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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 >> Assembly

CYLINDER BLOCK : Disassembly & Assembly: Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Thoroughly clean engine coolant and oil passages in cylinder block, as well as inside of crankcase and cylinder bores, with compressed air.
    CAUTION: Be sure to wear protective goggles for protection from flying substances.
  2. Install drain plug to cylinder block as shown.
    GNSALBIA0471Z-471Courtesy of NISSAN NORTH AMERICA, INC.
  3. Install oil jets (1).
    GNSAWBIA1941Z-941Courtesy of NISSAN NORTH AMERICA, INC.

    Oil jets (1)

    : 23.0 N.m (2.3 kg-m, 17 ft-lb)

    SYMBOL

    : Engine front
  4. Install main bearings and thrust bearings using following procedure:
    1. Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and ladder assembly.
    2. Install thrust bearings (1) to both sides of the No. 3 journal (A) housing on cylinder block.
      GNSJSBIA2498Z-498Courtesy of NISSAN NORTH AMERICA, INC.

      SYMBOL

      : Engine front
      • Install thrust bearings with the oil groove (B) facing crankshaft arm (outside).
    3. Install the main bearings paying attention to the direction.
      • Before installing bearing, lubricate bearing surface (inside) with clean engine oil.
        CAUTION: Do not apply engine oil to back surface of main bearings.
      • Check that the oil hole in cylinder block and the oil hole (A) in main bearing (1) are aligned. The main bearing without an oil hole goes in ladder assembly.
        G04811758Courtesy of NISSAN NORTH AMERICA, INC.
      • When installing, align main bearing stopper to the notch.
      • Ensure the oil holes on cylinder block and those on the corresponding bearing are aligned.
  5. Install signal plate to crankshaft (if removed).
    1. Set the signal plate with flange facing toward the counterweight side (engine front side).
    2. After positioning crankshaft (2) and signal plate (1) with positioning dowel pin (A), tighten bolts.
      GNSJPBIA0796Z-796Courtesy of NISSAN NORTH AMERICA, INC.

      (1)

      : Signal plate

      (2)

      : Crankshaft

      (A)

      : Dowel pin (used to position the signal plate)
    3. Remove dowel pin.
      CAUTION: Be sure to remove dowel pin.
  6. Install crankshaft to cylinder block.
    • While turning crankshaft by hand, check that it turns smoothly.
    CAUTION: Do not install rear oil seal yet.
  7. Install ladder assembly with the following procedure:
    NOTE: Ladder assembly cannot be replaced as a single part because it is machined together with cylinder block.
    1. Apply a bead (C) of liquid gasket with a suitable tool to ladder assembly (E) as shown.
      GNSALBIA0563Z-563Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE: After tightening ladder assembly, remove liquid gasket that protrudes at location (SYMBOL ) shown.

      (A)

      : Apply liquid gasket to end

      (B)

      : View B

      (D)

      : 1.5 mm (0.059 in)

      (F)

      : 3.4 - 4.4 mm (0.134 - 0.173 in)

      SYMBOL

      : Engine outside

      Use Genuine RTV Silicone Sealant or equivalent. Refer to HOW TO USE THIS INFORMATION : Recommended Chemical Products and Sealants .

    2. Apply new engine oil to threads and seat surfaces of the bolts.
    3. Tighten ladder assembly bolts to specified torque in the sequence shown.
      GNSAWBIA1940Z-940Courtesy of NISSAN NORTH AMERICA, INC.

      Step 1

      Bolts 1 - 10

      : 39.2 N.m (4.0 kg-m, 29 ft-lb)

      Step 2

      Bolts 11 - 22

      : 25.1 N.m (2.6 kg-m, 19 ft-lb)
      SYMBOL

      : Engine front
    4. Tighten bolts to specified in the sequence shown using Tool (A).
      GNSJPBIA0687Z-687Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Check tightening angle. Do not judge angle by visual inspection.

      Bolts 1 - 22

      : 60 deg. - 65 deg.

      Tool number (A)

      : KV10112100 (BT-8653-A)
    5. Install rear oil seal. Refer to Removal and Installation .
  8. Install piston to connecting rod with the following procedure:
    1. Install new snap ring to the groove of the piston rear side using snap ring pliers.
      • Insert it fully into groove to install.
      CAUTION: Do not reuse snap rings.
    2. Assemble piston to connecting rod.
      GNSAWBIA1430Z-430Courtesy of NISSAN NORTH AMERICA, INC.
      • Using a heat gun, heat piston until piston pin can be pushed in by hand without excess force [approximately 60 deg. C to 70 deg. C (140 deg. F to 158 deg. F)]. From the front to the rear, insert piston pin into piston and connecting rod.
      • Set so that the front mark (A) on the piston head, the oil splash (B) and the cylinder number (C) on connecting rod are positioned as shown.
        GNSJSBIA3397Z-397Courtesy of NISSAN NORTH AMERICA, INC.
    3. Install new snap ring to the groove of the piston front side.
      • Insert it fully into groove to install.
      • After installing, check that connecting rod moves smoothly.
  9. Install piston rings using suitable tool.
    GNSPBIC3752E-752Courtesy of NISSAN NORTH AMERICA, INC.
    • Position each ring with the gap as shown referring to the piston front mark (B).

      (A)

      : Oil ring upper or lower rail gap (either of them)

      (C)

      : Second ring and oil ring spacer gap

      (D)

      : Top ring gap
    • Install second ring with the stamped surface (E) facing upward.
    CAUTION:
    • Do not damage piston.
    • Do not damage piston rings by expanding them excessively.
    • Do not contact rail end gap under oil ring with oil drain cast groove of piston.
  10. Install connecting rod bearings to connecting rod and connecting rod cap.
    GNSJSBIA2505Z-505Courtesy of NISSAN NORTH AMERICA, INC.
    • When installing connecting rod bearings apply new engine oil to the bearing surface (inside).
      CAUTION: Do not apply engine oil to the back surface of connecting rod bearings.
    • When installing, align the connecting rod bearing stopper protrusion (A) with the cutout (B) of connecting rod and connecting rod cap to install.
    • Ensure the oil hole on connecting rod and that on the corresponding bearing are aligned.
  11. Install piston and connecting rod assembly to crankshaft.
    G04811767Courtesy of NISSAN NORTH AMERICA, INC.
    • Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
    • Apply new engine oil sufficiently to the cylinder bore, piston and crankshaft pin.
    • Match the cylinder position with the cylinder number on connecting rod to install.
    • Using a suitable tool (A), install piston with the front mark on the piston head facing the front of the engine.
      CAUTION: Do not damage the cylinder wall and crankshaft pin, resulting from an interference of the connecting rod big end.
  12. Install connecting rod cap.
    • Match the stamped cylinder number marks on connecting rod with those on connecting rod cap to install.
      GNSJSBIA2507Z-507Courtesy of NISSAN NORTH AMERICA, INC.

      (A)

      : Oil splash

      (B)

      : Small end diameter grade

      (C)

      : Production control number

      (D)

      : Bearing stopper groove

      (E)

      : Production control number

      (F)

      : Cylinder number

      (G)

      : Big end diameter grade
  13. Tighten connecting rod bolts using Tool (A) with the following procedure:
    1. Apply engine oil to the threads and seats of the connecting rod bolts.
    2. Tighten connecting rod cap bolts to the specified torque.

      Step 1

      : Tighten 27.4 N.m (2.8 kg-m, 20 ft-lb)

      Step 2

      : Loosen 0 N.m

      Step 3

      : 19.6 N.m (2.0 kg-m, 14 lb-ft)
    3. Tighten connecting rod cap bolts to the specified angle.
      CAUTION: Check tightening angle. Do not judge angle by visual inspection.
      GNSJPBIA0688Z-688Courtesy of NISSAN NORTH AMERICA, INC.

      Bolts

      : Tighten 90 deg. - 95 deg.

      Tool number (A)

      : KV10112100 (BT-8653-A)
    4. After tightening connecting rod bolts, check that crankshaft rotates smoothly.
    5. Check the connecting rod side clearance. Refer to CYLINDER BLOCK : Inspection .
  14. Install drive plate (1).
    GNSAWBIA0220Z-220Courtesy of NISSAN NORTH AMERICA, INC.
    • Install drive plate, reinforcement plate (2) and pilot converter (3) as shown.
    • Using a drift with 33 mm (1.30 in) diameter, push pilot converter into the end of the crankshaft (A) until it stops.

    (B)

    : Rounded

    (C)

    : Chamfered
    SYMBOL

    Engine front
  15. Install knock sensors (1).
    GNSJSBIA3399Z-399Courtesy of NISSAN NORTH AMERICA, INC.
    • Install knock sensor with connector facing +/- 15 deg. (a) as shown.
    CAUTION:
    • Do not tighten bolts while holding connector.
    • If any impact by dropping is applied to knock sensor, replace it with a new one.
    NOTE:
    • Check that there is no foreign material on the cylinder block mating surface and the back surface of knock sensor.
    • Check that knock sensor does not interfere with other parts.
  16. Install crankshaft position sensor (POS).
    CAUTION: Do not reuse O-ring.
  17. Assembly of remaining components is in the reverse order of disassembly.
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