Nissan Quest 2001-02 and 2004-06

Engine

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Removal & Installation



3.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the battery cables.
  4.  
  5. Drain the engine oil, coolant and transmission fluid.
  6.  
  7. Remove the cowl top extension.
  8.  
  9. Disconnect the engine harness from the Powertrain Control Module (PCM) and the two connections at the right hand strut tower.
  10.  
  11. Disconnect the engine harness ground connections.
  12.  
  13. Disconnect the coolant valve and position the valve aside.
  14.  
  15. Disconnect the Mass Air Flow (MAF) sensor connector.
  16.  
  17. Remove the fresh air intake tube and air cleaner-to-electric throttle control actuator tube attached to the air cleaner lid.
  18.  
  19. Remove the lower air cleaner case.
  20.  
  21. Remove the engine cover.
  22.  
  23. Remove the battery and tray.
  24.  
  25. Relieve the fuel system pressure.
  26.  
  27. Disconnect fuel hose quick connection at vehicle piping side as follows:
    1. Remove the connector cap from the fuel hose.
    2.  
    3. Squeeze the two tabs and pull the fuel hose from the fuel line.
    4.  

  28.  


NOTE
If the connector and the tube are stuck together, push and pull several times until they start to move, then disconnect them by pulling.


CAUTION
The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.


NOTE
Do not use any tools to remove the quick connector. Keep the resin tube away from heat. Be especially careful when welding near the tube.- Prevent acid liquids such as battery electrolyte, etc. from getting on the resin tube. Do not bend or twist the tube during removal or installation. Do not remove the remaining retainer on the tube. When the tube is replaced, also replace the retainer with a new one. To keep the connecting portion clean and to avoid damage and foreign materials entering, cover the ends of the fuel tubes with plastic bags or something similar.

  1. Remove the radiator assembly, coolant reservoir, and hoses.
  2.  
  3. Disconnect the power brake booster vacuum hose from the back of the intake manifold collector.
  4.  
  5. Disconnect the EVAP canister purge volume control solenoid valve hose.
  6.  
  7. Disconnect heater hoses at the water outlet and heater pipe.
  8.  
  9. Disconnect the two fusible link connectors at the positive battery terminal.
  10.  
  11. Disconnect two engine harness connectors below the MAF sensor attached to the shock tower.
  12.  
  13. Disconnect the harness retainers and position the engine harness aside.
  14.  
  15. Remove the ground cable and ground wire from transaxle.
  16.  
  17. Disconnect the transaxle shift controls.
  18.  
  19. Remove the drive belts.
  20.  
  21. Remove the front exhaust tube and hanger.
  22.  
  23. Remove the front drive shafts.
  24.  
  25. Remove the lower ball joint pinch bolt, then separate the transverse link from the steering knuckle.
  26.  
  27. Remove the power steering line bracket from the front suspension member.
  28.  
  29. Remove the mounting bolts on the lower side of the steering gear.
  30.  
  31. Disconnect the front engine mount electrical connector.
  32.  
  33. Disconnect the connecting rod from the front.
  34.  
  35. Disconnect the power steering line brackets from the rear engine mount insulator and rear of the lower intake manifold collector.
  36.  
  37. Remove engine oil cooler pipe bolts.
  38.  
  39. Discharge and recover the A/C refrigerant.
  40.  
  41. Remove A/C low and high-pressure flexible hoses.
  42.  
  43. Remove the A/C compressor.
  44.  
  45. Disconnect the transaxle breather hose.
  46.  
  47. Disconnect the power steering pressure switch.
  48.  
  49. Disconnect the harness retainer from power steering oil pump bracket.
  50.  
  51. Remove the power steering adjusting bar and power steering pump, without disconnecting the lines from the engine and position and secure it aside.
  52.  
  53. Remove the Crankshaft Position (CKP) sensor.
  54.  
  55. Remove the rear cover plate and bolts securing the torque converter-to-drive plate.
  56.  
  57. Position a transmission jack under the engine/transaxle assembly.
  58.  
  59. On 4 speed transmission equipped vehicles, remove the left hand transaxle mount through bolt.
  60.  
  61. Remove the right hand engine mount insulator nuts and bolt.
  62.  
  63. Remove the front suspension member and engine/transaxle assembly as follows:
    1. Remove the right and left hand member pin stay bolts.
    2.  
    3. Remove the front suspension member nuts and cups and carefully lower the front suspension member and engine/transaxle assembly avoiding interference with the vehicle body.
    4.  

  64.  


CAUTION
Make sure to disconnect electrically controlled engine mounting insulator harness clips from the front suspension member prior to removal.- Before and during this procedure, always check if any harnesses are left connected. Avoid any damage to, or any oil/grease smearing or spills onto the engine mounting insulators.

  1. Remove the starter motor.
  2.  
  3. Disconnect the electrical connectors, harness retainers and remove the harnesses.
  4.  
  5. Disconnect the transmission cooler hoses and remove the cooler.
  6.  
  7. Remove the front and rear engine mount through bolts.
  8.  
  9. On 5 speed transmission equipped models, remove the left hand transaxle mount bolts.
  10.  
  11. Raise the engine/transaxle and remove the front suspension member.
  12.  
  13. Remove the transmission cooler valve from the engine with the hoses attached.
  14.  
  15. Separate the engine and transaxle and mount the engine on a suitable engine stand.
  16.  

To install:



Click image to see an enlarged view

Fig. Exploded view of the engine mounting-3.5L engine



Click image to see an enlarged view

Fig. Exploded view of the front suspension member mounting-3.5L engine



Click image to see an enlarged view

Fig. Exploded view of the front suspension member mounting-3.5L engine

  1. Installation is in the reverse order of removal. Tighten the bolts to the specifications shown in the engine mounting and front suspension member exploded view illustrations and note the following steps:
    1. With converter installed, rotate crankshaft several turns to check that transaxle rotates freely without binding. Tighten the transmission-to-engine bolts for the 4 or 5 speed transmission vehicles as shown in the accompanying illustrations.
    2.  


      Click image to see an enlarged view

      Fig. Exploded view of the 4 speed transmission-to-engine torque sequence and specifications-3.5L engine



      Click image to see an enlarged view

      Fig. Exploded view of the 5 speed transmission-to-engine torque sequence and specifications-3.5L engine

    3. Tighten the converter-to-drive plate bolts to 40 ft. lbs. (54 Nm).
    4.  
    5. Tighten the rear cover plate bolt to 61 inch lbs. (7 Nm).
    6.  
    7. Tighten the CKP sensor to 85 inch lbs. (10 Nm).
    8.  
    9. Fill the engine with oil, and coolant and recharge the A/C system.
    10.  
    11. Check for any leaks and for proper vehicle operation.
    12.  

  2.  

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Disconnect the battery cables.
  4.  
  5. Drain the engine oil, coolant and transmission fluid.
  6.  
  7. Remove the cowl top extension.
  8.  
  9. Disconnect the engine harness from the Powertrain Control Module (PCM) and the two connections at the right hand strut tower.
  10.  
  11. Disconnect the engine harness ground connections.
  12.  
  13. Disconnect the coolant valve and position the valve aside.
  14.  
  15. Disconnect the Mass Air Flow (MAF) sensor connector.
  16.  
  17. Remove the fresh air intake tube and air cleaner-to-electric throttle control actuator tube attached to the air cleaner lid.
  18.  
  19. Remove the lower air cleaner case.
  20.  
  21. Remove the engine cover.
  22.  
  23. Remove the battery and tray.
  24.  
  25. Relieve the fuel system pressure.
  26.  
  27. Disconnect fuel hose quick connection at vehicle piping side as follows:
    1. Remove the connector cap from the fuel hose.
    2.  
    3. Squeeze the two tabs and pull the fuel hose from the fuel line.
      NOTE
      If the connector and the tube are stuck together, push and pull several times until they start to move, then disconnect them by pulling.


      CAUTION
      The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.


      NOTE
      Do not use any tools to remove the quick connector. Keep the resin tube away from heat. Be especially careful when welding near the tube.- Prevent acid liquids such as battery electrolyte, etc. from getting on the resin tube. Do not bend or twist the tube during removal or installation. Do not remove the remaining retainer on the tube. When the tube is replaced, also replace the retainer with a new one. To keep the connecting portion clean and to avoid damage and foreign materials entering, cover the ends of the fuel tubes with plastic bags or something similar.

    4.  

  28.  
  29. Remove the radiator assembly, coolant reservoir, and hoses.
  30.  
  31. Disconnect the power brake booster vacuum hose from the back of the intake manifold collector.
  32.  
  33. Disconnect the EVAP canister purge volume control solenoid valve hose.
  34.  
  35. Disconnect heater hoses at the water outlet and heater pipe.
  36.  
  37. Disconnect the two fusible link connectors at the positive battery terminal.
  38.  
  39. Disconnect two engine harness connectors below the MAF sensor attached to the shock tower.
  40.  
  41. Disconnect the harness retainers and position the engine harness aside.
  42.  
  43. Remove the ground cable and ground wire from transaxle.
  44.  
  45. Disconnect the transaxle shift controls.
  46.  
  47. Remove the drive belts.
  48.  
  49. Remove the front exhaust tube and hanger.
  50.  
  51. Remove the front drive shafts.
  52.  
  53. Remove the lower ball joint pinch bolt, then separate the transverse link from the steering knuckle.
  54.  
  55. Remove the power steering line bracket from the front suspension member.
  56.  
  57. Remove the mounting bolts on the lower side of the steering gear.
  58.  
  59. Disconnect the front engine mount electrical connector.
  60.  
  61. Disconnect the connecting rod from the front.
  62.  
  63. Disconnect the power steering line brackets from the rear engine mount insulator and rear of the lower intake manifold collector.
  64.  
  65. Remove engine oil cooler pipe bolts.
  66.  
  67. Discharge and recover the A/C refrigerant.
  68.  
  69. Remove A/C low and high-pressure flexible hoses.
  70.  
  71. Remove the A/C compressor.
  72.  
  73. Disconnect the transaxle breather hose.
  74.  
  75. Disconnect the power steering pressure switch.
  76.  
  77. Disconnect the harness retainer from power steering oil pump bracket.
  78.  
  79. Remove the power steering adjusting bar and power steering pump, without disconnecting the lines from the engine and position and secure it aside.
  80.  
  81. Remove the Crankshaft Position (CKP) sensor.
  82.  
  83. Remove the rear cover plate and bolts securing the torque converter-to-drive plate.
  84.  
  85. Position a transmission jack under the engine/transaxle assembly.
  86.  
  87. On 4 speed transmission equipped vehicles, remove the left hand transaxle mount through bolt.
  88.  
  89. Remove the right hand engine mount insulator nuts and bolt.
  90.  
  91. Remove the front suspension member and engine/transaxle assembly as follows:
    1. Remove the right and left hand member pin stay bolts.
    2.  
    3. Remove the front suspension member nuts and cups and carefully lower the front suspension member and engine/transaxle assembly avoiding interference with the vehicle body.
      CAUTION
      Make sure to disconnect electrically controlled engine mounting insulator harness clips from the front suspension member prior to removal.- Before and during this procedure, always check if any harnesses are left connected. Avoid any damage to, or any oil/grease smearing or spills onto the engine mounting insulators.

    4.  

  92.  
  93. Remove the starter motor.
  94.  
  95. Disconnect the electrical connectors, harness retainers and remove the harnesses.
  96.  
  97. Disconnect the transmission cooler hoses and remove the cooler.
  98.  
  99. Remove the front and rear engine mount through bolts.
  100.  
  101. On 5 speed transmission equipped models, remove the left hand transaxle mount bolts.
  102.  
  103. Raise the engine/transaxle and remove the front suspension member.
  104.  
  105. Remove the transmission cooler valve from the engine with the hoses attached.
  106.  
  107. Separate the engine and transaxle and mount the engine on a suitable engine stand.
  108.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the engine mounting-3.5L engine



Click image to see an enlarged view

Fig. Exploded view of the front suspension member mounting-3.5L engine



Click image to see an enlarged view

Fig. Exploded view of the front suspension member mounting-3.5L engine

  1. Installation is in the reverse order of removal. Tighten the bolts to the specifications shown in the engine mounting and front suspension member exploded view illustrations and note the following steps:
    1. With converter installed, rotate crankshaft several turns to check that transaxle rotates freely without binding. Tighten the transmission-to-engine bolts for the 4 or 5 speed transmission vehicles as shown in the accompanying illustrations.

      Click image to see an enlarged view

      Fig. Exploded view of the 4 speed transmission-to-engine torque sequence and specifications-3.5L engine



      Click image to see an enlarged view

      Fig. Exploded view of the 5 speed transmission-to-engine torque sequence and specifications-3.5L engine

    2.  
    3. Tighten the converter-to-drive plate bolts to 40 ft. lbs. (54 Nm).
    4.  
    5. Tighten the rear cover plate bolt to 61 inch lbs. (7 Nm).
    6.  
    7. Tighten the CKP sensor to 85 inch lbs. (10 Nm).
    8.  
    9. Fill the engine with oil, and coolant and recharge the A/C system.
    10.  
    11. Check for any leaks and for proper vehicle operation.
    12.  

  2.  

 
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