer material than the valve, as you know, the resistance to the harder material being moved is the dependang factor to it leaving impressions on the piston. The impressions left will range from needing to look extremely closely to very obvious. Marks will look like half circles. It's comes down to how strong the stiction is.
It generally does not offer much resistance to being moved out of its static state.

 

Well, for the few semesters i attended, they were starting to share quite a few classes and facilities. Two very different cultures and alot of competitiveness. MIT being the better school and all

 

Yep, all the M.I.T. guys belonged there. A lot of those Harvard guys didn't, as they still accept, help and push thru guys that are legacy.

 

When the head is replaced does the cab come off?

 

Generally they take the cab off, but all work can be done cab on.

 

Cab off is not necessary but in my opinion preferred for a major repair such as an engine or a cylinder head. For me it makes the job easier physically, I can get to everything for proper assembly and I am less likely to scratch up the truck or damage surrounding components. Some techs have no issues and just dive right in. Everything else on the engine is reasonably easy to access in chassis. Remember that the cab assembly was designed for removal and it has always gone smoothly in my shop. The only time there are issues or extra work is when there are customer add-ons or upfitter/body applications that hinder the process or prevent the cab from coming off at all.

 

I am having the same issues which is BS. I'm so pissed off at Ford. I spoke to customer relations and will know next week if they will buy my 2015 back with 16k miles. If not I am going to sue them!!! This is my third ford and have had problems with them all. I would suggest anyone with the 2015 Fords Having an issue and your still under warranty to call customer service and complain. Ford is aware of the problem but they can't fix it

 

Awesome first post. WELCOME! Glad to have you here. Stick around, learn, and share... Good luck with your new Ram.

There is a TSB about it and a software update in a couple months that will end the "issue" so no, Ford won't be buying it back.

Merry Christmas

 

While there are a few trucks having this problem I have to say that my 2015 has been the best truck I have ever owned.
Power, economy, luxury. This thing has it all.

 

Agreed. So far the past month I haven't had another regen issue. Hopefully it sorted itself out.