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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pump Assemble

Oil Pump Assemble

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Important:  Prior to assembling the oil pump, coat all wear or internal surfaces with clean engine oil.

  1. Install the driven gear into the pump housing.

    Install the driven gear with the orientation mark facing the pump cover.

    Fig 1: Installing Driven Gear
    G02078904Courtesy of GENERAL MOTORS CORP.
  2. Install the drive gear into the pump housing.
    Fig 2: Installing Drive Gear
    G02078905Courtesy of GENERAL MOTORS CORP.
  3. Install the oil pump cover.
    Fig 3: Installing Oil Pump Cover
    G02078906Courtesy of GENERAL MOTORS CORP.
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Install the pump cover bolts.

    Tighten 

    Tighten the oil pump cover bolts to 12 N.m (106 lb in).

    Fig 4: Installing Pump Cover Bolts
    G02078907Courtesy of GENERAL MOTORS CORP.
  5. Install the regulator valve.
    Fig 5: Installing Regulator Valve
    G02078908Courtesy of GENERAL MOTORS CORP.
  6. Install a NEW regulator valve spring.
    Fig 6: Installing Regulator Valve Spring
    G02078909Courtesy of GENERAL MOTORS CORP.
  7. Install the pressure relief valve plug.

    Tighten 

    Tighten the pressure relief valve plug to 12 N.m (106 lb in).

  8. Inspect the oil pump for smoothness of operation by rotating the drive gear.
    Fig 7: Installing Pressure Relief Valve Plug
    G02078910Courtesy of GENERAL MOTORS CORP.
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