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Home >> Nissan-Datsun >> 2005 >> Sentra SE-R >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical (Qr25DE) >> Camshaft >> Removal and Installation >> Removal

Removal and Installation: Removal

  1. Remove the rocker cover. Refer to REMOVAL AND INSTALLATION .
  2. Remove the front right side tire and wheel. Refer to REMOVAL .
  3. Remove the RH splash shield.
  4. Remove the drive belt. Refer to REMOVAL .
  5. Remove the coolant overflow reservoir tank.
  6. Disconnect and remove the camshaft position sensor (PHASE).
  7. Disconnect the IVT control solenoid electrical connector.
  8. Disconnect the ground electrical connections from the front cover.
  9. Remove IVT control cover bolts in the order shown.
  10. Remove the IVT control cover by cutting the sealant using Tool.
    1. Tool number: KV10111100 (J-37228) 
    Fig 1: Identifying Intake Valve Timing Control Cover (With Loosening Sequence)
    G02453962Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Set the No.1 cylinder at TDC on its compression stroke with the following procedure:
    1. Open the access cover on RH undercover.
    2. Rotate crankshaft pulley clockwise, and align mating marks for TDC with timing indicator on front cover, as shown.
      Fig 2: Aligning Mating Marks TDC With Timing Indicator On Front Cover
      G02453963Courtesy of NISSAN MOTOR CO., U.S.A.
    3. At the same time, make sure that the mating marks on camshaft sprockets are lined up with the yellow links in the timing chain, as shown.
      • If not, rotate crankshaft pulley one more turn to line up the mating marks to the yellow links, as shown.
    Fig 3: Aligning Mating Marks On Camshaft Sprockets With Yellow Links In Timing Chain
    G02453964Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Pull the timing chain guide out between the camshaft sprockets through front cover.
  13. Remove camshaft sprockets as follows:
    CAUTION: Do not rotate the crankshaft or camshaft while the timing chain is removed. It causes interference between valve and piston.
    NOTE: Chain tension holding work is not necessary. Crankshaft sprocket and timing chain do not disconnect structurally while front cover is attached.
    1. Line up the mating marks on camshaft sprockets with the yellow links in the timing chain, and paint an indelible mating mark on the sprocket and timing chain link plate.
      Fig 4: Removing Camshaft Sprockets
      G02453965Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Push in the tensioner plunger and hold. Insert a stopper pin into the hole on tensioner body to hold the chain tensioner. Remove the timing chain tensioner.
      • Use a wire with 0.5 mm (0.02 in) diameter for a stopper pin.
    3. Secure the hexagonal part of camshaft with a suitable tool. Loosen the camshaft sprocket bolts and remove the camshaft sprockets.
    Fig 5: Inserting Stopper Pin Into Hole On Tensioner Body
    G02453966Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Loosen the camshaft bracket bolts in the order shown, and remove the camshaft brackets and camshafts.
    • Remove No.1 camshaft bracket by slightly tapping it with a rubber mallet.
    • Note mounting positions, and set them aside in the order removed.
  15. Remove the valve lifters.
    • Note mounting positions, and set them aside in the order removed.
    Fig 6: Identifying Loosening Sequence Of Camshaft Bracket Bolts
    G02453967Courtesy of NISSAN MOTOR CO., U.S.A.
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