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Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2010 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.
    Fig 1: Identifying Camshaft Position Sensors
    G05980102Courtesy of NISSAN MOTOR CO., U.S.A.
    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.
  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 below.
      Fig 2: Identifying Timing Control Cover Mounting Bolts Loosening Sequence
      G05980103Courtesy of NISSAN MOTOR CO., U.S.A.
      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.
  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
    G05980104Courtesy 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 below.
    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 Timing Cover Mounting Bolts Loosening Sequence
      G05980105Courtesy 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 Cylinder Head O-Ring
    G05980106Courtesy 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: Inserting Stopper Pin Into Body Hole
      G05980107Courtesy 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.
    Fig 7: Loosening Oil Pump Sprocket
    G05980108Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Secure the oil pump unit shaft with the two flat parts.
  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: Identifying Spring And Slack Guide
      G05980109Courtesy 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: Identifying Stopper Pin Into Body Hole
    G05980110Courtesy 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 .
    Fig 10: Loosening Drive Shaft Mounting Bolt
    G05980111Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE: The graphic shows an example of bank 2.
    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 below.]
    Fig 11: Identifying Camshaft Bolts
    G05980112Courtesy 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 Bolt Hole And Thread
    G05980113Courtesy of NISSAN MOTOR CO., U.S.A.

    ASSEMBLY

    Fig 13: Timing Chain Operation
    G05980114Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE:
    • The above graphic shows the relationship between the matching mark on each timing chain and that on the corresponding sprocket, with the components installed.
    • Parts with an identification mark (R or L) should be installed on the corresponding bank according to the mark.
      • Camshaft sprocket (INT), camshaft sprocket (EXH)
      • Tension guide
      • Slack guide
    • To install timing chain and related parts, start with those on bank 2. The procedure for installing parts on bank 1 is omitted because it is the same as that for installation on bank 2.
    • There is no matching mark in the oil pump related parts.
  1. Check that crankshaft key (1) and dowel pin (A) of each camshaft are located as shown below.

    Camshaft dowel pin: At cylinder head upper face side in each bank 

    Crankshaft key: Straight up 

    NOTE: Though camshaft does not stop at the position as shown below, for the placement of cam nose, it is generally accepted camshaft is placed for the same direction of the graphic.
    Fig 14: Identifying Crankshaft Key And Dowel Pin
    G05980115Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Install camshaft sprockets (INT and EXH).
    • Install onto correct side by checking with identification mark (A) on surface.
    Fig 15: Identifying Camshaft Sprockets Identification Mark
    G05980116Courtesy of NISSAN MOTOR CO., U.S.A.

    Exhaust side:

    • Secure the hexagonal portion of camshaft (EXH) using a wrench to tighten 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 tighten mounting bolt. Refer to EXPLODED VIEW .
    Fig 16: Tightening Drive Shaft Mounting Bolts
    G05980117Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE: The graphic shows an example of bank 2.
  3. Install timing chains as per the following:
    1. Install crankshaft sprockets for both banks.
      • Install each crankshaft sprocket so that its flange side (the larger diameter side without teeth) (A) faces in the direction shown below.
      Fig 17: Identifying Crankshaft Sprocket
      G05980118Courtesy of NISSAN MOTOR CO., U.S.A.
      NOTE: The same parts are used but facing directions are different.
    2. Install timing chains.

    Bank 2 (F):

    • Install timing chain so that the matching mark (outer groove) (B) on camshaft sprocket is aligned with the copper link (A) on timing chain, while the matching mark (punched) (C) on crankshaft sprocket is aligned with the yellow link (D) one on timing chain, as shown below.

    Bank 1 (G):

    • Install timing chain so that the matching mark (outer groove) (B) on camshaft sprocket is aligned with the copper link (A) on timing chain, while the matching mark (notched) (E) on crankshaft sprocket is aligned with the yellow link (D) one on timing chain, as shown below.
    Fig 18: Identifying Timing Chain
    G05980119Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Install slack guides and tension guides onto correct side by checking with identification mark (A) on surface.
    Fig 19: Identifying Slack Guides And Tension Guides
    G05980120Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Never overtighten slack guide mounting bolt (2). It is normal for a gap (A) to exist under the bolt seats when mounting bolt are tightened to the specification.
    Fig 20: Identifying Slack Guide Mounting Bolt
    G05980121Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install timing chain tensioner as per the following:
    1. Fix the plunger at the most compressed position using a stopper pin (A).
      • Remove any dirt and foreign materials completely from the back and the mounting surfaces of timing chain tensioner.
    2. Pull out stopper pin after installing, and then release plunger.
    Fig 21: Identifying Stopper Pin
    G05980110Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Check again that the matching marks on sprockets and timing chain have not slipped out of alignment.
  7. Install oil pump drive chain as per the following:
    1. Install oil pump drive chain tensioner.
      • Fix the tensioner at the most compressed position using a stopper pin. and then install it.
    2. Install the oil pump sprocket (crankshaft side), oil pump sprocket (oil pump side) and oil pump drive chain at the same time.
      • Install each oil pump sprocket so that its flange side (the larger diameter side without teeth) (A) faces in the direction shown below.
      Fig 22: Identifying Oil Pump Sprocket, Oil Pump And Crankshaft
      G05980123Courtesy of NISSAN MOTOR CO., U.S.A.
      NOTE: There is no matching mark in the oil pump related parts.
    3. Hold the two flat parts of oil pump shaft, and then tighten the oil pump sprocket (oil pump side) nut.
      Fig 23: Tightening Oil Pump Sprocket
      G05980124Courtesy of NISSAN MOTOR CO., U.S.A.
      CAUTION: Secure the oil pump shaft with the two flat parts.
    4. Securely pull out the stopper pin (A) after installing the oil pump drive chain.
      • Check that the tension is applied to the oil pump drive chain (1) after installing.
      Fig 24: Identifying Stopper Pin And Oil Pump Drive Chain
      G05980107Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Install front oil seal on front cover. Refer to FRONT OIL SEAL: REMOVAL AND INSTALLATION .
  9. Install timing chain tensioner cover (2) to front cover (1).
    Fig 25: Identifying Timing Chain Tensioner Cover To Front Cover
    G05980126Courtesy of NISSAN MOTOR CO., U.S.A.
    • Apply a continuous bead of liquid gasket with tube presser (commercial service tool) to front cover as shown.

    Use Genuine RTV Silicone Sealant or an equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .

  10. Install oil filter (for valve timing control solenoid valve) (1) in the direction shown below, if removed.
    • Check that the oil filter does not protrude from the upper surface of front cover (2) after installation.
    Fig 26: Identifying Oil Filter
    G04924656Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Install front cover as per the following:
    1. Install new O-ring (1), (2) onto cylinder heads and cylinder block.
      Fig 27: Identifying O-Ring, Cylinder Heads And Cylinder Block
      G05980106Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Apply a continuous bead of liquid gasket with tube presser (commercial service tool) to front cover as shown below.

      Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .

      Fig 28: Identifying Timing Chain Liquid Gasket Area
      G05980129Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check again that the matching marks on timing chain and that on each sprocket are aligned. Then, install front cover.
      CAUTION: Be careful not to damage front oil seal by interference with front end of crankshaft.
    4. Tighten mounting bolts in numerical order as shown below.
      Fig 29: Identifying Timing Chain Mounting Bolt Loosening Sequence
      G05980105Courtesy of NISSAN MOTOR CO., U.S.A.
      • There are three types of mounting bolts.
      1. 20 mm (0.79 in) 
      2. 45 mm (1.77 in) 
      3. 80 mm (3.15 in) 
      Fig 30: Identifying Timing Chain Mounting Bolt Area
      G05980131Courtesy of NISSAN MOTOR CO., U.S.A.
    5. After all mounting bolts are tightened, retighten them in numerical order as shown above.
    CAUTION: Be sure to wipe out any excessive liquid gasket leaking onto surface mating with oil pan.
  12. Install valve timing control cover as per the following:
    1. Install new O-rings (1) on front cover.
      Fig 31: Identifying O-Rings On Front Cover
      G05980104Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Install new seal rings (1) in shaft grooves.
      CAUTION: When replacing seal ring, replace all rings with new ones.
      Fig 32: Identifying Seal Rings In Shaft Grooves
      G05980133Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Apply a continuous bead of liquid gasket with tube presser (commercial service tool) to valve timing control covers as shown below.
      Fig 33: Identifying Valve Timing Control Covers
      G05980134Courtesy of NISSAN MOTOR CO., U.S.A.

      Use Genuine RTV Silicone Sealant or equivalent. Refer to  "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".

    4. Being careful not to move seal ring from the installation groove, align dowel pins on front cover with dowel pin holes (C) to install valve timing control covers.
      Fig 34: Identifying Dowel Pins On Front Cover With Dowel Pin Holes
      G05980135Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Tighten mounting bolts in numerical order as shown below.
  13. Install camshaft position sensor and valve timing control solenoid valve (RH and LH) to valve timing control cover, if removed.
    • Be sure to tighten mounting bolts with flanges completely seated.
  14. Install oil pan (lower) and oil strainer. Refer to EXPLODED VIEW .
  15. Install oil pan (upper). Refer to EXPLODED VIEW .
  16. Install water pump pulley. Refer to EXPLODED VIEW .
  17. Install crankshaft pulley.
    1. Install crankshaft pulley, taking care not to damage front oil seal.
    2. Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area.
      • Lightly tapping its center with plastic hammer, insert crankshaft pulley.
      CAUTION: Never tap crankshaft pulley on the side surface where belt is installed (outer circumference).
    3. Tighten crankshaft pulley bolt.

      Torque Specifications: 157 N.m (16 kg-m, 116 ft-lb) 

    4. Put a paint mark (A) on crankshaft pulley (1) aligning with angle mark (B) on crankshaft pulley bolt.
    5. Tighten crankshaft pulley bolt (clockwise).

      Angle tightening: 90 degrees (c) 

      • Check the tightening angle by referencing to the notches. The angle between two notches is 90 degrees.
    Fig 35: Tightening Crankshaft Pulley Bolt
    G05980136Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
  19. Install in the reverse order of removal.
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