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Thread: Oil pump installation instructions

  1. #1
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    Oil pump installation instructions

    I'm praying that someone might know or know where I can get step by step install directions on the installation of a new oil pump on a 2004 Chevy silverado 4.8L 2wd ? I'm at my whits end I can't get oil flow to the oil filter, a friend suggested I pack the pump with vasoline ? I don't even get flow to the pump from the suction tube in the oil pan?????

  2. #2
    Senior Moderator chevychase's Avatar
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    Found this no instructions...how to prime your set up.

    2005 Chevrolet Silverado Problem Chevy Oil Pressure

    Gitter done have fun. Running on empty...running blind...running behind.....

  3. #3
    Senior Moderator chevychase's Avatar
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    Also found info that said 4.8 were bad for bad cam bearings ..at your mileage hope not try the pump prime should work.

    Gitter done have fun. Running on empty...running blind...running behind.....

  4. #4
    Senior Member MikeG's Avatar
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    4.8L, 5.3L & 6.0L Engines

    Remove or disconnect the following:
    • Engine front cover
    • Oil pan
    • Oil pump screen bolt and nuts
    • Oil pump screen with O-ring seal.

    • O-ring seal from the pump screen. Discard the O-ring seal.
    • Remaining crankshaft oil deflector nuts.
    • Crankshaft oil deflector
    • Oil pump bolts
    • NOTE
      Do not allow dirt or debris to enter the oil pump assembly, cap ends as necessary.

      • Oil pump
      NOTE
      The internal parts of the oil pump assembly are not serviced separately (excluding the spring). If the oil pump components are worn or damaged, replace the oil pump as an assembly. Do not attempt to repair the wire mesh portion of the pump and screen assembly.

      To install:
      NOTE
      Inspect the oil pump and engine block oil gallery passages. These surfaces must be clear and free of debris or restrictions.

      1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.
      2. Install or connect the following:
        • Oil pump bolts. Tighten the oil pump bolts to 18 ft. lbs. (25 Nm).
        • Crankshaft oil deflector
        NOTE
        Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
        • NEW O-ring seal onto the oil pump screen
        NOTE
        Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump.
      3. Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.
      4. Install or connect the following:
        • Oil pump screen
        • Oil pump screen bolt and the deflector nuts. Tighten the bolt to 106 inch lbs. (12 Nm) and the nuts to 18 ft. lbs. (25 Nm).
        • Oil pan
        • Engine front cover
          Exploded view of the oil pump mounting—4.8L, 5.3L and 6.0L engines

          To install:
          NOTE
          Inspect the oil pump and engine block oil gallery passages. These surfaces must be clear and free of debris or restrictions.

          1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.
          2. Install or connect the following:
            • Oil pump bolts. Tighten the oil pump bolts to 18 ft. lbs. (25 Nm).
            • Crankshaft oil deflector
            NOTE
            Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
            • NEW O-ring seal onto the oil pump screen

              • NEW O-ring seal onto the oil pump screen
              NOTE
              Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump.

            • Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.
            • Install or connect the following:
              • Oil pump screen
              • Oil pump screen bolt and the deflector nuts. Tighten the bolt to 106 inch lbs. (12 Nm) and the nuts to 18 ft. lbs. (25 Nm).
              • Oil pan
              • Engine front cover
          Click to Enlarge


    '96 K1500 Ext. Cab Z71, 5.7L, Spectre Air Intake, 4L60E, 199K+, 13/18mpg
    My other car is Aircooled
    '69 Patina (0\_!_/0)

  5. #5
    Senior Moderator chevychase's Avatar
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    Man hard to find took me a half hour...i have one with a few pics but will not post because i know Mikeg had a time finding that one.
    Seems would be plenty of info on that ..sure found for others though.

    Gitter done have fun. Running on empty...running blind...running behind.....

  6. #6
    Senior Moderator chevychase's Avatar
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    Oh sure going to mark the hard to find sob lol

    Gitter done have fun. Running on empty...running blind...running behind.....

  7. #7
    Senior Member MikeG's Avatar
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    Quote Originally Posted by chevychase View Post
    Man hard to find took me a half hour...i have one with a few pics but will not post because i know Mikeg had a time finding that one.
    Seems would be plenty of info on that ..sure found for others though.
    Not too hard to find, I used ChiltonLibrary. Only issue is the diagrams wouldn't post......oh well. If you have something with pics post it; might give Mike n a little more help/ insight.
    '96 K1500 Ext. Cab Z71, 5.7L, Spectre Air Intake, 4L60E, 199K+, 13/18mpg
    My other car is Aircooled
    '69 Patina (0\_!_/0)

  8. #8
    Senior Moderator chevychase's Avatar
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    Gitter done have fun. Running on empty...running blind...running behind.....

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