Fractured rods and tangless bearings. Bikes have been using them for years.
I suppose anything can fail.

 

I should wait 6-7 months to respond - like you did...
Fractured rods and PM rods are commonplace - not so much with tangless bearings to my knowledge. It makes no sense to rely solely upon the radial force / crush of the bearings alone to ensure the bearing stays seated. Eventually all fasteners (bolts) will stretch slightly and at that point a tangless bearing can start to work it's way loose and spin.
Not machining a tang in the rod is simply a cost-saving measure and will not add to the life of the engine - rather - it will limit the life of the engine..

 

I would be more concerned about a Top End failure in an early 6.7 rather than a Bottom End MB Failure. Considering the amount of 6.7s on the road today, and the relatively low failure rate of this Engine I'm not too worried about mine. Remember, most Owners don't post here to say how good, and trouble free their 6.7 runs. The ones that we hear about are from Owner's who have had a bad experience with their Truck.

 

They Are great Trucks !!!! Motor is great too. just want to find out if other people were having same Problems so i could talk to ford and sell if they would help me ? My Truck was at Gibbons Ford In PA. For Nine weeks ? They only have Two Diesel Techs ? And had Five plus trucks that needed Motors Some with Short Blocks Some with Long Blocks . Each truck has to come in cab off then take motor apart to see what went wrong . The GM was mad he had to fix it Because i did not buy it from him ? It was not my fault that truck broke down three 1/2 hours from my house. They first told me would take three weeks that was ok. But nine weeks with out my truck . So One main bearing went bad , And crack glow plug and injector was crack ? Picked truck up Saturday Open door Black grease all over floor matt on carpet . Truck is a King ranch Mint 2012 with 42,000 miles on it . Funny thing when i open hood looked around looked at Air cleaner the cover they had on it was Not mine ?? Had Writing on it Wix # And Mileage. I NEVER wrote on mine. I know it was a mistake But GM said tough luck and did not care . Would not believe me . I did not even use Wix filters . I do all the work on my truck . He made a comment and grab my hands and said I Do NOT see Holes in YOUR HANDS . I guess he meant JESUS C .

 

I call BS on this. There are plenty of owners that post about how much they like them. This seems to be what everybody says when somebody has a problem to make it sound like the problems are few and far between when in fact they are a lot more than they should be. The fact is, though the 6.7 is a great motor, it is also cause plenty of people plenty of headache.

 

Yup! The 6.7 is just a mechanical device. And ANY mechanical device can fail/ give problems. While most are good, there will be a few that are not. I had trouble with my '15 which I believe all started with an electronic glitch that they could not figure out and led to the failure of the complete fuel system. Ford did warranty it, but I no longer trusted the vehicle, because I did not KNOW that by replacing the fuel system would cure the problem, or if it was going to raise its ugly head someplace down the road!!
And by the way, I remember my Dad, bought a brand new 1958 Chevrolet with the holy grail of motors.......small block Chevy (283 C.I.D.) and had nothing but engine trouble with it! I don't remember all the details, but it seems like it was all about the rocker arms not oiling properly.

 

As the price of an item goes up, the expectations of perfection go up. But also the complexity associated with sophistication. Basically, you can have cheap, complex, or perfect - but only two of those at once.

 

This is very true. We expect a lot out of these rigs, perhaps too much sometimes

 

Huh?

Is that sort of like - Price / Performance / Quality - pick any two?

I do agree that the higher the price, the higher the expectation of quality...

 

Just took my truck in found out the crank bearings went out

 

The problem is that quality is not built into the base $35k unit. Just because you add $10-20k in Chrome,leather, sound and glass accessories, does not make the basic drive train any more reliable or, unfortunately, warrant you being treated like you paid $60 versus $35k for it initially.

 

How many Miles on your truck What did they tell you ? Warranty ?

 

This story doesn't make sense.

If the motor is thrashed and the truck is still under the powertrain warranty, the replacement motor should be an OEM reman long block, not an aftermarket short block.

 

Well Ford did not do that . They Said Heads were ok ? They said Metal did not get in them ? I did not trust them Thats why i sold the truck Next day when i got home . They told me if they did long block and when they send old parts back and heads were fine Ford would not pay Warranty. They Only give 12 months and 12,000 on New short Block or Long Block I was told Both are Reman

 

Just curious - You sold the truck, did you get you another new truck and what did you get?