2011 F550, blown head gasket

[jgillott]

I wonder what the duty cycle of the EGR is. If at a steady light cruise it flows a lot (as opposed to a high boost situation EGR when it may be off) and the cooler leaks, I can see coolant getting into the cylinder in a bad way. I know our Mack MP7's "consume" coolant in mass quantities. Some say it's the EGR cooler, some say its the wet jacketed injectors. Either way sometimes they use a bucket a day before they get fixed. Since they're under warranty, I don't know what the fixes are. We've never had a catastrophic failure though.

That would make sense in theory. We don't currently have any 6. 7's at work, but when the coolers would go on our former 6. 0's, they would burn the coolant very quickly... . sometimes faster then you could get them back to the shop.

 

[Wayne M.]

It's quite amazing when you compare 6. 7's from Cummins and Ford, (can't say Navistar and more- Ford is making their own problems now!) It's unbelievable the contrast of the two. The Ford is just so dang complicated! We just got the print manual for that Super duty, and the study of the cooling system on that 6. 7 takes up pages. There's 2 split systems. So much of a chance for something to go wrong and IIRC, the intercooler is actually a water to air (or vice versa) exchanger, like the EGR cooler.
If only the people doing the purchasing would open their eyes and look the way we do, it'd be a no brainer.

I'd say before Dodge came out with the C&C, yes Ford did have a superior chassis in the Super Duty, but I think that is now about even.

 

[jgillott]

I am not sure what they were thinking in the design of that engine. After the mess they had with the post 7. 3L offerings, you would think they would have gone to something as simple as possible.

 

[SRay]

Likely ford engineers get the feeling of being technolgically advanced and cummins is in the Stone Age.

 

[Wayne M.]

Likely ford engineers get the feeling of being technolgically advanced and cummins is in the Stone Age.

Well, if you look at automotive history say, starting in the 50's with the Edsel and the retractable roof cars, Ford has always had a tendency to over engineer things. Just look at the ecoboost twin turbo stuff in the F150 today. Dodge does almost the same thing with the NA pentastar V6.
I had the opportunity to sit in on the Ford fleet 6. 0 class back when it was introduced. It was taught by a great guy who is also an engineer for Ford. All through the course he'd be making all sorts of excuses about why they did this and that and some obstacles they had to overcome. Especially when it came to how the cylinder head was designed and the EGR system.
I know the 6. 7 is what I'll call a "reverse flow" engine. By that I mean the exhaust is in the valley where the turbos are, and the intake is where the exhaust usually is on "V" config. The valve covers actually act as a manifold and funnel the air into the head. It's unconventional to say the least.

 

[Bill Stockard]

Well, if you look at automotive history say, starting in the 50's with the Edsel and the retractable roof cars, Ford has always had a tendency to over engineer things. Just look at the ecoboost twin turbo stuff in the F150 today. Dodge does almost the same thing with the NA pentastar V6.

I had the opportunity to sit in on the Ford fleet 6. 0 class back when it was introduced. It was taught by a great guy who is also an engineer for Ford. All through the course he'd be making all sorts of excuses about why they did this and that and some obstacles they had to overcome. Especially when it came to how the cylinder head was designed and the EGR system. .

I'll bet he didn't mention the demands Ford made on Navistar to cut costs on some of the engine components. Those "less expensive" components were the cause of many of the failures.



Bill

 

[RustyJC]

I know the 6. 7 is what I'll call a "reverse flow" engine. By that I mean the exhaust is in the valley where the turbos are, and the intake is where the exhaust usually is on "V" config. The valve covers actually act as a manifold and funnel the air into the head. It's unconventional to say the least.

Center exhaust configurations are conventional for large industrial V-design engines. This simplifies exhaust manifold and turbocharger designs. Here's an example of such an engine.

The two turbochargers are in the foreground with their air-to-water intercoolers directly beneath them. The turbos are fed by the thermal blanketed constant pressure exhaust manifold centered between the banks of the V, and the turbos exhaust into the large insulated pipe that's centered between the two blue air intake pipes feeding the 24" turbocharger compressor impellers.



Rusty

 

[Wayne M.]

I'll bet he didn't mention the demands Ford made on Navistar to cut costs on some of the engine components. Those "less expensive" components were the cause of many of the failures.

Bill

Mr. Stockard I knew you'd come in at some point. Actually they devoted a whole page about how the computers are different and such and not to confuse em. Ford and navistar had an electronics relationship going back to the DT 466E.

Rusty you got me there.

 

[Ncostello]

We've got 7 F350 6. 7L mini dumps at work. 2011 and 2012's. We've lost a turbo on one, and had two that shot injectors out of the head destroying everything in their path like a . 50cal round. As well as numerous brake rotor failures, horrible tire wear, and some transmission glitches. One ate a rear end too. And we're only getting single digit MPG's. All of them under 25K miles. So these diesels aren't looking too promising for hanging around like our previous round of 99-2002 Dodge 3500's that these replaced.



I'm not making fun of the Fords, as they all have horror stories nowadays. My point is that it's my belief the diesel engine is HATED. And it will ultimately be regulated out of use. The emission laws are a massive technoligical moving target that keeps getting further away. To which the cost to keep it viable and actually usable will make it go away on it's own. And the left will sit back and pat each other on the backs in having gotten rid of something they personally didn't like regardless of science.

 

[Wayne M.]

Over where I am, I'm kinda glad we don't have any Dodges. I'd have to witness them get destroyed! The F250 thats only weeks old has a nice hard crease in the bed already.

 

[Wingate]

From what I hear, this new short block had a couple of bent rods from hydraulic locking again!!. So, they have supposedly replaced the connecting rods, installed a new r/s cylinder head and on the reassembly trail. I just want my service truck back... . TBH, I do not care if its that one or another one... . Im just tired of working out of a truck that doesnt have all my stuff in it. !

While there, there were two 6. 7L engine cores bolted down to shipping skids being sent back to Ford, and a F350 in there with the cab off, two techs unbolting the engine getting ready to pull it... ...

Think Ill keep my junky old Dodge. . !

 

[Mikey-KE7LBB]

Frequently Overhauled, Rarely Driven

Fault Of R&D :-laf:-laf

(backwards) Driver Returns On Foot



Joking aside... The bean counters have got to see that the new Ford 6. 7s are junk!! Cheap truck + downtime seems to be WAY more expensive than expensive truck + virtually no downtime.



Maybe when they order new ones, they'll follow the class 6,7, & 8 trends and order Cummins engines with whatever chassis they happen to be in

 

[Wingate]

Joking aside... The bean counters have got to see that the new Ford 6. 7s are junk!! Cheap truck + downtime seems to be WAY more expensive than expensive truck + virtually no downtime.

I have been hearing rumors that the 6. 7L Scorpion engine will be phased out after 2014...

 

[Mikey-KE7LBB]

I have been hearing rumors that the 6. 7L Scorpion engine will be phased out after 2014...

Phased out of your company or phased out of Ford??? Details please!!

 

[Wayne M.]

I have been hearing rumors that the 6. 7L Scorpion engine will be phased out after 2014...

Talk about a sinkhole for Ford!

 

[Bill Stockard]

I have been hearing rumors that the 6. 7L Scorpion engine will be phased out after 2014...

Is that the year Fiat forces Iveco diesels on Ram and re-designed 2015 Super Duty Ford gets Cummins... since "Ford owns 'Cummings'"

Bill

 

[Wayne M.]

Bite your tongue!!! See what's going on with the 1500? See what happened with CNH? FPT makes an engine that'll fit! I think.

 

[Bill Stockard]

Bite your tongue!!! See what's going on with the 1500? See what happened with CNH? FPT makes an engine that'll fit! I think.

Yep, that's what I'm thinking about... don't laugh, worse things have happened.



Seriously, AFAIK, Cummins hasn't found a mass market for their light duty V8 and V6 diesels... Ford???



Bill

 

[Wayne M.]

Can anyone find out when the Chrysler /Cummins contract is up?

 

[rscurtis]

Maybe Ford should start looking at an engine from FPT.