HPFP failures
E =MV squared.... you double the RPM's, you quadruple the load laterally on that piston and roller in the HPFP bore.... it aggravates the wear... everything happens with more RPM's in a TDI.... it is a high rpm diesel motor design, it really needs 52 cetane to get good mpg on the highway while cruising.
A 6.7 redlines at what 3300 rpm, maybe 3500? There's your sign.

Surely, there are some mechanical engineers in here and not all a bunch of well monied retired group of Old Farts?
6.7 redlines at 4000 rpm
All things eventually fail but with the extreme pressure the hardware components are under, it feels like to me these expensive, well built components will still fail early.
I too have a difficult time realizing the pressures involved.
That’s why I was wondering if the manufacture of the major fuel system components (with different life spans I’m sure) actually report a MTBF.
The variables are so different region to region (fuel quality, climate, use, etc.) they may not even feel reporting a number is helpful.
TDIClub Forums - View Single Post - The Delphi DFP 6 High Pressure Fuel Pump Thread.
If you take a look at this post on TDI club, you can see the differences in the piston design, and the square bore for the shoe follower on the Dellphi DFP 6 versus the round bored "top hat" roller follower on the Bosch CP 4.1. You then have to ask "What is preventing that roller from going out of alignment with the cam?" Nothing, nothing at all, and that is exactly what Delphi addressed in their pump design... things that make you go Hmmm?
TDIClub Forums - View Single Post - The Delphi DFP 6 High Pressure Fuel Pump Thread.
If you take a look at this post on TDI club, you can see the differences in the piston design, and the square bore for the shoe follower on the Dellphi DFP 6 versus the round bored "top hat" roller follower on the Bosch CP 4.1. You then have to ask "What is preventing that roller from going out of alignment with the cam?" Nothing, nothing at all, and that is exactly what Delphi addressed in their pump design... things that make you go Hmmm?
Do some searching and tell me how many Ford 6.7L and GM Duramax CP4.2 failures you find. There aren't very many.
Now I am going to offer up what will be a very unpopular opinion, but it has been a mantra of mine for many years. There are 3 sides to every story. The vehicle owner's side, Ford's side and ultimately the truth which probably lies somewhere in between the first two. Many details we will never know, yet a lot of people have drawn some pretty harsh conclusions based on what little that we know.
The first dealer reported rust in the fuel system. Did the second dealer and/or the FSE find no evidence of rust? I would think if it was proven that there was no rust anywhere in the fuel system that would be enough to bring into question the validity of the first dealer's warranty flag. Sorry guys but I'm not ready to jump ship over one documented failure. If I had bought a parachute instead of a truck my concern level may be a little higher over one failure.
Shepherd Lincoln took one look at the truck, the fuel samples and the parts in question and immediately said that there first reaction was not water damage. They did withhold final opinion until their diesel tech with 33 years experience had a chance to do his job. After two days of pinpoint diagnosis, their position was HPFP pump failure not related to fuel quality or water. They had serviced the truck since new. They had drained the fuel separator multiple times. Each service record shows no water found in the fuel separator.
Then the political positioning began. Ford refused to send a FSE out for over a week. Not until my BIL, a Ford engineer and Plant Manager, got involved and made some contacts within the FSE department did a FSE appear. After his visit, he told the service manger he was not the enemy and he would have to see where he could go with this issue. In the end, internal politics and dealership CYA won out.
I am not the type to walk away from my responsibilities in situations like this. If I thought for an instant that there was a modicum of responsibility assignable to me in this fiasco, I would buck up and bear the burden. However, this is not the case. Those that know me realize the truth in that statement. Those that distrust my statements, I can only say that you do not know me. Even the high level Ford person who escalated the case agreed that I was in no way responsible for the breakdown. I have an email stating that fact. The other members who helped here have seen this email.
I hope this clarification helps others here understand the reality of the situation.
Regards
Ford Trucks for Ford Truck Enthusiasts
Sorry guys but I'm not ready to jump ship over one documented failure. If I had bought a parachute instead of a truck my concern level may be a little higher over one failure.
You may not be ready to jump ship, but you might put your life preserver on. The facts about the CP4.2 pump, that VW has had numerous failures, that Bosch recommends fuel with much higher lubricity than is commonly available in the U.S., those facts cast a significant shadow of doubt about the future reliability and cost of ownership, to say nothing for the behavior of FoMoCo.
Many of us can sneeze or fart $600 to keep a good truck rolling.
What we can't tolerate is a slap in the face from a corrupt and incompetent company. I've heard enough to decide.
If anyone employed by Ford is reading this, visualize a smiley with his middle finger extended.
http://forums.tdiclub.com/showpost.p...&postcount=835
Same thing for pumps in Canada, failures on 460 micron canadian spec fuel.
As this issue makes headlines, based on your post yesterday, there will be many, many, more users chiming in that have no pre knowledge of you, your truck, or the history. Simply armchair quarterbacks that have an opinion but little to no value to add. Or GM/Dodge sales people that are salivating.
In case your wondering NinerBikes I was not referring to you.
How many people have you heard stating that they don't find any water when they drain their water separator.........95%-98%? I wonder how it is possible that as many times as the fuel is transferred from one tank to another sometimes during rain events that no water is making into the water separator? I know for a fact that storage tanks at terminals have water drained off of them daily due to condensation buildup in the large tanks. I won't continue to beat a dead horse about emulsified water.
Rick, thanks for the response. My mind develops questions and I ask them to satisfy it, not necessarily to discredit you. No matter the circumstances, it appears that you are the victim. Now that you have a completely new fuel system, what are the possibilities of future warranty on those components? If there is no possible warranty on the fuel system, I would think seriously about aftermarket water separation and lubricity additive. Of course those will be necessary items on a Duramax that uses the same pump as well.
Many of us can sneeze or fart $600 to keep a good truck rolling.
What we can't tolerate is a slap in the face from a corrupt and incompetent company. I've heard enough to decide.
If anyone employed by Ford is reading this, visualize a smiley with his middle finger extended.
Peace and a great weekend to all.










