LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2012 >> G37 IPL, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Engine Mechanical) >> Unit Disassembly And Assembly >> Cylinder Block >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

WARNING: This page is about a different car, the 2012 Infiniti G25. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Do not reuse washer.
  1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to remove any foreign material.
    CAUTION: Use a goggles to protect your eye.
  2. Install each plug to cylinder block as shown in the figure.
    Fig 1: Identifying Drain Plug And Plug
    G08456403Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Do not reuse washer.
    • Apply liquid gasket to the screw of each plug before tightening.
    • Replace washers.
    • For gasket name, the presence/absence of washer, and tightening torque, refer to the following list.
    • Tighten each plug as specified below.
    Part Washer Tightening torque
    1 New No 6.0 N.m (0.6 kg-m, 53 in-lb)
    Reuse No 9.8 N.m (1.0 kg-m, 87 in-lb)
    2 No 19.6 N.m (2.0 kg-m, 14 ft-lb)
    3 Yes 12.3 N.m (1.3 kg-m, 9 ft-lb)
    4 Yes 62.0 N.m (6.3 kg-m, 45 ft-lb)
  3. Install main bearings and thrust bearings as follows:
    CAUTION: Never drop main bearing, and to scratch the surface.
    1. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and lower cylinder block.
    2. Install thrust bearings (1) to the both sides of the No. 3 journal housing on cylinder block.
      Fig 2: Identifying Thrust Bearing Installation Position
      G08456404Courtesy of NISSAN NORTH AMERICA, INC.
      • Install thrust bearings with the oil groove (E) facing crankshaft arm (outside).
    3. Install main bearings paying attention to the direction.
      Fig 3: Identifying Main Bearings
      G08456405Courtesy of NISSAN NORTH AMERICA, INC.
      • Main bearing with oil hole (B) and groove (C) goes on cylinder block. The one without them goes on lower cylinder block.
      • Before installing main bearings, apply engine oil to the bearing surface (inside). Do not apply engine oil to the back surface, but thoroughly clean it.
      • When installing, align main bearing stopper protrusion to cutout of cylinder block and lower cylinder block.
      • Ensure the oil holes on cylinder block and those on the corresponding bearing are aligned.
  4. Install crankshaft to cylinder block.
    • While turning crankshaft by hand, check that it turns smoothly.
  5. Install main bearing cap.
    • Use a cast-embossed mark to identify main bearing cap. To install main bearing cap, face front mark (E) to the front side.
      Fig 4: Identifying Main Bearing Cap And Front Mark
      G08456406Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE: Since the main bearing cap is assembled with a cylinder block, always replace as an assembly part.
  6. Check outside diameter of the main bearing cap bolt. Refer to "INSPECTION "
  7. Tighten main bearing cap bolt, according to the following procedure.
    1. Apply engine oil to the screw and the bearing surface of each bolt.
    2. Tighten main bearing cap bolts, according to the numerical order shown in the figure.
      Fig 5: Identifying Tightening Sequence Of Main Bearing Cap Bolts
      G08456407Courtesy of NISSAN NORTH AMERICA, INC.

      Tightening torque 35.3N.m (3.6 Kg-m 26ft-lb) 

    3. Tighten the connecting rod bolt by 90 degrees. (Angular tightening)
    CAUTION: Use angle wrench [SST: KV10112100] (A) for angular tightening. Never judge by visual check.
    • After tightening bolts, check that the crankshaft rotates smoothly.
    • Check crankshaft side clearance. Refer to "INSPECTION "
      Fig 6: Checking Tightening Angle Using Angle Wrench
      G08456408Courtesy of NISSAN NORTH AMERICA, INC.
  8. Check the outside diameter of connecting rod bolt. Refer to "INSPECTION "
  9. Install piston to connecting rod as follows:
    1. Using a snap ring pliers, install new snap ring to the groove of piston rear side.
      • Insert it fully into groove to install.
    2. Install piston to connecting rod.
      • Using an industrial use drier or similar tool, heat piston until piston pin can be pushed in by hand without excess force [approximately 60 to 70°C (140 to 158°F)]. From the front to the rear, insert piston pin into piston and connecting rod.
      • Assemble so that the front mark on the piston head and the cylinder number on connecting rod are positioned as shown in the figure.
        Fig 7: Identifying Piston Grade Number, Front Mark, Pin Grade Number And Cylinder Number
        G08456409Courtesy 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.
  10. Using a piston ring expander (commercial service tool) (A), install piston rings.
    CAUTION:
    • When installing piston rings, be careful not to damage piston.
    • Never damage piston rings by expending them excessively.
    Fig 8: Removing Piston Rings From Piston Using Piston Ring Expander
    G08456410Courtesy of NISSAN NORTH AMERICA, INC.
    • If there is stamped mark on ring, mount it with marked side up.

      Stamped mark: 

      Top ring (A): R 

      Second ring (B): R 2 

      Fig 9: Identifying Stamped Mark On Top And Second Ring
      G08456411Courtesy of NISSAN NORTH AMERICA, INC.
    • Position each ring with the gap as shown in the figure referring to the piston front mark (D).
      Fig 10: Identifying Piston Rings With Gap
      G08456412Courtesy of NISSAN NORTH AMERICA, INC.
    • Check the piston ring side clearance. Refer to "CYLINDER BLOCK ".
  11. Install connecting rod bearings to connecting rod and connecting rod bearing cap.
    CAUTION: Never drop connecting rod bearing, and to scratch the surface.
    • Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply engine oil to the back surface, but thoroughly clean it.
    • When installing, align connecting rod bearing stopper protrusion (B) with cutout (C) of connecting rods and connecting rod bearing caps to install.
    • Ensure the oil hole (A) on connecting rod and that on the corresponding bearing are aligned.
      Fig 11: Identifying Oil Hole, Connecting Rod Bearing Stopper Protrusion And Cutout
      G08456413Courtesy of NISSAN NORTH AMERICA, INC.
  12. Install piston and connecting rod assembly to crankshaft.
    • Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
    • Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
    • Match the cylinder position with the cylinder number on connecting rod to install.
    • Be sure that front mark on piston crown is facing front of engine.
    • Using a piston ring compressor [SST: EM03470000] (A) or suitable tool, install piston with the front mark on the piston crown facing the front of the engine.
    CAUTION: Never damage the cylinder wall and crankshaft pin, resulting from an interference of the connecting rod big end.
    Fig 12: Installing Piston And Connecting Rod Assembly To Crankshaft
    G08456414Courtesy of NISSAN NORTH AMERICA, INC.
  13. Install connecting rod bearing cap.
    • Match the stamped cylinder number marks on connecting rod with those on connecting rod bearing cap to install.
      Fig 13: Identifying Identification Codes On Connecting Rod Bearing Cap
      G08456415Courtesy of NISSAN NORTH AMERICA, INC.
    • Be sure that front mark (H) on connecting rod bearing cap is facing front of the engine.
  14. Tighten connecting rod bolt as follows:
    1. Apply engine oil to the screw and the bearing surface of connecting rod.
    2. Tighten the connecting rod bolt to the specified torque.

      Tightening torque 19.6 N.m (1.9 Kg-m 14 ft-lb) 

    3. Tighten the connecting rod bolt by 90 degrees. (Angular tightening)
      CAUTION: Use angle wrench [SST: KV10112100] (A) for angular tightening. Never judge by visual check.
      • After tightening bolts, check that the crankshaft rotates smoothly.
      • Check the piston ring side clearance. Refer to "INSPECTION ".
        Fig 14: Measuring Connecting Rod Bolt Tightening Angle Using Angle Wrench
        G08456416Courtesy of NISSAN NORTH AMERICA, INC.
  15. Install rear oil seal retainer.
    • Apply liquid gasket (an equivalent of Three Bond 1218B) to the edge shown in the figure in a seamless single layer. Refer to "LIQUID GASKET "
      Fig 15: Identifying Liquid Gasket Applying Area On Rear Oil Seal Retainer
      G08456417Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Replace rear oil seal retainer with a new one.
      NOTE: Rear oil seal retainer and rear oil seal are assembled parts.
  16. Install pilot converter.
    • Press pilot converter into the cylinder block all the way to the end with a drift (general purpose tool) measuring approximately 33mm in outside diameter.
      NOTE: The figure shows pilot converter installation as an example.
      Fig 16: Pressing Pilot Converter Into Cylinder Block Using Drift
      G08456418Courtesy of NISSAN NORTH AMERICA, INC.
    • Press-fit pilot converter with its chamfer facing crankshaft as shown in the figure.
      Fig 17: Identifying Pilot Converter With Chamfer Facing Crankshaft
      G08456419Courtesy of NISSAN NORTH AMERICA, INC.
  17. Install drive plate as follows:
    • Install drive plate and reinforce plate (3) in the direction shown in the figure.
      Fig 18: Identifying Ring Gear, Drive Plate And Pilot Converter
      G08456420Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Ensure the correct side (front or back) to install.
    • To install drive plate and reinforce plate, align the dowel holes with the dowel pins on the rear end of crankshaft (5).
    • Fix crankshaft with the ring gear stopper [SST: KV10105620] to tighten the mounting bolt.
    • Tighten mounting bolts diagonally in several steps.
  18. Install knock sensors.
    Fig 19: Identifying Knock Sensor
    G08456421Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Always use genuine mounting bolts.
    • Never hold the connector when tightening the mounting bolts.
    • Check that the knock sensor does not interfere with other parts.
    • If the knock sensor is physically-impacted, replace it with a new one.
    • Check that the cylinder block mounting surface and the knock sensor rear face are free from foreign matter.
    • To install the connector, turn it toward the front of the vehicle.
    • After installing the knock sensor, connect the sub-harness and set aside its harness cable on the engine rear side.
  19. Install in the reverse order of disassembly after this step.
scientia non olet · About LEMON Manuals