Davco 382 / fuel filter not filing up

Discussion in 'Ask An Owner Operator' started by henboy1, Jun 20, 2020.

  1. jamespmack

    jamespmack Road Train Member

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    Read davco instructions, then come back with your "opinion".
     
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  3. henboy1

    henboy1 Medium Load Member

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    Ok
     
  4. mover man

    mover man Road Train Member

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    Be happy, It's doing what it is supposed to do. You been getting good fuel lately. As 5h3 filter gets dirty, it will fill up.
    If you want to test it, with the engine SHUT OFF, mark the spot where it is with a sharpie. Then fill it up, start the truck and drive next 5ime you stop check it again. It should be right back down the the sharpie mark.
     
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  5. PE_T

    PE_T Road Train Member

    When you change the fuel filters and turn on the engine, you’re supposed to purge the air from the system. You don’t want to turn it on for a bit and then turn it back off. One way to purge the system is to drive the truck. So in other words, change the fuel filters before you plan to roll.

    The long way to purge the system is to idle the engine until it reaches the normal operating temperature (140 F). Then you increase the engine speed to 1800 RPM for three minutes. These are the instructions for the DD15. So if you have a different engine, it may be different.

    Yes, it’s normal for the fuel level to be a little above the collar of the filter clear cover. By the way, the clear cover should have a line printed on it indicating that once it reaches that line, it’s time to replace the filter.
     
  6. jamespmack

    jamespmack Road Train Member

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    Knowing what your talking about is half the battle.
     
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  7. Elroythekid

    Elroythekid Road Train Member

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    I find if I use fleetguard or Baldwin it NEVER climbs very far up. If I use Donaldson, it does. I'm told Donaldson is a finer micron, so it filters out more impurities so it needs replacing more frequently.
    Donaldson I need to replace every 12-15k miles. Fleetguard can go 25k Miles or more.
     
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  8. jamespmack

    jamespmack Road Train Member

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    They have part numbers for any micron you want. I tell you standard on a 12.7l 2000 and earlier detroit is 10 micron. Wix 3651, the wix 3651xe is a 5 micron. The 5 micron really helps protecting injectors. But you will loose 20-40 hp on a chassis dyno. You have to choose what you want. I would run a 5 on a fleet. But 10 on my own truck. You will change a 5 micron more often normally. Just go to your fuel filter manufacture and look up the numbers. However I would not go above manufactures warranty. You might have a 30 micron, which is big. But acting as a primary filter with a secondary on the engine. Not every truck or brand are built, or ordered the same.
     
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  9. Elroythekid

    Elroythekid Road Train Member

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    My truck only has 1 fuel filter and 2 oil filters. I'll have to look up mine. It's a P550467.
    Says 7 micron?
     
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  10. jamespmack

    jamespmack Road Train Member

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    Just always double check your numbers. Most shops or parts guys will give you one that fits.
     
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