6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
Hey guys, I just got the word from a reliable source at Ford Motor Co that they have had some serious problems with several 6.4's!!!!
He said that an employee was driving one from a dealership to another dealership and an internal high pressure fuel line BLEW UP causing the motor to hydrolock and seize up!!!!!! After further inspection they estimate the line pressure reaching over 12,000 PSI to cause this failure. He said that when it happened, the motor "ran away" and accelerated until he shut the key off. If he had not shut the key off the motor itself would have blown!!!!!! My source looked into this and found several other cases with the same problem. He said they have the Navistar tech's trying to figure out what happened but at this point they don't have a clue!!!
This does not look good Ford!!
I heard that Ford did a 300,000 + mile test with the 6.4 before its release. [img]/ubbthreads/images/graemlins/shrug.gif[/img] I guess this may be like the 6.0 where some are fine and some have problems.... It may depend what day of the week it was made etc....
The information you provided that led to the term you used: "hydrolock" does not seem plausible from what you described and the fuel pressure you stated is not beyond limits from what I have read about common rail fuel delivery. I am skeptical of this report.
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2008 F-450 Lariat Dark Stone Metallic over Pueblo Gold 4x4(manual shift transfer case, manual hubs), High capacity tow 4:88s, Off Road, Camper packages, Sirius Sat, Upfitter switches, DVD entertainment, tailgate step, traction control, Audiophile 6-disc, PTC Supplemental heat and heated seats(warm buns), rear sensors, traction control, tailgate step. Built May 8, delivered May 24
Reese Signature Series 24k fiver hitch, I installed it myself, best hitch I have found yet
Line-X bedliner, heavy duty floor mats
2003 Sunline F281SR(weekend getaways)
SeaRay 215EC http://community.webshots.com/user/C...host=community
Son has a Buddy who works for NAVISTAR in Melrose Pk, IL....in the dyno cell. These 6.4L engines have run tens of thousands of hours in the worst possible torture conditions at unbelievable HP & torque levels to try to blow them up. I expected a few teething problems like leaky hoses, things that rub & chaff....but nothing more.
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Denny
'96 F-250 Reg. Cab 4X4 5-sp POWERSTROKE
294,000 mi & NO Problems, LUK Clutch, and the Cat is buried in the back yard!
Well, I know that the motor locked up. There might be another factor that also contributed to it but all I have been informed of at this point is the fuel line exploding under pressure which caused the motor to run away by dumping fuel in it. The line was an "internal" fuel line. I have not seen the truck but I would assume it is possible for it to seize if it dumped a LOT of fuel into the cylinders at one time.
I will say that my source comes directly from Ford and I trust them. I dont enjoy reporting bad reviews but I thought this was very interesting.
You have to make your own assumptions obviously, but I will be hanging on to my 7.3.
Hopefully, its just a simple adjustment that can be fixed. However, from what I was told, its an internal fuel line problem which makes it much harder to "adjust" it. I was suprised because I have heard of the excessive R&D Ford did to ensure a successfull launch of the 6.4
If I receive any more detailed info I will pass it on.
#1 reason for suspicions of this so-called report is this statement:
"You have to make your own assumptions obviously, but I will be hanging on to my 7.3". How many times have I heard this phrase written one way or another. The 7.3 was a good engine for it's time. However, thanks to the EPA and consumers want of something more powerful, it is dead. Time to move on. Please explain how an internal fuel line ruptured and caused runaway throttle? External line letting go, allowing fuel to spray into intake, sure it is possible. Internal line lets go, crankcase fills with fuel, possibly locking the engine up, but it would take a lot of fuel to do that, and the engine would probably have alread shutdown for lack of fuel delivery to the injectors well before that large cavity filled up enough to cause the lock-up. Is it Friday, I smell something fishy.
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2008 F-450 Lariat Dark Stone Metallic over Pueblo Gold 4x4(manual shift transfer case, manual hubs), High capacity tow 4:88s, Off Road, Camper packages, Sirius Sat, Upfitter switches, DVD entertainment, tailgate step, traction control, Audiophile 6-disc, PTC Supplemental heat and heated seats(warm buns), rear sensors, traction control, tailgate step. Built May 8, delivered May 24
Reese Signature Series 24k fiver hitch, I installed it myself, best hitch I have found yet
Line-X bedliner, heavy duty floor mats
2003 Sunline F281SR(weekend getaways)
SeaRay 215EC http://community.webshots.com/user/C...host=community
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Please explain how an internal fuel line ruptured and caused runaway throttle? External line letting go, allowing fuel to spray into intake, sure it is possible. Internal line lets go, crankcase fills with fuel, possibly locking the engine up, but it would take a lot of fuel to do that, and the engine would probably have alread shutdown for lack of fuel delivery to the injectors well before that large cavity filled up enough to cause the lock-up. Is it Friday, I smell something fishy.
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Wow! Some folks are loathe to admit there could be any problems.
As far as a runaway is concerned, the mechanism is not complicated. As the crankcase fills with fuel it can be drawn through the crankcase vent via the turbo and then into the cylinder. Voila -- runaway!
Usually turning off the key doesn't stop a runaway. I suppose that stopping the pumping of fuel into the crankcase would eventually stop the runaway, but it doesn't seem like it would be instantaneous. If it worked, they got lucky.
Duncan
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The 1997 F250HD Crewcab: Picture
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The 2003 F250 Crewcab 6.0L: Web page
The 6.0L Bible: Web page
The 6.4L Bible: Web page
Well, like I already said, I'm passing on what I was told directly from Ford Motor Co. I also already said that there are probably some other factors contributing to the problem. However this is all irrelevant. The fact is, there is a major problem that caused the engine to run away and a high pressure fuel line to burst. I can't offer any further info as I have not seen the offending engine myself. Maybe this is an isolated incident but I doubt it since there were 4 other trucks with the same symptoms reported in out area.
BTW if you smell something fishy, you might want to check under your arm... [img]/ubbthreads/images/graemlins/blush.gif[/img]
BTW if you smell something fishy, you might want to check under your arm... [img]/ubbthreads/images/graemlins/blush.gif[/img].
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That's funny! [img]/ubbthreads/images/graemlins/laugh.gif[/img] I'm glad you all are keeping this civil. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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Black/05/F350/XLT/CC/LWB/FX4/SRW/3.73/6.0L PSD/ TorqShift/Updated TBC/Upfitter Switches/SEIC Mod/Diesel Site Coolant Filter/Fumoto Valve/ITEC HFCM Drain Plug/Bilstein Shocks/BFG A/T 28565R18/Built September of 2004
Things are bound to happen good and bad when new products get introduced to the public. This may or may not be true. But my only quetion is how long before this thread gets a lock put on it. It seems like there is an endless supply of them lately. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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2006 F-350 King Ranch 6.0L V-8 Diesel - 4X4
4.5" Donahoe Racing Lift Kit w/ 35" Dick Cepek
Banks Power Monster Exhaust
Banks Power Diesel Tuner
Banks Power Speed Loader and power PDA tuner
Two 7" Warn Lights
Front end replacement bumper w/ grille guard
9.5ti Thermometric Warn Winch
Two 5' Black CB Whips installed inbetween cab/bed
Uniden CB Radio (Bearcat Style)
JL Audio 13W7
JL Audio 1000/1 Amp
Stinger 40 Farad Cap.
the runaway problem that has been discussed here and many times before was due to a short run of motors that had the injectors tightened to much that it resulted in the injector cracking and causing more fuel to enter the motor, heads, or something along those lines.
I know, I was just posting some info I received and was met with a lot of resistance!! haha, all new engines having problems when they're first introduced. The 6.9 the 7.3 and 6.0 all had problems at some point. Ford is under more of a microscope now because the 6.0 had more problems than its predecessors. I know, there are some 6.0's with no problems as well. Its funny that at the very mention of a 6.4 having a fairly large fuel problem, one gets slammed right off the bat.
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