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Home >> Infiniti >> 2012 >> EX35 Base, AWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical System >> Removal And Installation >> Timing Chain >> Removal and Installation >> Removal

Removal and Installation: Removal

  1. Release the fuel pressure. Refer to "INSPECTION ".
  2. Disconnect the battery cable from the negative terminal.
  3. Remove engine cover, using a power tool. Refer to "EXPLODED VIEW ".
  4. Remove radiator reservoir tank. Refer to "EXPLODED VIEW ".
  5. Remove air duct and air cleaner case assembly (RH and LH). Refer to "EXPLODED VIEW ".
  6. Remove engine undercover, using a power tool.
  7. Drain engine coolant from radiator. Refer to "DRAINING ".
    CAUTION:
    • Perform this step when the engine is cold.
    • Never spill engine coolant on drive belt.
  8. Remove radiator hose (upper and lower). Refer to "EXPLODED VIEW ".
  9. Drain engine oil. Refer to "DRAINING ".
    CAUTION:
    • Perform this step when the engine is cold.
    • Never spill engine oil on drive belt.
  10. Remove drive belt. Refer to "EXPLODED VIEW ".
  11. Remove radiator cooling fan assembly. Refer to "EXPLODED VIEW ".
  12. Separate engine harnesses removing their brackets from front timing chain case.
  13. Remove intake manifold collector. Refer to "EXPLODED VIEW ".
  14. Remove intake manifold. Refer to "EXPLODED VIEW ".
  15. Remove fuel sub tube mounting bolt. Refer to "EXPLODED VIEW ".
  16. Remove oil level gauge and oil level gauge guide.
  17. Remove A/C compressor from bracket with piping connected, and temporarily secure it aside. Refer to "EXPLODED VIEW ".
  18. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside. Refer to "EXPLODED VIEW ".
  19. Remove power steering oil pump bracket. Refer to "EXPLODED VIEW ".
  20. Remove idler pulley, auto tensioner and bracket. Refer to "EXPLODED VIEW ".
  21. Remove alternator and alternator bracket. Refer to "2WD: EXPLODED VIEW " (2WD models) or "AWD: EXPLODED VIEW " (AWD models).
  22. Remove water outlet (front) and water piping. Refer to "EXPLODED VIEW ".
  23. Remove valve timing control covers (bank 1 and bank 2) and gasket as follows:
    1. Disconnect valve timing control harness connector.
    2. Loosen mounting bolts in reverse order as shown in the figure.
      Fig 1: Identifying Timing Chain Mounting Bolts Tightening Order
      G08193294Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Shaft is internally jointed with camshaft sprocket (INT) center hole. When removing, keep it horizontal until it is completely disconnected.
    3. Shaft is engaged with intake side camshaft sprocket center hole on inside. pull straight out so as not to tilt until the joint is disengaged.
      • The mating surface of magnet retarder (2) may be fitted with the exhaust side camshaft sprocket via the engine oil. Open valve timing control cover (1) carefully
      • If the mating surface of magnet retarder is fitted with the camshaft sprocket, open the cover within the range that the load is not applied to the harness. And then, remove it so as to prevent magnet retarder from dropping.
      CAUTION:
      • Never damage magnet retarder.
      • When carrying valve timing control cover, face the magnet retarder side up to prevent the cover from falling from magnet retarder.
      • Never remove magnet retarder from valve timing control cover. (Disassembly prohibited parts)
      Fig 2: Identifying Timing Chain And Magnet Retarder
      G08193295Courtesy of NISSAN NORTH AMERICA, INC.
  24. Remove rocker covers (bank 1 and bank 2). Refer to "EXPLODED VIEW ".
  25. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
    1. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator.
      Fig 3: Identifying Crankshaft Pulley Timing Mark
      G08193296Courtesy of NISSAN NORTH AMERICA, INC.
    2. Check that intake and exhaust cam noses on No. 1 cylinder (engine front side of bank 1) are located as shown in the figure.
      Fig 4: Locating Intake And Exhaust Cam Noses
      G08193297Courtesy of NISSAN NORTH AMERICA, INC.
      • If not, turn crankshaft one revolution (360 degrees) and align as shown in the figure.
  26. Remove crankshaft pulley as follows:
    1. Remove front cross bar. Refer to "EXPLODED VIEW ". (AWD models)
    2. Remove power steering pipe mounting bolt. Refer to "2WD: EXPLODED VIEW ".
    3. Remove rear cover plate and set the ring gear stopper [SST: KV10118600 (J-48641)] (A) as shown in the figure.
      Fig 5: Removing Rear Cover Plate And Set Ring Gear Stopper Using Tool
      G08193298Courtesy of NISSAN NORTH AMERICA, INC.
    4. Loosen crankshaft pulley bolt and rotate bolt seating surface at 10 mm (0.39 in) from its original position.
      Fig 6: Loosening Crankshaft Pulley Bolt Using Tool
      G08193299Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Never remove crankshaft pulley bolt as it will be used as a supporting point for suitable puller.
    5. Place suitable puller tab on holes of crankshaft pulley, and pull crankshaft pulley through.
      CAUTION: Never put suitable puller tab on crankshaft pulley periphery, as this will damage internal damper.
      Fig 7: Pulling Crankshaft Pulley Using Pulley Puller
      G08193300Courtesy of NISSAN NORTH AMERICA, INC.
  27. Remove oil pan (lower). Refer to "EXPLODED VIEW (2WD) " (2WD models) or "EXPLODED VIEW (AWD) " (AWD models).
  28. Loosen two mounting bolts in front of oil pan (upper) with power tool in reverse order as shown in the figure.
    Fig 8: Identifying Oil Pan (Upper) Mounting Bolts Tightening Order
    G08193301Courtesy of NISSAN NORTH AMERICA, INC.
  29. Remove front timing chain case as follows:
    1. Loosen mounting bolts in reverse order as shown in the figure.
      Fig 9: Identifying Front Timing Chain Case Mounting Bolts Tightening Sequence
      G08193302Courtesy of NISSAN NORTH AMERICA, INC.
    2. Insert a suitable tool (A) into the notch at the top of front timing chain case as shown in the figure.
    3. Pry off case by moving the suitable tool as shown in the figure.
      • Use the seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.
      CAUTION:
      • Never use a screwdriver or something similar.
      • After removal, handle front timing chain case carefully so it does not tilt, cant, or warp under a load.
      Fig 10: Prying Off Case By Moving Suitable Tool
      G08193303Courtesy of NISSAN NORTH AMERICA, INC.
  30. Remove front oil seal from front timing chain case using a suitable tool.
    • Use a screwdriver for removal.
    CAUTION: Never damage front timing chain case.
    Fig 11: Removing Front Oil Seal From Front Timing Chain Case Using Screwdriver
    G08193304Courtesy of NISSAN NORTH AMERICA, INC.
  31. Remove O-rings (1) from rear timing chain case.
    Fig 12: Identifying Rear Timing Chain Case O-Rings
    G08193305Courtesy of NISSAN NORTH AMERICA, INC.
  32. Remove timing chain tensioner (primary) as follows:
    1. Remove lower mounting bolt (A).
    2. Loosen upper mounting bolt (B) slowly, and then turn timing chain tensioner (primary) (1) on the upper mounting bolt so that plunger (C) is fully expanded.
      NOTE: Even if plunger is fully expanded, it is not dropped from the body of timing chain tensioner (primary).
    3. Remove upper mounting bolt, and then remove timing chain tensioner (primary).
      Fig 13: Identifying Timing Chain Tensioner, Mounting Bolts And Plunger
      G08193306Courtesy of NISSAN NORTH AMERICA, INC.
  33. Remove internal chain guide (1), and slack guide (2).
    Fig 14: Identifying Chain Guide And Slack Guide
    G08193307Courtesy of NISSAN NORTH AMERICA, INC.
  34. Remove timing chain (primary) and crankshaft sprocket.
    CAUTION: After removing timing chain tensioner (primary), never turn crankshaft and camshaft separately, or valves will strike the piston heads.
  35. Remove timing chain (secondary) and camshaft sprockets as follows:
    1. Attach suitable stopper pin (2) to the timing chain tensioners (secondary) (1).
      Fig 15: Identifying Stopper Pin And Timing Chain Tensioners
      G08193308Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE:
      • Use approximately 0.5 mm (0.02 in) Dia. hard metal pin as a stopper pin.
      • For removal of timing chain tensioners (secondary), refer to "EXPLODED VIEW ". [Removing camshaft bracket (No. 1) is required.]
    2. Remove camshaft sprocket mounting bolts (INT and EXH).
      • Secure the hexagonal portion of camshaft using a wrench to loosen mounting bolts.
        CAUTION: Never loosen the mounting bolts with securing anything other than the camshaft hexagonal portion or with tensioning the timing chain.
        Fig 16: Loosening Camshaft Sprocket Bolts Using Wrench
        G08193309Courtesy of NISSAN NORTH AMERICA, INC.
    3. Remove timing chain (secondary) together with camshaft sprockets.
      CAUTION: Never disassemble. [Never loosen bolts (A) and (B) as shown in the figure.]
      Fig 17: Identifying Camshaft Sprockets Bolt
      G08193310Courtesy of NISSAN NORTH AMERICA, INC.
  36. Remove timing chain tensioners (secondary) from cylinder head as follows, if necessary.
    1. Remove camshaft brackets (No. 1). Refer to "EXPLODED VIEW ".
    2. Remove timing chain tensioners (secondary) with a stopper pin attached.
  37. Use a scraper to remove all traces of old liquid gasket from front and rear timing chain cases and oil pan (upper), and liquid gasket mating surfaces.
    CAUTION: Be careful not to allow gasket fragments to enter oil pan.
    Fig 18: Removing Liquid Gasket Using Scraper
    G08193311Courtesy of NISSAN NORTH AMERICA, INC.
  38. Remove old liquid gasket from bolt hole and thread.
    Fig 19: Removing Liquid Gasket From Bolt Hole And Thread
    G08193312Courtesy of NISSAN NORTH AMERICA, INC.
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