Question about 2008 Ford F 450 Super Duty

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Ford f450 6.4-high pressure fuel pump failure

I would like your opinion on the following:I have an '08 Ford F450 6.4 ltr with less than 35,000,miles. Ford mechanics tell me that the high pressure fuel pump failed, causing diesel fuel to leak into the crank case. Normal level in oil tank is 3 gal, when they emptied it there was +5 gal. Ford maintains no bearing damage. Do you think diesel in the oil would cause viscosity breakdown and damage to the bearings? I need a foot to stand on in my fight with Ford.

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  • KHinson Apr 07, 2009

    I have an 2008 F450 6.4L with 19K miles.  During routine oil change, dealer found 5 extra quarts of fluid in crankcase when draining.  Said it was diesel.  Dealer says diesel is from regeneration cycle not completing each time.  Evidently I have to drive the truck until the "Cleaning Exhaust Filter" notification completes, no matter that it takes longer than my trips to complete.  If I am unable to drive until regeneration is complete, the extra diesel will continue to build up again.  Ford says its "Normal".  I do have the ESP but am worried about failure while towing at altitude and under heavy load. Can't believe Ford would build an engine that has to be driven a certain length of time or it mixes the fuel and the oil--just does not make any sense.  Please advise.

  • gerry bissi May 11, 2010

    As long as you did not lose hydrostatic lubrication, you should be ok. However, for piece of mind, I would ask for an ESP Plan that covers your engine with a deductible up to 100K. If it's going to fail a bearing, it will long before 100K.

  • Anonymous Mar 12, 2014

    mechanic pump its working fuelfilter full



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I would like to clarify, and somewhat solve this issue. First of all the dealer is right about the regen. If the truck is going into regen and did not finish, then it will do the regen again and again and this excessive regen will cause fuel in the oil. Unfortunatly Ford did not add a parked Regen switch (too complicated for some users) so you will have to drive untill the regen light goes out. I know it's inconventant but that's part of the hassel you need to go through because Al Gore invented the internet and then warned us all about global warming. Anyway there are some other causes including porous cylander heads (this will show up in low mileage vehicles only), HP Fuel pumps, fuel sensors, injectors, lines, etc. etc. Since you both seem to have low mileage ask the Ford Dealer about the porous cyl heads and watch his face go blank. Is smoke comes out of his ears make sure his DPF isn't clogged and ask him if he needs to Regen. then tell him he has to run 30 mintues weither he likes it or not or he will get fuel in his oil. By the way you may also need to ask about an updated ECM reflash which could help this issue. Have a nice day.

Posted on Apr 22, 2009

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Well it might be a tedious process. i would suggest u to get it done by a dealer.

Posted on Jan 07, 2011


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I hope this information work for you..

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You are Under Warranty for this Problem, with the FORD DEALER.

I recomend Contact the Nearest Ford Dealer .

OK. This is not a solution of your problem, But I hope help on your questrion.

Thank you for use fixya..

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