LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2003 >> Q45 >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Engine Mechanical) >> Cylinder Block >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Fully air-blow engine coolant and engine oil passages in cylinder block, the cylinder bore, and crankcase to remove any foreign material.
    CAUTION: Use a goggles to protect your eye.
  2. Install each plug to cylinder block. (Only screwed-type plugs are shown in the figure.)
    Fig 1: Locating Cylinder Block Coolant Plugs
    G00753306Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Cylinder Block Coolant Plug Torque Specifications
    G00753307Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Install main bearings and thrust bearings.
    1. Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and main bearing caps.
    2. Install thrust bearings to the both sides of the No. 3 journal housing on cylinder block and main bearing caps
      • Install thrust bearings with the engine oil groove facing crankshaft arm (outside).
      • Install thrust bearings with a protrusion in the center on main bearing caps.
      Fig 3: Inspecting Thrust Bearing
      G00753308Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Install main bearings paying attention to the direction.
      • Install the one with oil holes onto cylinder block and the one without oil holes onto main bearing cap.
      • Before installing 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 the bearing stopper to the notch.
      • Insure the oil holes on cylinder block and those on the corresponding bearing are aligned.
    Fig 4: Identifying Main Bearings
    G00753309Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Install pilot converter to crankshaft.
    • Using a drift approximately 35 mm (1.38 in) in outer diameter, drive pilot converter until its front end contacts crankshaft.
    • Press fit pilot converter with its chamfered side facing crankshaft. (Refer to "Component parts illustration on former page".)
    • It is acceptable to install it without the engine stand.
    Fig 5: Installing pilot converter
    G00753310Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install crankshaft to cylinder block.
    • While turning crankshaft by hand, check that it turns smoothly.
  6. Install main bearing caps.
    • Align the identification number to the journal position to install.
    • Install the upper side of the identification number facing the front of engine. (The number shall be read correctly from the rear of engine.)
    • Using a plastic hammer or similar tool, tap them lightly to seat them on the installation position.
    Fig 6: Identifying Main Cap Placement
    G00753311Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Follow the below steps to tighten each main bearing cap bolts.
    1. Apply engine oil to threads and seating surface of bolts, and tighten all bolts temporarily.
    2. Tighten main bearing cap bolt (M12) to 36.3 to 42.1 N.m (3.7 to 4.3 kg-m, 27 to 31 ft-lb) in order of 1 to 10.
    3. Tighten main bearing cap sub bolt (M9) to 26.5 to 32.3 N.m (2.7 to 3.3 kg-m, 20 to 23 ft-lb) in order of 11 to 20.
      Fig 7: Main Cap Torque Sequence
      G00753312Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Tighten main bearing cap bolt (M12) to 40 degrees in order of 1 to 10. (angle tightening)
      CAUTION: Measure tighten angle in step "d" and "e" with the angle wrench (SST). Do not measure visually.
    5. Tighten main bearing cap sub bolt (M9) to 30 degrees in order of 11 to 20. (angle tightening)
    6. Tighten side bolt (M10) to 46.1 to 51.9 N.m (4.7 to 5.3 kg-m, 34 to 38 ft-lb) in order of 21 to 30.
      Fig 8: View Of angle wrench
      G00753313Courtesy of NISSAN MOTOR CO., U.S.A.
    7. Install cover of cylinder block right rear side (next to starter motor housing).
      • Rotate crankshaft by hands after bolts are tightened. Check if it rotates smoothly.
      • Check the crankshaft end play. Refer to CRANKSHAFT END PLAY  .
  8. Install rear oil seal using the rear oil seal drift (commercial service tool).
    • Tap until flattened with front edge of rear oil seal retainer. Do not damage or scratch outer circumference of oil seal.
    • Install new rear oil seal in the direction shown in the figure.
    Fig 9: Installing rear oil seal
    G00753315Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Install rear oil seal retainer.
    • Apply liquid gasket thoroughly to rear oil seal retainer.

      Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .

    • Apply new engine oil on lips of oil seal. Do not touch.
    Fig 10: Applying liquid gasket
    G00753316Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Install piston to connecting rod.
    1. Using the snap ring pliers, install snap ring to the grooves of the piston rear side.
      • Insert it fully into groove to install.
    2. Install piston to connecting rod.
      • Using the industrial use drier or equivalent, heat the piston until piston pin can be pushed in by hand without excess force [approx. 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 crown and the oil holes and the cylinder No. on connecting rod are positioned as shown in the figure.
    3. Install snap rings to the front of piston.
      • After installing, check that connecting rod moves smoothly.
    Fig 11: Piston And Connecting Rod Assembly
    G00753317Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Using the piston ring expander (commercial service tool), install piston rings.
    CAUTION: Be careful not to damage the piston.
    • Position each ring with the gap as shown in the figure, referring to the piston front mark.
    • Install top ring and second ring with the stamped surface facing upward.
      1. Stamped mark : R (top ring) 
      2. : 2R (second ring) 
    Fig 12: Piston Ring Placement
    G00753318Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Install connecting rod bearings to connecting rod and connecting rod cap.
    • When 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 the connecting rod bearing stopper protrusion with the cutout of connecting rod to install.
    • Check the oil holes on connecting rod and those on the corresponding bearing are aligned.
    Fig 13: Installing Connecting Rod Bearings
    G00753319Courtesy of NISSAN MOTOR CO., U.S.A.
  13. 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.
    • Match the cylinder position with the cylinder No. on connecting rod to install.
    • Using the piston ring compressor [SST: EM03470000 (J8037)], install piston with the front mark on the piston crown facing the front of engine.
      Fig 14: Installing Piston And Connecting Rod Assembly
      G00753320Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Be careful not to damage the crankshaft pin, resulting from an interference of connecting rod big end.
  14. Install connecting rod cap.
    • Match the stamped cylinder number marks on connecting rod with those on connecting rod cap to install.
    Fig 15: Installing connecting rod cap
    G00753321Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Tighten the connecting rod nuts as follows:
    1. Apply engine oil to the threads and seats of the connecting rod bolts and nuts.
    2. Tighten nuts to 13.7 to 15.7 N.m (1.4 to 1.6 kg-m, 10 to 12 ft-lb).
    3. Put mating (with paint) on each nut and connecting rod cap, all in the same direction (when using a protractor).
    4. Then all nuts 60 degrees clockwise (angle tightening).
      CAUTION: Always use either the angle wrench (SST) or protractor. Avoid tightening based on visual check alone.
      Fig 16: Using Angle Wrench
      G00753322Courtesy of NISSAN MOTOR CO., U.S.A.
      • After tightening the nuts, make sure that crankshaft rotates smoothly.
      • Check the connecting rod side clearance. Refer to CONNECTING ROD SIDE CLEARANCE .
  16. Install knock sensor.
    • Make sure that there is no foreign material on the cylinder block mating surface and the back surface of knock sensor.
    • Install it with its connector facing the rear side.
    • Do not tighten the mounting bolts while holding the connector.
    • Make sure that knock sensor does not interfere with other-parts.
    • Install knock sensor sub-harness with its shorter branch line to the right bank.
    CAUTION: If any impact by dropping is applied to knock sensor, replace it with new one.
    Fig 17: Installing Knock Sensor
    G00753323Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Install followings in the reverse order of removal.
  18. Remove engine assembly from engine stand.
  19. Install drive plate.
    • Align guide pin of crankshaft rear end with pin holes of each parts to install.
      Fig 18: Install Drive Plate
      G00753324Courtesy of NISSAN MOTOR CO., U.S.A.
    • Install drive plate, reinforcement plate and pilot converter (if not installed in step 4) as shown in the figure.
    • Using drift of 33 mm (1.30 in) dia, push pilot converter into the end.
    • Face pilot converter chamfered or rounded edge side to crankshaft.
    Fig 19: Drive Plate, reinforcement plate and pilot converter Assembly
    G00753325Courtesy of NISSAN MOTOR CO., U.S.A.
scientia non olet · About LEMON Manuals