Disassembly and Assembly: Disassembly

Remove the following parts:
- Intake manifold collector: Refer to "EXPLODED VIEW ".
- Intake manifold: Refer to "EXPLODED VIEW ".
- Oil pans (lower and upper): Refer to "EXPLODED VIEW ".
- Front and rear timing chain case: Refer to "EXPLODED VIEW ".
- Cylinder head: Refer to "EXPLODED VIEW ".
Remove knock sensor.
CAUTION: Carefully handle sensor avoiding shocks.
Remove rear oil seal retainer.
- Remove by inserting screwdriver between main bearing cap and rear oil seal retainer.
  CAUTION: If rear oil seal retainer is removed, replace it with new one.
  
  NOTE: Regard both rear oil seal and retainer as an assembly.
Remove baffle plate from main bearing beam.
Remove piston and connecting rod assembly with the following procedure:
- Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to "INSPECTION ".
  CAUTION: Be careful not to drop connecting rod bearing, and to scratch the surface.
  1. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
  2. Remove connecting rod bearing cap.
  3. Using a hammer handle or similar tool, push piston and connecting rod assembly out to the cylinder head side.
    CAUTION: Be careful not to damage the cylinder wall and crankshaft pin, resulting from an interference of the connecting rod big end.
    
    Fig 1: Pushing Piston And Connecting Rod Assembly Using Hammer Handle
    Courtesy of NISSAN MOTOR CO., U.S.A.
Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
- Be careful not to drop connecting rod bearing, and to scratch the surface.
- Identify installation positions, and store them without mixing them up.
Remove piston rings form piston.
- Before removing piston rings, check the piston ring side clearance. Refer to "INSPECTION ".
- Use a piston ring expander (commercial service tool) (A).
  CAUTION:
  - When removing piston rings, be careful not to damage piston.
  - Be careful not to damage piston rings by expanding them excessively.
    
    Fig 2: Removing Piston Rings Form Piston Using Piston Ring Expander
    Courtesy of NISSAN MOTOR CO., U.S.A.
Remove piston from connecting rod as follows:
1. Using a snap ring pliers (A), remove snap rings.
  
  Fig 3: Removing Snap Rings Using Snap Ring Plier
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Heat piston to 60 to 70°C (140 to 158°F) with an industrial use drier (A) or equivalent.
  
  Fig 4: Heating Piston
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Push out piston pin with stick of outer diameter approximately 20 mm (0.79 in).
  
  Fig 5: Pushing Out Piston Pin
  Courtesy of NISSAN MOTOR CO., U.S.A.
Remove main bearing cap bolts.
NOTE:
- Before loosening main bearing cap bolts, measure the crankshaft end play. Refer to "INSPECTION ".
- Loosen main bearing cap bolts in the reverse order shown in the illustration in several different steps.
  
  Fig 6: Main Bearing Cap Bolts (With Tightening Sequence)
  Courtesy of NISSAN MOTOR CO., U.S.A.
Remove main bearing beam.

Fig 7: Identifying Main Bearing Beam Marks
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove main bearing caps.
CAUTION: Be careful not to drop main bearing, and to scratch the surface.
- Using main bearing cap bolts, remove main bearing cap while shaking it back-and-forth.
  
  Fig 8: Removing Main Bearing Caps
  Courtesy of NISSAN MOTOR CO., U.S.A.
Remove crankshaft.
Remove main bearings and thrust bearings from cylinder block and main bearing caps.
CAUTION:
- Be careful not to drop main bearing, and to scratch the surface.
- Identify installation positions, and store them without mixing them up.
Remove oil jet.