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Disassembly And Assembly: Disassembly

WARNING: This page is about a different car, the 2004 Infiniti M45 and 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Explained here is how to disassemble with engine stand supporting transmission surface. When using different type of engine stand, note with difference in steps and etc.
  1. Remove engine assembly. Refer to ENGINE ASSEMBLY .
  2. Remove the parts that may restrict installation of engine to widely use engine stand.
    NOTE: The procedure is described assuming that you use a widely use engine stand holding the surface, to which transmission is installed.
    1. Remove drive plate as follows:
      1. Remove rear plate cover. Refer to OIL PAN AND OIL STRAINER .
      2. Set the ring gear stopper (SST).
      3. Loosen fixing bolts diagonally.
        CAUTION:
        • Be careful not to damage drive plate. Especially, avoid deforming and damaging of signal plate teeth (circumference position).
        • Place drive plate with signal plate surface facing other than downward.
        • Keep magnetic materials away from signal plate.
    2. Remove engine rear plate.
  3. Lift the engine with hoist to install it onto the widely use engine stand.
    Fig 1: Setting Ring Gear Stopper (SST)
    G00796978Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Use an engine stand that has a load capacity (240 kg or more) large enough for supporting the engine weight.
    • If the load capacity of the stand is not adequate, remove the following parts beforehand to reduce the potential risk of overturning the stand.
    • Remove intake manifold upper and intake manifold lower. Refer to INTAKE MANIFOLD .
    • Remove fuel injector and fuel tube (left and right). Refer to FUEL INJECTOR AND FUEL TUBE .
    • Remove ignition coil. Refer to IGNITION COIL .
    • Remove rocker cover. Refer to ROCKER COVER .
    • Other removable brackets.
      NOTE: The figure shows an example of widely use engine stand that can hold mating surface of transmission with drive plate and rear plate removed.
      CAUTION: Before removing the hanging chains, make sure the engine stand is stable and there is no risk of overturning.
      Fig 2: Using Engine Stand To Support Engine Assembly
      G00796979Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Drain engine oil. Refer to CHANGING ENGINE OIL .
  5. Drain engine coolant from inside of engine by removing water drain plug "B" as shown in the figure.
    Fig 3: Identifying Components That Should Be Replaced After Disassembly
    G00796980Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Remove oil pan and oil strainer. Refer to OIL PAN AND OIL STRAINER .
  7. Remove crankshaft pulley as follows:
    1. Lock crankshaft with a hammer handle or similar tool to loosen fixing bolt.
    2. Pull crankshaft pulley with both hands to remove it.
      CAUTION:
      • Do not remove fixing bolts. Keep loosened fixing bolts in place to protect removed crankshaft pulley from dropping.
      • Do not remove balance weight (inner hexagon bolt) at the front of crankshaft pulley.
        Fig 4: Locking Crankshaft With Hammer Handle Or Similar Tool
        G00796981Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove the following components and associated parts (The parts listed in step 3 are not included here.)
  9. Remove knock sensor.
    CAUTION: Carefully handle the sensor, avoiding shocks.
  10. Remove piston and connecting rod assembly.
    1. Position crankshaft pin corresponding to the connecting rod to be removed onto the bottom dead center.
    2. Remove connecting rod cap.
    3. Using a hammer handle or similar tool, push piston and connecting rod assembly out to the cylinder head side.
  11. Remove connecting rod bearings from connecting rod and connecting rod cap.
    Fig 5: Removing Piston & Connecting Rod Assembly
    G00796982Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • When removing them, note the installation position. Keep them in the correct order.
  12. Remove piston rings form piston.
    • Before removing piston rings, check the piston ring side clearance. Refer to PISTON RING SIDE CLEARANCE .
      Fig 6: Removing Piston Rings With Piston Ring Expander
      G00796983Courtesy of NISSAN MOTOR CO., U.S.A.
    • Use the piston ring expander (commercial service tool).
      CAUTION:
      • When removing piston rings, be careful not to damage piston.
      • Be careful not to damage piston rings by expanding them excessively.
  13. Remove piston from the connecting rod as follows.
    1. Using the snap ring pliers, remove snap ring.
      Fig 7: Removing Piston From Connecting Rod Using Snap Ring Pliers
      G00796984Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Heat piston to 60 to 70°C (140 to 158 ° F) with industrial use drier or equivalent.
      Fig 8: Heating Piston With Industrial Use Drier
      G00796985Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Push out piston pin with stick of outer diameter approximately 20 mm (0.8 in).
      Fig 9: Pushing Out Piston Pin With Stick Measuring 20mm In Diameter
      G00796986Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove rear oil seal retainer from cylinder block.
    • Insert a minus-head screwdriver or similar tool between the rear end of the crankshaft counter weight and rear oil seal retainer, and separate the liquid gasket to remove.
    CAUTION: Be careful not to damage the mating surface.
  15. Using a minus-head screwdriver or similar tool, and lever off rear oil seal from rear oil seal retainer.
  16. Remove main bearing cap as follows:
    • Before loosening main bearing cap bolts, measure the crankshaft end play. Refer to CRANKSHAFT END PLAY .
    • Loosen bolts in several different steps.
    1. Remove cover attached to the rear right side of cylinder block (next to the starter motor housing).
      Fig 10: Identifying Locations Of Cylinder Block Bolts
      G00796987Courtesy of NISSAN MOTOR CO., U.S.A.
      NOTE: Bolts (No. 28 shown in the figure) are installed on inside of the cover.
    2. Loosen the side bolts (M10) starting from 30 to 21 to remove.
    3. Loosen main bearing cap sub bolts (M9) starting from 20 to 11 to remove.
    4. Loosen main bearing cap bolts (M12) starting from 10 to 1 to remove.
    5. Using the main bearing cap remover (SST), remove main bearing cap.
      Fig 11: Removing Main Bearing Cap Using Bearing Cap Remover
      G00796988Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Remove crankshaft.
  18. Remove main bearings and thrust bearings from cylinder block and main bearing caps.
    • When removing them, note the installation position. Keep them in the correct order.
  19. If pilot converter must be removed, remove it from the rear end of crankshaft using the pilot bushing puller (SST).
    • Removal and installation without the engine stand is possible.
    Fig 12: Removing Pilot Converter From Crankshaft Using Pilot Bushing Puller
    G00796989Courtesy of NISSAN MOTOR CO., U.S.A.
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