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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Engine Cooling System) >> Removal And Installation >> Water Pump >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery terminal. Refer to Battery Disconnect .
  2. Remove front air duct. Refer to Removal and Installation .
  3. Remove cowl top extension. Refer to Removal and Installation .
  4. Remove front under cover. Refer to Removal and Installation .
  5. Drain coolant from the radiator. Refer to Changing Engine Coolant .
    CAUTION: Perform when the engine is cold.
  6. Disconnect coolant reservoir hose and remove coolant reservoir tank. Refer to Exploded View .
  7. Drain the power steering fluid reservoir. Refer to Draining and Refilling .
  8. Remove the power steering oil pump. Refer to Removal and Installation .
  9. Support the engine (1) and transaxle (2) using suitable jack (A).
    G08432175Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Position a suitable jack under the engine and transaxle assembly as shown.
    • Do not damage the front exhaust tube or transaxle oil pan with the jack.
  10. Remove The RH engine insulator and bracket. Refer to Removal and Installation .
  11. Remove the drive belt auto-tensioner assembly. Refer to Removal and Installation of Drive Belt Auto-tensioner .
  12. Set No. 1 cylinder at TDC on its compression stroke.
    • Align pointer with TDC mark on crankshaft pulley.
  13. Disconnect valve timing control harness connectors and remove valve timing control cover (bank 1). Refer to Valve Timing Control Cover (bank 1) .
  14. Remove water pump cover. Refer to Exploded View .
  15. Remove the timing chain tensioner (primary) as follows:
    1. Pull the lever (C) down to release the plunger stopper tab (B).
      GNSAWBIA0903Z-903Courtesy of NISSAN NORTH AMERICA, INC.
    2. Insert the stopper pin (A) into the tensioner body hole to hold the lever (C) and keep the plunger stopper tab (B) released.
      NOTE: An allen wrench [(1.2 mm (0.047 in)] is used for a stopper pin (A) as an example.
    3. Compress the plunger (D) into the tensioner body (1) by pressing the slack guide (2).
    4. Keep the slack guide (2) pressed and lock the plunger (D) in by pushing the stopper pin (A) through the lever (C) and into the chain tensioner body hole.
    5. Remove timing chain tensioner bolts and then remove the timing chain tensioner.
      CAUTION: Be careful not to drop timing chain tensioner bolts inside timing chain case.
  16. Remove the three water pump bolts (A). Make a gap between water pump sprocket (1) and timing chain by carefully turning crankshaft pulley (2) counterclockwise until timing chain loosens on water pump sprocket (1).
    GNSAWBIA0904Z-904Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Be careful not to drop water pump bolts inside the timing chain case.
  17. Screw M8 bolts [pitch: 1.25 mm (0.49 in) length: approx. 50 mm (1.97in)] into water pumps upper and lower bolt holes until they reach the timing chain case.
    G04073560Courtesy of NISSAN NORTH AMERICA, INC.
  18. Hold the timing chain to the side using a suitable tool and alternately tighten the M8 bolts for a half turn until the water pump can be removed.
    GNSAWBIA2670Z-670Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Place a suitable shop cloth below the water pump housing to prevent any engine coolant from dripping into the timing chain case.
    • Remove water pump without causing sprocket to contact timing chain. It may be necessary to adjust the timing chain until it loosens enough to remove the water pump.
    • Pull water pump straight out while preventing vane from contacting the engine block and timing chain case.
  19. Remove M8 bolts and O-rings from water pump.
    CAUTION: Do not reuse O-rings.
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