Low Pressure Oil Pump Damage - Ford Powerstroke Diesel Forum
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post #1 of 29 Old 01-23-2020, 07:49 AM Thread Starter
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Low Pressure Oil Pump Damage

I'm sure this is old news to most but I was hoping for a little input on my latest problem. Truck is 2006 F250 with 120K miles.

I bought this from California to get a rust free truck instead of the crap here in Eastern Pennsylvania. I drove it maybe 10 miles back in November and then moved it into my shop. Truck ran great. No unusual noises. I decided to go over everything this winter so long story short I decided to replace the OEM water pump. The pump housing showed significant erosion so I then decided to replace the front cover. The LPOP shows a single indentation on the rotors and scoring on the housing walls on both sides. Pictures below

Low Pressure Oil Pump Damage-dcp_5897-1-.jpg

The indentation looks a lot like a lifter needle bearing to me. I would really appreciate any input as to conclusions and course of action. Also, if anyone could give me a recommendation for a shop in eastern PA, that would be a great help as well.
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post #2 of 29 Old 01-23-2020, 07:56 AM
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We've had 3 6.0's here locally with lifter bearings jammed up in the LPOP
All of them were high mileage (over 250k) with minimal maintenance

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post #3 of 29 Old 01-23-2020, 08:03 AM
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Hope to drum up more reaction for you, but IMO when these low pressure oil generators are changed, there's always a risk that that lifter that went bad will spit out another bearing and take the oil pump out again. Even if it doesn't, something in that engine lost a piece of metal and can fail soon.

I've got a list of things I want to do when the engine comes out, and right now its not long enough for it to actually remove the engine, but when I do changing lifters at the least would be what I'd do inside the engine. Right now, the truck is running great (thank god my other two vehicles both decided to lose their coolant) so a drop or two of oil a day is not enough for me to pull it. If I could get the engine out, I'd seriously consider an Ashville engine instead of attempting all that work.

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post #4 of 29 Old 01-23-2020, 09:29 AM
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Looking at your first picture, I am surprised it had any oil pressure at all
Those two flat surfaces need to be in good shape, they are what separates the pressure from the suction
the gouge shows that something went thru there several times -- why?, well at this point who knows

I would want to see what is trapped in the oil suction screen and on the bottom of the pan
and the condition of the bearings

Could be something easily fixed or more complicated -- but without looking, it is just a guess
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post #5 of 29 Old 01-23-2020, 09:47 AM Thread Starter
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If it makes sense I am planning on looking in the oil pan since the truck is apart and up in the air.

I agree on the oil pressure, those grooves look pretty bad. When I drove it, pressure showed ok. Maybe since I never drove far the oil stayed cold enough to keep the pressure up. If it got hot, the pressure may have dropped as the oil thinned out.

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post #6 of 29 Old 01-23-2020, 10:35 AM
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The gauge on the dash only can read zero or half way -- not a real pressure gauge
the sender is tripped at about 7psi
so basically a feel good indicator <insert expletive here>

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post #7 of 29 Old 01-23-2020, 11:10 AM Thread Starter
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Anybody know the approximate diameter of the lifter needle bearings?
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post #8 of 29 Old 01-23-2020, 12:43 PM
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There has to be some serious axle or roller damage for them to eject. Somehow I've ended up with almost three motors worth in my home garage.
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post #9 of 29 Old 01-23-2020, 12:53 PM Thread Starter
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Thanks for that, especially the English version.
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post #10 of 29 Old 01-23-2020, 04:34 PM Thread Starter
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I got the oil pan off and this is what I found at the bottom.

Low Pressure Oil Pump Damage-dcp_5910-1-.jpg

There are a few bits of gasket material. 1 O ring. A piece of a small black wire tie. 1 flake of aluminum. One curled piece of aluminum. Few other bits. Overall it was pretty clean. No sludge on the bottom. So now I am not sure how to proceed. Re assemble with new front cover and hope for the best or tear down motor and start over. I would appreciate any advice.
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