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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Engine Mechanical - QG18DE) >> Cylinder Block >> Disassembly >> Piston And Crankshaft

Piston And Crankshaft

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Attach engine to Tools as shown.
  2. Drain any remaining engine coolant and oil.
  3. Remove timing chain. Refer to "REMOVAL ".
    Fig 1: Attaching Engine To Tools
    G00774074Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove pistons with connecting rod.
    • When disassembling piston and connecting rod, remove snap ring first. Then heat piston to 60° to 70°C (140° to 158°F) or use piston pin press stand at room temperature.
    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 punch mark, install with either side up.
  5. Measure crankshaft end play. Refer to "CRANKSHAFT ".
    Fig 2: Heating Pistons
    G00774075Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Loosen main bearing caps in numerical order as shown in two or three steps.
    Fig 3: Identifying Removal Sequence Of Main Bearing Cap Bolts
    G00774076Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove bearing caps, main bearings and crankshaft.
  8. Remove signal plate from crankshaft.
    Fig 4: Removing Signal Plate From Crankshaft
    G00774077Courtesy of NISSAN MOTOR CO., U.S.A.
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