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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical (Pr25DD) (2 Of 2)) >> Disassembly And Assembly >> Cylinder Block >> CYLINDER BLOCK : Disassembly & Assembly >> Disassembly

CYLINDER BLOCK : Disassembly & Assembly: Disassembly

WARNING: This page is about a different variant/trim than selected.
  1. Mount the engine on a suitable engine stand. Refer to Setting  (FWD) or Setting  (AWD).
  2. Drain any remaining engine oil and engine coolant (if necessary).
  3. Remove drain plugs from cylinder block.
  4. Remove cylinder head. Refer to Removal and Installation .
  5. Remove oil pan (upper). Refer to Removal and Installation .
  6. Remove the water pump housing. Refer to Exploded View .
  7. Remove knock sensors.
    CAUTION: Carefully handle knock sensor avoiding shocks.
  8. Remove crankshaft position sensor.
    CAUTION:
    • Avoid impacts such as dropping.
    • Do not disassemble.
    • Keep crankshaft position sensor away from metal particles.
    • Do not place crankshaft position sensor in a location where it is exposed to magnetism.
  9. Remove piston and connecting rod assembly with the following procedure:
    1. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
    2. Remove connecting rod cap. Number connecting rod caps so they can be assembled in the same position and direction.
    3. Using a suitable tool, push piston and connecting rod assembly out to cylinder head side.
      G04146443Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION:
      • Do not damage matching surface with connecting rod cap.
      • Do not damage cylinder wall and crankshaft pin when removing piston and connecting rod assembly.
      NOTE: Number the pistons and rods so they can be installed in the same position.
  10. Remove connecting rod bearings.
    CAUTION: When removing them note the installation position. Keep them in the correct order.
  11. Remove piston rings from piston.
    • Before removing piston rings check the piston ring side clearance. Refer to CYLINDER BLOCK : Inspection .
    • Remove piston rings using suitable tool (A).
      GNSJPBIA0194Z-194Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION:
      • When removing piston rings, do not damage the piston.
      • Do not damage piston rings by expanding them excessively.
  12. Remove piston from connecting rod using the following procedure:
    1. Remove snap rings using snap ring pliers (A).
      GNSJPBIA0195Z-195Courtesy of NISSAN NORTH AMERICA, INC.
    2. Heat piston to 60 deg. C to 70 deg. C (140 deg. F to 158 deg. F) with a suitable tool (A).
      GNSJPBIA0196Z-196Courtesy of NISSAN NORTH AMERICA, INC.
    3. Push out piston pin using a suitable tool.
      G04073104Courtesy of NISSAN NORTH AMERICA, INC.
  13. Remove ladder assembly using the following procedure:
    1. Loosen and remove ladder assembly bolts in reverse of the sequence shown.
      Fig 1: Ladder Assembly Bolts Tightening Sequence
      GNSAWBIA1940Z-940Courtesy of NISSAN NORTH AMERICA, INC.

      SYMBOL

      : Engine front
    2. Remove the ladder assembly using Tool (A).
      G04899890Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Do not damage the mating surfaces.
      NOTE: In areas where the cutter is difficult to use, use a plastic hammer to lightly tap (1) the cutter where the liquid gasket is applied. Use a plastic hammer to slide (2) the cutter by tapping on the side.

      Tool number (A)

      : KV10111100 (J-37228)
    3. Remove the ladder assembly while tapping lightly with a plastic hammer.
  14. Remove crankshaft (2).
    G06537056Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Do not damage or deform signal plate (1) mounted on crankshaft.
    • When setting crankshaft on a flat floor surface, use a block of wood to avoid contact between signal plate and floor surface.
    • Do not remove signal plate unless it is necessary.
    NOTE: When removing or installing signal plate, use socket (size T30).
  15. Remove main bearing (upper and lower) and thrust bearings from cylinder block and ladder assembly.
    CAUTION: When removing bearings note the installation position. Keep them in the correct order.
    NOTE: When removing the rear oil seal without removing the cylinder block, use a suitable tool to pull it out between the crankshaft and block.
  16. Remove oil jets (1) from cylinder block (if necessary).
    GNSAWBIA1941Z-941Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: When removing oil jet assemblies note the installation position. Keep them in the correct order.

    SYMBOL

    : Engine front
  17. Inspect dowel pins, welch plugs and threaded plugs and remove if necessary.
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