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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1051 (Engine Cooling System) >> Water Pump >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain coolant.
    CAUTION: Perform when the engine is cold.
  2. Remove coolant reservoir. Refer to "REMOVAL AND INSTALLATION ".
  3. Remove IPDM E/R mounting bolts and position aside.
  4. Remove right-hand wheel and tire assembly using power tool.
  5. Remove splash shield.
  6. Remove drive belts. Refer to "REMOVAL ".
  7. Remove idler pulley, then power steering adjusting bar.
  8. Support engine at lower oil pan with a transmission jack and remove front engine insulator and bracket.

    Refer to REMOVAL AND INSTALLATION .

  9. Remove water drain plug on water pump side of cylinder block.
    Fig 1: Removing Water Drain Plug On Water Pump Side Of Cylinder Block
    G00775136Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove chain tensioner cover and water pump cover.
  11. Remove the chain tensioner assembly.
    1. Pull the lever down and release the plunger stopper tab.
    2. Insert the stopper pin into the tensioner body hole to hold the lever and keep the stopper tab released.
      NOTE: An Allen wrench [(2.5 mm (0.098 in)] is used for a stopper pin as an example.
      Fig 2: Removing Chain Tensioner Assembly
      G00775137Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Insert the plunger into the tensioner body by pressing the timing chain slack guide.
    4. Keep the slack guide pressed and hold the plunger in by pushing the stopper pin deeper through the lever and into the tensioner body hole.
    5. Make a gap between water pump gear and timing chain by turning the crankshaft pulley approximately 20° clockwise.
      Fig 3: Identifying Crank Pulley
      G00775138Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove chain tensioner.
    Fig 4: Removing Chain Tensioner
    G00775139Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Be careful not to drop chain tensioner bolts inside front timing chain case.
  13. Remove the three water pump mounting bolts. Make a maximum gap between water pump gear and timing chain by turning crankshaft pulley counterclockwise until timing chain loosens on water pump sprocket.
    Fig 5: Removing Three Water Pump Mounting Bolts
    G00775140Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Screw M8 bolts [pitch: 1.25 mm (0.49 in) length: approx. 50 mm (1.97 in)] into water pump's upper and lower mounting bolt holes until they reach the timing chain case. Then, alternately tighten each bolt for a half turn, and pull out the water pump.
    • Pull straight out while preventing vane from contacting socket in installation area.
    • Remove water pump without causing sprocket to contact timing chain.
      Fig 6: Locating Water Pump
      G00775141Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove M8 bolts and O-rings from water pump.
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