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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 809 (Engine Mechanical) >> Cylinder Block >> Disassembly >> Piston, Crankshaft And Oil Jet

Piston, Crankshaft And Oil Jet

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove engine. Refer to REMOVAL AND INSTALLATION .
  2. Place engine on a work stand.
    Fig 1: Assembling Work Stand Bracket To Cylinder Block
    G02032318Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Placing Engine On Work Stand
    G02032319Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Drain coolant and oil.
  4. Remove oil pan. Refer to REMOVAL .
  5. Remove timing chain. Refer to REMOVAL .
  6. Remove cylinder head. Refer to REMOVAL .
  7. Remove baffle plate from main bearing beam.
  8. Remove pistons with connecting rods.
    • When disassembling piston and connecting rod, remove snap ring first, then heat piston to 60 to 70°C (140 to 158°F).
      • Fig 3: Heating Pistons
      G02032320Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Remove rear oil seal retainer.
    CAUTION:
    • When piston rings are not replaced, make sure that piston rings are mounted in their original positions.
    • When replacing piston rings, if there is no punchmark, install with either side up.
  10. Loosen bolts in numerical order as shown and remove main bearing beam, bearing cap and crankshaft.
    • Before removing bearing beam and bearing cap, measure crankshaft end play. Refer to  OIL JET  . 
    • Bolts should be loosened in two or three steps. 
      • Fig 4: Main Bearing Beam Bolt Removal Sequence
      G02032321Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove oil jets.
    Fig 5: Identifying Oil Jet Knock Pins
    G02032322Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove knock sensor.
    CAUTION: Carefully handle the sensor and avoid impacts.
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