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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (5.6L) (Except Hybrid) >> Unit Disassembly And Assembly >> Timing Chain >> Disassembly and Assembly >> Disassembly

Disassembly and Assembly: Disassembly

  1. Remove auto tensioners and idler pulley. Refer to Exploded View .
  2. Remove oil level gauge and oil level gauge guide. Refer to Exploded View .
  3. Remove alternator bracket and alternator stay.
  4. Remove camshaft position sensors.
    GNSJPBIA0454Z-454Courtesy of NISSAN NORTH AMERICA, INC.

    A

    : Keep free from magnetic materials
    CAUTION:
    • Handle carefully to avoid dropping and shocks.
    • Never disassemble.
    • Never allow metal powder to cling to magnetic part at sensor tip.
    • Never place sensors in a location where they are exposed to magnetism.
  5. Remove high pressure fuel pump and lifter. Exploded View .
    CAUTION: After removing lifter, replace lifter with a new one.
  6. Remove water suction hose and water suction pipe. Refer to Exploded View .
  7. Remove valve timing control cover as per the following:
    1. Disconnect valve timing control solenoid valve harness connector.
    2. Loosen mounting bolts in the reverse order as shown in the figure, below.
      Fig 1: Valve Timing Control Cover Mounting Bolt Tightening Sequence
      GNSJSBIA0789Z-789Courtesy of NISSAN NORTH AMERICA, INC.

      A

      : Bank 2

      B

      : Bank 1

      C

      : Dowel pin hole
      CAUTION:
      • Exercise care not to damage mating surfaces.
      • Shaft is internally jointed with camshaft sprocket center hole. When removing, keep it horizontal until it is completely disconnected.
  8. Remove valve timing control solenoid valve (INT and EXH), if necessary.
    CAUTION: Valve timing control solenoid valve is not reusable. Never remove it unless required.
  9. Remove fuel pump connector protector. Refer to Exploded View .
  10. Remove O-rings (1) from front cover.
    GNSJPBIA3477Z-477Courtesy of NISSAN NORTH AMERICA, INC.
  11. Remove rocker cover. Refer to Exploded View .
  12. Obtain No. 1 cylinder at TDC of its compression stroke. Refer to Inspection .
  13. Remove oil cooler tube and hose. Refer to Exploded View .
  14. Remove air compressor bracket.
  15. Remove crankshaft pulley. Refer to Removal and Installation .
  16. Remove water pump pulley. Refer to Exploded View .
  17. Remove oil pan (lower) and oil strainer. Refer to Exploded View  (2WD models) or Exploded View  (AWD models).
  18. Remove oil pan (upper). Refer to Exploded View .
  19. Remove front cover as per the following:
    1. Loosen mounting bolts (A), and then remove camshaft bracket (1).
      GNSJPBIA3486Z-486Courtesy of NISSAN NORTH AMERICA, INC.
    2. Loosen mounting bolts in reverse order as shown in the figure, below.
      Fig 2: Front Cover Mounting Bolt Tightening Sequence
      GNSJPBIA4283Z-283Courtesy of NISSAN NORTH AMERICA, INC.
    3. Insert a suitable tool into the notch at front cover.
      • Pry off case by moving a suitable tool.
      CAUTION:
      • Exercise care not to damage mating surfaces.
      • After removal, handle front cover carefully so it does not tilt, cant, or warp under a load.
  20. Remove front oil seal from front cover using suitable tool.
    • Use screwdriver for removal.
    CAUTION: Be careful not to damage front cover.
  21. Remove O-rings (1), (2) from cylinder heads and cylinder block.
    GNSJPBIA4284Z-284Courtesy of NISSAN NORTH AMERICA, INC.
  22. Remove oil filter (for valve timing control solenoid valve), if necessary.
  23. Remove timing chain tensioner cover from front cover, if necessary.
    • Use seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.
  24. Remove oil pump drive chain as per the following:
    1. Push oil pump drive chain tensioner (1).
      GNSJPBIA2303Z-303Courtesy of NISSAN NORTH AMERICA, INC.
    2. Insert a stopper pin (A) into the body hole.
    3. Hold the two flat parts of oil pump shaft, and then loosen the oil pump sprocket (oil pump side) nut.
      GNSJPBIA2298Z-298Courtesy of NISSAN NORTH AMERICA, INC.

      1

      : Oil pump sprocket (oil pump side)
      CAUTION: Secure the oil pump unit shaft with the two flat parts.
  25. Remove oil pump drive chain tensioner.
  26. Remove timing chain tensioner (bank 1) as per the following:
    NOTE: To remove timing chain and related parts, start with those on bank 1. The procedure for removing parts on bank 2 is omitted because it is the same as that for bank 1.
    1. Push both sides of spring (A) against spring tension, and then press in plunger with a slack guide (2).
      GNSJPBIA2369Z-369Courtesy of NISSAN NORTH AMERICA, INC.

      1

      : Timing chain tensioner (bank 1)
    2. Insert a stopper pin (A) into the body hole, and then fix it with the plunger pushed in.
      GNSJPBIA2370Z-370Courtesy of NISSAN NORTH AMERICA, INC.
  27. Remove high pressure fuel pump camshaft.
  28. Remove tension guide and slack guide.
  29. Remove timing chain and crankshaft sprocket.
    CAUTION: After removing timing chain, never turn crankshaft and camshaft separately, or valves will strike the piston head.
  30. Remove intake and exhaust camshaft sprocket as per the following:
    • Secure the hexagonal portion (located in between journal No. 1 and journal No. 2) of drive shaft (A) using a wrench (B) to loosen mounting bolt. Refer to Exploded View .
      GNSJPBIA2302Z-302Courtesy of NISSAN NORTH AMERICA, INC.

      SYMBOL

      : Engine front
      NOTE: The figure shows an example of bank 2.
    31. CAUTION:
    • Never loosen the mounting bolt by securing anything other than the camshaft (drive shaft) hexagonal portion or with tensioning the timing chain.
    • When holding the hexagonal part of camshaft (drive shaft) with a wrench, be careful not to allow the wrench to cause interference with other parts.
    • Never disassemble camshaft sprocket. [NEVER loosen bolts (C) as shown in the figure, below.]
      GNSJSBIA0790Z-790Courtesy of NISSAN NORTH AMERICA, INC.

      A

      : Intake

      B

      : Exhaust
  32. Use scraper to remove all traces of old liquid gasket from front cover and opposite mating surfaces.
    • Remove old liquid gasket from bolt hole and thread.
      GNSJPBIA0051Z-051Courtesy of NISSAN NORTH AMERICA, INC.

      A

      : Remove old liquid gasket that is stuck

      B

      : Bolt hole
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