Does anyone here have experience with the 6.4 L injectors? My truck has a failed HPFP and i have to either replace my entire fuel system or i have to figure out how to clean and reseal everything.
The injectors i would need to find a source for all the seals/orings. I just want to take them apart and clean clean clean them get all the glitter out of them, reseal them and put them back together, will save a ton of $.
The entire fuel system parts cost about $8k. I cant just buy all that stuff and replace everything....thats what ford does just so they can cover their butt, it usually costs around $10,000....thats insane.
I don’t know for sure what exactly caused the pump to fail. I think that is may be water related. I never got "water in fuel" light. But I may not have been draining the HFCM religiously, but we do ford fuel filters every 10k miles. And I think another attributing factor may be the use of fuel conditioners. I always use power service fuel additive when I am in town, but whenever I go across country I may not always get fuel additive in. I think the fuel additive is extremely important in preventing this? Because it helps remove water from fuel condensation when warm fuel returns to the take. Also adds lubricity, since the HPFP is lubricated by fuel. And filling the tank at the end of every day will help with condensation, which I don’t always get to do.
I took apart the HPFP and found rust splotching all over most of the surfaces. The part that actually failed was the vane portion of the pump. See pictures.<O</O
You can see the heat had locked in those 5 little rectangle pieces and then the aluminum and steel starting galling on each other. I have taken a lot of the fuel system apart and there is glitter and flakes…everywhere.<O></O>
I was looking at the injector seals, looks like there is only really 3 seals that i would need. i could keep the pizeo all together since fuel doesn’t go inside of that. Then i could disassemble the rest of the injector and clean it, along with the high pressure fuel rail.<O></O>
Basically we had to do a cab off, entire fuel system tear down. We were able to clean certain parts like the fuel tank, a few lines, but not much. Everything else got replaced with brand new ford parts. They seem to be building the 6.4 injectors so they cannot be taken apart without extremely specialized tools and I would assume that only the ford remanufactures can rebuild them. we replaced all the injectors, hpfp, all the high pressure lines, fuel cooler, hfcm and pump, were able to clean the fuel rails, and we used some old high pressure fuel lines to flush out the return fuel passages in the heads, and im glad we did that because there was a lot of metal debris in there. We also did the front cover update, because ours was cavitated so badly. Our pump failed due to water. Water created rust, and started the galling process. I believe we got water because I was getting fuel out of town, which can contain up to 10% bio diesel, which created the “fuel cheese” in the hfcm, and blocked the wif sensor, and the water got in the fuel and through the pump and then It catastrophic failure from there. This job and the front cover cost us $13k to fix. Going forward, I have learned the water in fuel is a huge deal…because even if you do everything right, you can still get water in your fuel because they use water to remove the sulfer from the fuel, so x amount of water comes from the fuel manufacture, so proper tank maintenance is extremely important. Control your fuel quality; always use a fuel additive, like power service because you get the water dispersant, lubricity additive, and cetane boost. These trace water amounts from the fuel provider could be enough to get by the wif sensor and over time through the hpfp and eventually start to rust to pump. This is why a fuel additive is important to help disperse the water in fuel, it basically surrounds the water molecules so that they don’t touch any of the metal surfaces. As far as the front cover, I will be replacing coolant every year, no matter what. The amount of work this coolant has to do is insane, and this will be even more important on the 6.7 because that cooling system does even more work. The 6.7 also has a very similar hpfp which will be susceptible to the same problems.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
I don't think you want a fuel additive that will disperse the water, or it will go right through the water blocking membrane on the fuel filter.
Maybe thats the reason this happened, wrong fuel additive....
As expensive as that is I wonder if a HPFP replacement is a good preemptive maintenance at say 100K. Wonder what that would cost and/or if it would help at all? Heck a new engine isn't much more than that but not sure what all they come with up top.