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Home >> Nissan-Datsun >> 2008 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical (Qr25DE)) >> Timing Chain >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Support the engine and transaxle assembly with suitable tools.
  2. Remove RH splash shield.
  3. Remove the upper and lower oil pan, and oil strainer. Refer to "REMOVAL AND INSTALLATION ".
  4. Remove generator. Refer to "REMOVAL ".
  5. Remove engine cover.
  6. Disconnect variable timing control solenoid harness connector.
  7. Remove engine ground.
  8. Remove the coolant overflow reservoir tank.
  9. Position the RH engine compartment fuse and relay box aside.
  10. Remove the RH engine mount and bracket. Refer to "REMOVAL AND INSTALLATION ".
  11. Loosen bolts in the numerical order as shown.
    Fig 1: IVT Control Cover Bolt With Loosening Sequence
    G04924786Courtesy of NISSAN MOTOR CO., U.S.A.

    Remove the IVT (intake valve timing) control cover using Tool.

    Tool number : KV10111100 (J-37228) 

    Fig 2: Removing IVT (Intake Valve Timing) Control Cover
    G04885713Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Pull chain guide between camshaft sprockets out through front cover.
  13. Set the No.1 cylinder at TDC on the compression stroke with the following procedure:
    1. Rotate the crankshaft pulley clockwise and align the mating marks to the timing indicator on the front cover.
      Fig 3: Aligning Crankshaft Pulley Mating Marks To Timing Indicator On Front Cover
      G04885688Courtesy of NISSAN MOTOR CO., U.S.A.
    2. At the same time, make sure that the mating marks on the camshaft sprockets are lined up as shown.
      • If not lined up, rotate the crankshaft pulley one more turn to line up the mating marks to the positions as shown.
        Fig 4: Aligning Mating Marks Of Camshaft Sprockets With Timing Chain Yellow Links
        G04885733Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove crankshaft pulley with the following procedure:
    1. Hold the crankshaft pulley using suitable tool, then loosen the crankshaft pulley bolt, and pull the pulley out about 10 mm (0.39 in).
      Fig 5: Locating Crankshaft Pulley Mounting Bolt And Suitable Tool
      G04885770Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Attach suitable pulley puller in the M 6 (0.24 in diameter) thread hole on crankshaft pulley, and remove crankshaft pulley using a suitable puller.
      Fig 6: Attaching Pulley Puller In Thread Hole On Crankshaft Pulley
      G04885771Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove the front cover with the following procedure:
    1. Loosen the bolts in the reverse order as shown, and remove them.
      2. Fig 7: Front Cover Bolts (With Tightening Sequence)
      G04924828Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove the front cover.
      CAUTION:
      • Be careful not to damage the mounting surface.
  16. If the front oil seal needs to be replaced, lift it out with a screwdriver to remove it.
  17. Remove timing chain with the following procedure:
    1. Push in the tensioner plunger. Insert a stopper pin into the hole on the tensioner body to hold the chain tensioner.
      • Use a wire of 0.5 mm (0.02 in) diameter as a stopper pin.
    2. Remove the chain tensioner.
      Fig 8: Inserting Stopper Pin Into Hole On Tensioner Body
      G04885735Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Secure hexagonal part of the camshaft with a wrench and loosen the camshaft sprocket bolt and remove the camshaft sprocket for both camshafts.
      CAUTION:
      • Do not rotate the crankshaft or camshafts while the timing chain is removed. It can cause damage to the valve and piston.
        Fig 9: Locating Camshaft Sprocket Bolt
        G04885734Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Remove the chain slack guide, tension guide, timing chain, and oil pump drive spacer.
  19. Remove the timing chain tensioner for the balancer unit with the following procedure:
    1. Lift the tensioner lever up, and release the ratchet claw for installation.
    2. Push tensioner sleeve in, and hold it.
    3. Matching the hole on lever with the one on body, insert a stopper pin to secure tensioner sleeve.
    4. Remove the timing chain tensioner for the balancer unit.
  20. Remove timing chain for balancer unit and crankshaft sprocket.
    Fig 10: Identifying Balancer Unit And Crankshaft Sprocket Timing Chain
    G00465442Courtesy of NISSAN MOTOR CO., U.S.A.
  21. Loosen bolts in reverse order as shown, and remove balancer unit.
    • Use Torx socket (size E14)
    CAUTION:
    • Do not disassemble balancer unit.
      Fig 11: Balancer Unit Bolt (With Tightening Sequence)
      G04924832Courtesy of NISSAN MOTOR CO., U.S.A.
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