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Water Pump Removal / Installation - 4.0L

  1. Disconnect negative battery cable. See BATTERY DISCONNECT .
  2. Drain engine coolant. See ENGINE COOLANT REPLACEMENT - 4.0L  .
  3. Remove cooling fan blade and clutch. See COOLING FAN AND CLUTCH REMOVAL / INSTALLATION - 4.0L  .
  4. Remove the bolts and position the fan shroud out of the way.
  5. Remove the drive belt. See DRIVE BELT REMOVAL / INSTALLATION - 4.0L .
  6. Remove the belt idler pulley.
    Fig 1: Removing/Installing Belt Idler Pulley With Torque Specifications
    G04307903Courtesy of MAZDA MOTORS CORP.
  7. Slide the water bypass hose clamp back.
    Fig 2: Sliding Water Bypass Hose Clamp Back
    G04307904Courtesy of MAZDA MOTORS CORP.
  8. Disconnect the heater hose at the water pump.
    1. Release the clamp.
    2. Remove the hose.
    Fig 3: Disconnecting Heater Hose Water Pump
    G04307905Courtesy of MAZDA MOTORS CORP.
  9. Disconnect the lower radiator hose at the water pump.
    1. Release the clamp.
    2. Remove the hose.
    Fig 4: Disconnecting Lower Radiator Hose At Water Pump
    G04307906Courtesy of MAZDA MOTORS CORP.
  10. Remove the water pump pulley.
    Fig 5: Removing/Installing Water Pump Pulley With Torque Specifications
    G04307907Courtesy of MAZDA MOTORS CORP.
  11. Remove the water pump.
    Fig 6: Removing/Installing Water Pump With Torque Specifications
    G04307908Courtesy of MAZDA MOTORS CORP.
  12. Clean all the sealing surfaces.
    CAUTION:
    • Use care when scraping the water pump-to-engine block mating surfaces. Gouges in the aluminum could form leak paths.
  13. To install, reverse the removal procedure.
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