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Home › Infiniti › 2012 › FX50 › Repair and Diagnosis › External Pages › Different car › Section 145 (Engine Mechanical) › Unit Disassembly And Assembly › Timing Chain › Disassembly and Assembly › Disassembly

Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2011 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  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.
    CAUTION:
    • Handle carefully to avoid dropping and shocks.
    • Never disassemble.
    • Never allow metal powder to adhere to magnetic part at sensor tip.
    • Never place sensors in a location where they are exposed to magnetism.
      Fig 1: Identifying Camshaft Position Sensor
      G07226085Courtesy of NISSAN MOTOR CO., U.S.A.
  5. 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 illustration.
      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.
        Fig 2: Identifying Valve Timing Control Cover Bolts Tightening Sequence
        G07226086Courtesy of NISSAN MOTOR CO., U.S.A.
  6. 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.
  7. Remove O-rings (1) from front cover.
    Fig 3: Identifying O-Rings On Front Cover
    G07226087Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove rocker cover. Refer to "EXPLODED VIEW ".
  9. Obtain No. 1 cylinder at TDC of its compression stroke. Refer to "INSPECTION ".
  10. Remove crankshaft pulley. Refer to "FRONT OIL SEAL : REMOVAL AND INSTALLATION ".
  11. Remove water pump pulley. Refer to "EXPLODED VIEW ".
  12. Remove oil pan (lower) and oil strainer. Refer to "EXPLODED VIEW ".
  13. Remove oil pan (upper). Refer to "EXPLODED VIEW ".
  14. Remove front cover as per the following:
    1. Loosen mounting bolts in reverse order as shown in the illustration.
    2. 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.
          Fig 4: Identifying Front Cover Bolts Tightening Sequence
          G07226088Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove front oil seal from front cover using suitable tool.
    • Use screwdriver for removal.
      CAUTION: Be careful not to damage front cover.
  16. Remove O-rings (1), (2) from cylinder heads and cylinder block.
    Fig 5: Identifying O-Rings Of Cylinder Heads And Cylinder Block
    G07226089Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Remove oil filter (for valve timing control solenoid valve), if necessary.
  18. Remove timing chain tensioner cover from front cover, if necessary.
    • Use seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.
  19. Remove oil pump drive chain as per the following:
    1. Push oil pump drive chain tensioner (1).
    2. Insert a stopper pin (A) into the body hole.
      Fig 6: Removing Oil Pump Drive Chain
      G07226090Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Hold the two flat parts of oil pump shaft, and then loosen the oil pump sprocket (oil pump side) nut.
      CAUTION: Secure the oil pump unit shaft with the two flat parts.
      Fig 7: Loosening Oil Pump Sprocket (Oil Pump Side) Nut
      G07226091Courtesy of NISSAN MOTOR CO., U.S.A.
  20. Remove oil pump drive chain tensioner.
  21. 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).
      Fig 8: Pushing Both Sides Of Spring Against Spring Tension
      G07226092Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Insert a stopper pin (A) into the body hole, and then fix it with the plunger pushed in.
      Fig 9: Inserting Stopper Pin Into Body Hole
      G07226093Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove tension guide and slack guide.
  23. Remove timing chain and crankshaft sprocket.
    CAUTION: After removing timing chain, never turn crankshaft and camshaft separately, or valves will strike the piston head.
  24. Remove camshaft sprocket (INT) and (EXH) as per the following:

    Exhaust side:

    • Secure the hexagonal portion of camshaft (EXH) using a wrench to loosen mounting bolt. Refer to "EXPLODED VIEW ".

    Intake side:

    • 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 ".
    NOTE: The figure shows an example of bank 2.
    Fig 10: Securing Hexagonal Portion (Located In Between Journal No. 1 And Journal No. 2) Of Drive Shaft Using Wrench To Loosen Mounting Bolt
    G07226094Courtesy of NISSAN MOTOR CO., U.S.A.
    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), (D) as shown in the illustration.]
      Fig 11: Identifying Camshaft Sprocket And Bolts
      G07226095Courtesy of NISSAN MOTOR CO., U.S.A.
  25. 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.
      Fig 12: Identifying Old Liquid Gasket In Bolt Hole And Thread
      G07226096Courtesy of NISSAN MOTOR CO., U.S.A.
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