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Home >> Nissan-Datsun >> 2011 >> Sentra S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical (Qr25DE)) >> Service Information >> Timing Chain >> Removal and Installation >> Installation

Removal and Installation: Installation

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • There may be two color variations of the link marks (link colors) on the timing chain.
  • There are 26 links between the gold/yellow mating marks on the timing chain; and 64 links between the camshaft sprocket gold/yellow link and the crankshaft sprocket orange/blue link, on the timing chain side without the tensioner.
  1. Make sure the crankshaft key points straight up.
  2. Install the balancer unit and tighten the bolts in the numerical order as shown in the figure, if removed:
    • <==: Front
    CAUTION:
    • When reusing a bolt, check its outer diameter before installation. Follow the "Balancer Unit Bolt Outer Diameter" procedure.

    Tool number (A) : KV10112100 (BT-8653-A) 

    Fig 1: Installing Balancer Unit
    G07137508Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • Check tightening angle with an angle wrench (A) or a protractor. Do not make judgment by visual check alone.
    • Apply new engine oil to threads and seating surfaces of bolts.

    Balancer unit bolts 

    Step 1 

    Bolts 1-5 : 42 N.m (4.3 kg-m, 31 ft-lb) 

    Bolt 6 : 36 N.m (3.7 kg-m, 27 ft-lb) 

    Step 2 

    Bolts 1-5 : 120° + 5° 

    Bolt 6 : 90° + 5° 

    Fig 2: Checking Attaching Angle With Angle Wrench
    G07137509Courtesy of NISSAN MOTOR CO., U.S.A.

    Step 3 (Loosen in reverse order or tightening) : 0 N.m (0 kg-m, 0 ft-lb) 

    Step 4 

    Bolts 1-5 : 42 N.m (4.3 kg-m, 31 ft-lb) 

    Bolt 6 : 36 N.m (3.7 kg-m, 27 ft-lb) 

    Step 5 

    Bolts 1-5 : 120° + 5° 

    Bolt 6 : 90° + 5° 

  3. Install the crankshaft sprocket and timing chain for the balancer unit.
    • Make sure that the crankshaft sprocket is positioned with mating marks on the block and sprocket meeting at the top.
    • Install it by lining up mating marks on each sprocket and timing chain.
      Fig 3: Installing Crankshaft Sprocket And Timing Chain For Balancer Unit
      G07137510Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Install timing chain tensioner (for balancer unit) (1).
    1. Fix the plunger at the most compressed position using a stopper pin (A), and then install it.
    2. Securely pull out <== the stopper pin after installing the timing chain tensioner (for balancer unit).
    3. Check matching mark position of balancer unit timing chain and each sprocket again.
      Fig 4: Installing Timing Chain Tensioner (For Balancer Unit)
      G07137511Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install timing chain and related parts.
    • Install by lining up mating marks on each sprocket and timing chain as shown in the figure.
      CAUTION: After the mating marks are aligned, keep them aligned by holding them with a hand.
      NOTE: Before installing chain tensioner, it is possible to change the position of mating mark on timing chain for that of each sprocket for alignment.
    • Before and after installing chain tensioner, check again to make sure that mating marks have not slipped.
    • After installing chain tensioner, remove stopper pin, and make sure the tensioner moves freely.
    • To avoid skipped teeth, do not move crankshaft and camshaft until front cover is installed.
      Fig 5: Installing By Lining Up Mating Marks On Each Sprocket And Timing Chain
      G07137512Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Install new front oil seal to front cover, using suitable tool
    • Install new oil seal in until it is flush with front end surface of front cover.
      CAUTION:
      • Be careful not to cause damage to circumference of oil seal.
        Fig 6: Installing New Front Oil Seal To Front Cover, Using Suitable Tool
        G07137513Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Install front cover with the following procedure:
    1. Install O-rings to cylinder head and cylinder block.
    2. Apply Genuine Silicone RTV Sealant or equivalent, to positions specified (A), (B). Refer to "RECOMMENDED CHEMICAL PRODUCT AND SEALANT ".

      C (Sealant dimension) : 3.9 mm (0.154 in) dia 

      Fig 7: Installing Front Cover
      G07137514Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Make sure the mating marks on the timing chain and each sprocket are still aligned. Then install the front cover.
      CAUTION:
      • Be careful not to damage the front oil seal during installation with the front end of the crankshaft.
    4. Tighten front cover bolts in the numerical order as shown in the figure.
    5. After all bolts are tightened, retighten them to the specified torque.

      Front cover bolt torque 

      Bolts A : 49 N.m (5.0 kg-m, 36 ft-lb) 

      Bolts B : 12.7 N.m (1.3 kg-m, 9 ft-lb) 

      Bolts C : 12.7 N.m (1.3 kg-m, 9 ft-lb) 

      Bolts D : 49 N.m (5.0 kg-m, 36 ft-lb) 

      E Dowel pins 

      Fig 8: Front Timing Cover Bolt Tightening Sequence
      G07137515Courtesy of NISSAN MOTOR CO., U.S.A.
      CAUTION: Wipe off any excess sealant leaking at the surface for installing the oil pan.
  8. Install the chain guide between the camshaft sprockets.
  9. Install IVT cover with the following procedure:
    1. Install IVT solenoid valves to IVT cover.
    2. Install new oil rings to the intake camshaft sprocket insertion points on IVT control cover backside.
    3. Install new O-ring to front cover.
    4. Apply Silicone RTV Sealant to the IVT cover as shown in the figure.
      • Apply Genuine Silicone RTV Sealant (A) or equivalent, to positions specified. Refer to "RECOMMENDED CHEMICAL PRODUCT AND SEALANT ".
        Fig 9: Applying Genuine Silicone RTV Sealant
        G07137516Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Tighten the IVT cover bolts in the numerical order as shown in the figure.
      Fig 10: IVT Control Cover Bolt Tightening Sequence
      G07137517Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Insert crankshaft pulley by aligning with crankshaft key.
    • Tap its center with a plastic hammer to insert.
    • Do not tap the belt hook.
  11. Tighten crankshaft pulley bolts.
    • Secure crankshaft pulley with a pulley holder to tighten the bolt.
    • Perform angle tightening with the following procedure:
    1. Apply new engine oil to threads and seat surfaces of bolts.
    2. Tighten to initial specifications:

      Crankshaft pulley bolt initial tightening : 37.3 - 47.1 N.m (3.8 - 4.8 kg-m, 28 - 34 ft-lb) 

    3. Apply a paint mark on the front cover, mating with any one of six easy to recognize stamp marks on bolt flange.
    4. Turn crankshaft pulley bolt another 60° to 66° degrees [Target: 60° degrees].
      • Check vertical mounting angle with movement of one stamp mark.
  12. Installation of the remaining components is in reverse order of removal.
    Fig 11: Applying Paint Mark On Front Cover
    G07137518Courtesy of NISSAN MOTOR CO., U.S.A.