Low pressure oil pump - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 11-10-2019, 07:08 AM Thread Starter
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Low pressure oil pump

I pulled my low pressure oil pump gears, and they were destroyed. Worse than anything I have seen online. Surprised it would even start before, should I pull the oil cooler and check the screen under it? Or would the oil filter have caught anything trying to go in there? I have to replace the front cover along with the gears.
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post #2 of 16 Old 11-10-2019, 09:00 AM
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you check your lifters ?
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post #3 of 16 Old 11-11-2019, 08:34 AM Thread Starter
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I pulled the oil cooler to check the screen under it. If I had lifter failure, would there be metal shavings in the screen under the oil cooler?
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post #4 of 16 Old 11-11-2019, 09:20 AM
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post #5 of 16 Old 11-11-2019, 10:35 AM
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Can you post a picture of the LPOP gears, the LPOP cover, and the front cover.

Sometimes you can tell what went through it by the indentations on those components.

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post #6 of 16 Old 11-11-2019, 01:10 PM Thread Starter
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see if this works
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post #7 of 16 Old 11-11-2019, 01:12 PM Thread Starter
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post #8 of 16 Old 11-11-2019, 01:20 PM
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Maybe I missed it, but why did you pull the pump in the 1st place? Were you having issues?

Are you the original owner? If not, maybe the damage was done prior to you owning the truck...? If you are the original owner, i wouldn't rest easy until I figured it out. That pump is dinged up pretty bad...

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post #9 of 16 Old 11-11-2019, 01:48 PM Thread Starter
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No I am prob the 4th owner, I had a long crank cold prob about 5 - 7 secs. I started with a low pressure oil test, jumping the starter at the battery with the wire and watching the oil bowl fill. It took prob 10 seconds at least. I did an air test and it sounded like I had a nipple cup/ injector leaking. The truck would still start at this point. I tore it down and replaced the nipple cup seals and injector orings. Tried to prime the system and the icp wouldnt build. I did another low pressure oil test and it would not fill the bowl at all, not a drop. I have read that a weak pump if the oil is pushed out of it wont be able to get the system going again. Tore the low pressure oil pump out and found the damage. Today I took the oil cooler out, and the Hpop. Both were super clean. I looked at the rear lifters i could see under the Hpop and those looked fine. However the Hpop cover had a chuck of the aluminum where the oil drain tube for the turbo goes missing. Tomorrow I am going to strain the engine oil with a magnet to see if anything is in the oil. I have seen online that lifter failure symptoms are a knocking noise from the intake or exhaust as you turn the engine over, however I dont have any noise like that. The truck has been worked on quite a bit before me, with a certain level of ignorance. I found previously that one of the dummy plugs was not done when that job was performed, so both stand pipes and 1 dummy plug were upgraded. I have fixed that issue, along with many others.
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post #10 of 16 Old 11-11-2019, 02:02 PM Thread Starter
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All that being said the injectors were done right before I bought the truck about 15,000 miles ago. It has always had the long start cold. Most of the miles I have put on it were towing a 34' camper all over western united states.
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