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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2138 (Engine Mechanical) >> Unit Disassembly And Assembly >> Engine Unit >> Disassembly and Assembly >> Disassembly
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Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following procedures explain how to disassemble the engine with the engine stand fastened to the bell housing. Some steps may be different if using a different type of engine stand.
  1. Remove engine assembly from vehicle. Refer to "REMOVAL AND INSTALLATION ".
  2. Remove both exhaust manifolds. Refer to "REMOVAL AND INSTALLATION (EXHAUST MANIFOLD) ".
  3. Remove pilot converter (A/T models) using Tool as necessary.

    Tool number : ST16610001 (J-23907) 

    Fig 1: Removing Pilot Converter (A/T Models)
    G07152140
  4. Lift engine, and mount to engine stand.
    CAUTION: Before removing the hanging chains, make sure engine stand is stable and there is no risk of overturning.
    Fig 2: Lifting Engine
    G07152141
    • Any widely used commercially available engine stand can be used.
      CAUTION: Use engine stand that has a load capacity large enough to support the engine's weight [approximately 220 kg (441 lb) or more].
      Fig 3: Identifying Engine Stand
      G07152142
  5. Drain engine coolant by removing the cylinder block drain plugs (A), (B), (C) and (D) from cylinder block as shown.
    NOTE: For Canada, (D) is not plug but block heater.
    Fig 4: Identifying Washers
    G07152143
  6. Remove cylinder heads. Refer to "REMOVAL AND INSTALLATION ".
  7. Remove sub harness, and remove knock sensors.
    CAUTION: Handle sensor carefully; do not shock or drop.
  8. Remove piston and connecting rod assembly as follows:
    • Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to "INSPECTION AFTER DISASSEMBLY ".
      CAUTION: Be careful not to drop connecting rod bearing or to scratch the bearing surface.
  9. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
  10. Remove connecting rod bearing cap.
  11. Push piston and connecting rod assembly out of the cylinder head side using suitable tool.
    CAUTION: Be careful not to damage the cylinder wall or crankshaft pin resulting from an interference of the connecting rod big end.
    Fig 5: Pushing Piston And Connecting Rod Assembly
    G07152144
  12. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
    CAUTION: Identify installation position, and store them without mixing them up.
  13. Remove piston rings from piston.
    • Before removing piston rings, check the piston ring side clearance. Refer to "INSPECTION AFTER DISASSEMBLY ".
    • Remove piston rings using piston ring expander or suitable tool.
      CAUTION:
      • When removing piston rings, be careful not to damage piston.
      • Be careful not to damage piston rings by expanding them excessively.
        Fig 6: Removing/Installing Piston Rings Using Piston Ring Expander
        G07152145
  14. Remove piston from connecting rod as follows:
    1. Remove snap ring using snap ring pliers.
      Fig 7: Removing Snap Ring
      G07152146
    2. Heat piston to 60° to 70°C (140° to 158°F) with industrial use drier or equivalent.
      Fig 8: Applying Heat To Piston
      G07152147
    3. Push out piston pin with drift which has an outer diameter of approximately 20 mm (0.79 in).
      Fig 9: Pushing Piston Pin
      G07152148
  15. Remove lower cylinder block bolts.
    • Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to "INSPECTION AFTER DISASSEMBLY ".
    • Loosen lower cylinder block bolts in reverse order as shown in several different steps.
      NOTE: Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).
      Fig 10: Lower Cylinder Block Bolts (Reverse For Loosening)
      G07152149
  16. Remove lower cylinder block.
    • Cut liquid gasket for removal using Tool. Refer to "PRECAUTION FOR LIQUID GASKET ".

      Tool number : KV10111100 (J-37228) 

      CAUTION: Be careful not to damage the mounting surfaces.
  17. Remove crankshaft.
  18. Pull rear oil seal out from rear end of crankshaft.
    NOTE: When replacing rear oil seal without removing lower cylinder block, use a suitable tool to pull the rear oil seal installed between crankshaft and cylinder block out.
    CAUTION: Be careful not to damage crankshaft or cylinder block.
  19. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
    CAUTION:
    • Do not drop main bearing, and to scratch the surface.
    • Identify installation positions, and store them without mixing them up.
  20. Remove oil jet.
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