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JOHN aka Eauto
JOHN aka Eauto, The Car Guy
Category: Nissan
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Experience:  ase tech over 15 years in the field uaw union member
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Change water pump on 2000 nissan maxima

Customer Question

change water pump on 2000 nissan maxima
Submitted: 7 years ago.
Category: Nissan
Expert:  JOHN aka Eauto replied 7 years ago.
Service and Repair
Notes



REMOVAL

CAUTION:

  • When removing water pump assembly, be careful not to get coolant on drive belt.
  • Water pump cannot be disassembled and should be replaced as a unit.
  • After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester.

  1. Drain coolant from drain plugs on radiator and both sides of cylinder block.
  2. Remove right side engine mounting, mounting bracket and nuts.
  3. Remove drive belts and idler pulley bracket.
  4. Remove water pump drain plug.
  5. Remove chain tensioner cover and water pump cover.

  1. Pushing timing chain tensioner sleeve, apply a stopper pin so it does not return. Then remove the chain tensioner assembly.

  1. Remove the 3 water pump fixing bolts. Secure a gap between water pump gear and timing chain, by fuming crankshaft pulley 20° backwards.

  1. Put M8 bolts to two M8-threaded holes out of 3 water pump fixing bolt holes.

  1. Tighten Me bolts by fuming half turn alternately until they reach timing chain rear case.
    • In order to prevent damages to water pump or timing chain rear case, do not tighten one bolt continuously. Always turn each bolt half turn each time.
  1. Lift up water pump and remove it.
    • When lifting up water pump, do not allow water pump gear to hit timing chain.

INSPECTION

  1. Check for badly rusted or corroded body assembly.
  2. Check for rough operation due to excessive end play.

INSTALLATION

  1. Apply engine oil and coolant to O-rings as shown in the figure.

  1. Install water pump.
    • Do not allow cylinder block to nip O-rings when installing water pump.

  1. Before installing, remove all traces of liquid gasket from mating surface of water pump cover and chain tensioner cover using a scraper. Also remove traces of liquid gasket from mating surface of front cover.

  1. Apply a continuous bead of liquid gasket to mating surface of chain tensioner cover and water pump cover.

  1. Return the crankshaft pulley to its original position by turning it 20° forward.

  1. Install timing chain tensioner, then remove the stopper pin.
    • When installing the timing chain tensioner, engine oil should be applied to the oil hole and tensioner.
    • After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to purge air from the high-pressure chamber of the chain tensioners. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.
  1. Install drain plug on cylinder block.
  2. Reinstall any parts removed in reverse order of removal.

 

Customer: replied 7 years ago.
the m8 bolts are to pull water pump out
Expert:  JOHN aka Eauto replied 7 years ago.
yes
JOHN aka Eauto and 2 other Nissan Specialists are ready to help you
Customer: replied 7 years ago.
ok thanks
Customer: replied 7 years ago.
is it possible to resend answer to my question cause i cannot see pics thank you
Expert:  JOHN aka Eauto replied 7 years ago.
ok
Service and Repair
Notes



REMOVAL

CAUTION:

  • When removing water pump assembly, be careful not to get coolant on drive belt.
  • Water pump cannot be disassembled and should be replaced as a unit.
  • After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester.

  1. Drain coolant from drain plugs on radiator and both sides of cylinder block.
  2. Remove right side engine mounting, mounting bracket and nuts.
  3. Remove drive belts and idler pulley bracket.
  4. Remove water pump drain plug.
  5. Remove chain tensioner cover and water pump cover.

  1. Pushing timing chain tensioner sleeve, apply a stopper pin so it does not return. Then remove the chain tensioner assembly.

  1. Remove the 3 water pump fixing bolts. Secure a gap between water pump gear and timing chain, by fuming crankshaft pulley 20° backwards.

  1. Put M8 bolts to two M8-threaded holes out of 3 water pump fixing bolt holes.

  1. Tighten Me bolts by fuming half turn alternately until they reach timing chain rear case.
    • In order to prevent damages to water pump or timing chain rear case, do not tighten one bolt continuously. Always turn each bolt half turn each time.
  1. Lift up water pump and remove it.
    • When lifting up water pump, do not allow water pump gear to hit timing chain.

INSPECTION

  1. Check for badly rusted or corroded body assembly.
  2. Check for rough operation due to excessive end play.

INSTALLATION

  1. Apply engine oil and coolant to O-rings as shown in the figure.

  1. Install water pump.
    • Do not allow cylinder block to nip O-rings when installing water pump.

  1. Before installing, remove all traces of liquid gasket from mating surface of water pump cover and chain tensioner cover using a scraper. Also remove traces of liquid gasket from mating surface of front cover.

  1. Apply a continuous bead of liquid gasket to mating surface of chain tensioner cover and water pump cover.

  1. Return the crankshaft pulley to its original position by turning it 20° forward.

  1. Install timing chain tensioner, then remove the stopper pin.
    • When installing the timing chain tensioner, engine oil should be applied to the oil hole and tensioner.
    • After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to purge air from the high-pressure chamber of the chain tensioners. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.
  1. Install drain plug on cylinder block.
  2. Reinstall any parts removed in reverse order of removal.