Vue 2006-2007

Camshaft, Bearings & Lifters

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Bearing Replacement



Check each bearing for damage. If the bearing surface is excessively damaged, replace the cylinder head assembly or camshaft bearing cap, as necessary.

Inspection



2.2L Engine
  1. Inspect the camshaft journals and lobes for wear or scoring.
  2.  
  3. Inspect the camshaft sprocket alignment notch for damage.
  4.  
  5. Inspect the camshaft cover for damage or loose oil control baffles.
  6.  
  7. Clean the camshaft cover.
  8.  
  9. Wash the camshaft in solvent.
  10.  
  11. Oil the camshaft.
  12.  
  13. Inspect the camshaft cover for cracks or other signs of damage.
  14.  

2.4L Engine
  1. Clean the camshaft in solvent.
  2.  
  3. Dry the camshaft with compressed air.
  4.  
  5. Inspect the camshaft for the following conditions:
    1. Worn, scored, or damaged bearing journals
    2.  
    3. Worn camshaft lobes
    4.  
    5. Damaged sprocket pin
    6.  

  6.  
  7. Measure the camshaft journals with a micrometer to be sure they are within specification.

    Click image to see an enlarged view

    Fig. Measure the camshaft journals with a micrometer

  8.  
  9. Measure for a bent camshaft or excessive camshaft runout using J 7872, Magnetic Base Dial Indicator.
  10.  
  11. Mount the camshaft in V-blocks between centers.
  12.  
  13. Use the J 7872 in order to measure for a bent camshaft.
  14.  
  15. Replace the camshaft if runout exceeds specifications.
  16.  
  17. Inspect the camshaft bearings and bearing cap surfaces for the following:
    1. Wear
    2.  
    3. Scoring
    4.  
    5. Overheating from lack of lubrication
    6.  

  18.  
  19. Inspect the bearing clearances with gauging plastic.
  20.  
  21. Inspect the camshaft for excessive end play.
  22.  

3.5L Engine
  1. Clean the camshaft and inspect for pitted, scored or excessively worn lobes.
  2.  
  3. Measure the diameter of each bearing journal.
    NOTE
    In order to properly measure the camshaft journal bores, the rocker arm shafts must be bolted to the cylinder heads.



    Click image to see an enlarged view

    Fig. Measure the diameter of each bearing journal

  4.  
  5. Remove the rocker arms (215, 218) and springs (219) from the shafts (220, 221).

    Click image to see an enlarged view

    Fig. Remove the rocker arms (215, 218) and springs (219) from the shafts (220, 221)

  6.  
  7. Lubricate the bolt threads and flanges with clean engine oil.
  8.  
  9. Install the rocker arm shafts and bolts to the cylinder heads.
  10.  
  11. Tighten the left cylinder head rocker shaft bolts in sequence:
    1. Tighten the bolts a first pass to 106 inch lbs. (12 Nm).
    2.  
    3. Tighten the bolts a final pass to 17 ft. lbs. (24 Nm).

      Click image to see an enlarged view

      Fig. Tighten the left cylinder head rocker shaft bolts in sequence

    4.  

  12.  
  13. Tighten the right cylinder head rocker shaft bolts in sequence:
    1. Tighten the bolts a first pass to 106 inch lbs. (12 Nm).
    2.  
    3. Tighten the bolts a final pass to 17 ft. lbs. (24 Nm).

      Click image to see an enlarged view

      Fig. Tighten the right cylinder head rocker shaft bolts in sequence

    4.  

  14.  
  15. Clean the bearing surfaces in the cylinder head and measure the inside diameter (ID) of each camshaft bearing surface. Also, inspect for an out-of-round condition.
  16.  
  17. Calculate the camshaft-to-journal clearance:
    1. Camshaft-to-journal clearance-new: 0.002-0.008 inch (0.05-0.2mm)
    2.  
    3. Camshaft-to-journal clearance-service limit 0.008 inch (0.2mm)
    4.  

  18.  
  19. Install the camshaft into V-blocks and use the J 7872 to measure the runout:
    1. Camshaft total runout-new: 0.001 inch (0.03mm)
    2.  
    3. Camshaft total runout-service limit: 0.002 inch (0.04mm)
    4.  

  20.  
  21. Identify the camshaft lobes:
    1. Exhaust (1)
    2.  
    3. Intake primary-right cylinder head (2)
    4.  
    5. Intake mid (3)
    6.  
    7. Intake secondary-right cylinder head (4)
    8.  
    9. Intake secondary-left cylinder head (5)
    10.  
    11. Intake primary-left cylinder head (6)

      Click image to see an enlarged view

      Fig. Identify the camshaft lobes

    12.  

  22.  
  23. Measure the camshaft lobe height. If the measurement is less than the specification, replace the camshaft.
    1. Intake primary lobe height: 1.3796 inch (35.041mm)
    2.  
    3. Intake mid lobe height: 1.4348 inch (36.445mm)
    4.  
    5. Intake secondary lobe height: 1.3891 inch (35.284mm)
    6.  
    7. Exhaust lobe height: 1.4302 inch (36.326mm)
    8.  

  24.  
  25. To check camshaft endplay:
    NOTE
    In order to properly measure camshaft end play, the rocker arm shafts must be bolted to the cylinder heads.

    1. Remove the rocker arms (215 and 218) and springs (219) from the shafts (220 and 221).
    2.  
    3. Lubricate the bolt (214) threads and flanges with clean engine oil.
    4.  
    5. Install the rocker arm shafts (220, 221) and bolts (214) to the cylinder heads.

      Click image to see an enlarged view

      Fig. Remove the rocker arms (215 and 218) and springs (219) from the shafts (220 and 221)

    6.  
    7. Tighten the left cylinder head rocker shaft bolts in sequence:

      Tighten the bolts a first pass to 106 inch lbs. (12 Nm)
       
      Tighten the bolts a final pass to 17 ft. lbs (24 Nm)

      Click image to see an enlarged view

      Fig. Tighten the left cylinder head rocker shaft bolts in sequence

       

    8.  
    9. Tighten the right cylinder head rocker shaft bolts in sequence:

      Tighten the bolts a first pass to 106 inch lbs (12 Nm)
       
      Tighten the bolts a final pass to 17 ft. lbs. (24 Nm)

      Click image to see an enlarged view

      Fig. Tighten the right cylinder head rocker shaft bolts in sequence

       

    10.  
    11. Install the camshafts (209), caps (211), and bolts (212).
    12.  
    13. Tighten the bolts to 16 ft. lbs. (22 Nm).

      Click image to see an enlarged view

      Fig. Install the camshafts (209), caps (211), and bolts (212)

    14.  
    15. Seat the camshaft by pushing it toward the rear of the cylinder head.
    16.  
    17. Use the SA9179NE Dial Indicator in order to measure the end play. Zero the dial indicator against the end of the camshaft. Push the camshaft forward and rearward and measure the end play:

      Camshaft end play-new: 0.05-0.2 mm (0.002-0.008 in)
       
      Camshaft end play-service limit: 0.2 mm (0.008 in)

      Click image to see an enlarged view

      Fig. Use the SA9179NE Dial Indicator in order to measure the end play

       

    18.  

  26.  

Removal & Installation



2.2L Engine

NOTE
Be very careful when working around the camshaft sprockets and timing chain cover during this procedure. If a bolt or washer is accidentally dropped between the front cover and engine assembly, the cover will have to be removed for retrieval.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:
    NOTE
    To avoid valve piston contact, the No. 1 cylinder piston must be positioned at 60 degrees Before Top Dead Center (BTDC). The pistons are properly aligned when the diamond shaped hole on the intake camshaft sprocket is located at 12 o-clock.



    The negative battery cable
     
    The air cleaner assembly
     
    The ignition coil
     
    The coolant degas hose clips from the fuel rail
     
    The ground strap
     
    The fuel rail bracket
     
    The fuel line
     
    The cam cover
     
    The purge solenoid from the power steering plate, if removing the intake camshaft
     
    The power steering block off the plate, if removing the intake camshaft
     

  6.  
  7. Remove the upper timing chain guide and front camshaft caps.
  8.  
  9. Install a camshaft sprocket holding tool J43655 through the sprocket holes from the timing chain side. Align the guide pins into the slot on the support head. Torque the pins to 89 inch lbs. (10 Nm).
  10.  
  11. Hold each camshaft in place with a 24mm open end wrench and remove the camshaft timing sprocket retaining bolts and washers. Discard the bolts.
  12.  
  13. Uniformly loosen and remove the remaining camshaft bearing caps.
  14.  
  15. Slide the camshaft sprockets away from the camshafts and remove the camshaft.

    Click image to see an enlarged view

    Fig. Remove the camshaft and bearing caps-2.2L engine

  16.  

To install:

  1. Lubricate the camshaft bearing journals with clean engine oil.
  2.  
  3. Install both camshafts and all bearing caps except the front cap on each camshaft.
  4.  
  5. Torque the bearing caps uniformly, except for the front caps and the rear intake cap, to 89 inch lbs. (10 Nm).
    NOTE
    Make certain that the alignment notches are properly positioned with the notches in the camshaft sprockets before final torque is applied. Also, be sure that the timing chain is properly aligned on the fixed guide.

  6.  
  7. Slide the camshaft sprockets and timing chain on the guide pins toward the camshafts. Rotate the camshafts with a 24mm open end wrench to align the camshaft and sprocket.

    Click image to see an enlarged view

    Fig. Make certain that the alignment notches are properly positioned with the notches in the camshaft sprockets-2.2L engine

  8.  
  9. Install new camshaft sprocket bolts and torque them to 63 ft. lbs. (85 Nm) plus 30°.
  10.  
  11. Remove the camshaft sprocket holding tool.
  12.  
  13. Install or connect the following:

    The front camshaft bearing caps and torque the bolts to 89 inch lbs. (10 Nm)
     
    The upper timing chain guide and apply Loctite®to the bolts
     
    The rear intake camshaft bearing cap and torque the bolts 19 ft. lbs. (25 Nm)
     
    The power steering block off plate and torque the bolts to 19 ft. lbs. (25 Nm)
     
    The cam cover
     
    The fuel line and tighten the fitting to 89 inch lbs. (10 Nm)
     
    The fuel line bracket and tighten to 89 inch lbs. (10 Nm)
     
    The ground strap
     
    The coolant degas hose
     
    The ignition coil
     
    The air cleaner assembly
     
    The negative battery cable
     

  14.  
  15. Start the vehicle and check for leaks, repair if necessary.
  16.  

2.4L Engine
Exhaust Camshaft
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the exhaust camshaft position actuator as follows:
    1. Remove the camshaft cover.
      NOTE
      Ensure that the timing chain and the camshaft position actuators are marked for proper assembly.

    2.  
    3. Mark the intake and exhaust camshaft actuators and the respective locations on the timing chain.
    4.  
    5. Remove the upper timing chain guide bolts and guide.
    6.  
    7. Remove the timing chain tensioner.
    8.  
    9. Install a 24mm wrench onto the hex on the camshaft in order to hold the camshaft.
    10.  
    11. Loosen, but DO NOT remove the exhaust camshaft actuator bolt.
      NOTE
      Make sure that the tips of a Timing Chain Tensioner Tool such as J 44217 are fully engaged into the timing chain.



      Click image to see an enlarged view

      Fig. Make sure that the tips of a Timing Chain Tensioner Tool such as J 44217 are fully engaged into the timing chain-2.4L engine



      Click image to see an enlarged view

      Fig. Install the tools (1) from a Timing Chain Tensioner Tool such as J 44217 to the exhaust camshaft side of the timing chain assembly in order to retain the timing chain-2.4L engine

    12.  
    13. Install one of the tools from a Timing Chain Tensioner Tool such as J 44217 to the exhaust camshaft side of the timing chain assembly in order to retain the timing chain. Firmly tighten the nuts.
    14.  
    15. Ensure that the timing chain and the camshaft position actuators are marked for proper assembly.
    16.  
    17. Install a 24mm wrench onto the hex on the camshaft in order to hold the camshaft.
    18.  
    19. Remove and discard the exhaust camshaft actuator bolt.
    20.  
    21. Remove the exhaust camshaft actuator from the camshaft while also removing the actuator from the timing chain.
      NOTE
      Remove each bolt on each cap one turn at a time until there is no spring tension pushing on the camshaft.

    22.  

  4.  
  5. Mark the bearing caps to ensure they are installed in the original position.
  6.  
  7. Remove the bearing cap bolts.
  8.  
  9. Remove the bearing caps.
  10.  
  11. Remove the exhaust camshaft.
    NOTE
    Keep all of the roller followers and hydraulic adjusters in order so that they can be reinstalled in their respective locations.

  12.  
  13. Remove the camshaft roller followers.
  14.  
  15. Remove the hydraulic element lash adjusters.
  16.  

To install:

  1. Install the hydraulic element lash adjusters into their bores in the cylinder head.
  2.  
  3. Lubricate the hydraulic lash adjusters with GM Molylube®.

    Click image to see an enlarged view

    Fig. Lubricate the hydraulic lash adjusters-2.4L engine

  4.  
  5. Lubricate the valve tips with GM Molylube®.
    NOTE
    Used roller followers MUST be returned to their original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.

  6.  
  7. Position the camshaft roller followers on the tip of the valve stem and on the lash adjuster. Lubricate the roller followers with GM Molylube®.
  8.  
  9. Install the exhaust camshaft and lubricate with GM Molylube®.
  10.  
  11. Install the camshaft bearing caps. Hand tighten the cap bolts.
  12.  
  13. Tighten the bearing cap bolts in increments of 3 turns until they are seated to 89 in. lbs. (10 Nm).
  14.  
  15. Install the exhaust camshaft position actuator as follows:
    NOTE
    Ensure that the alignment mark made previously on the intake camshaft actuator is still aligned properly with the mark on the timing chain.

    1. Install the timing chain onto the exhaust camshaft actuator.
    2.  
    3. Align the intake camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft.
    4.  
    5. Install a NEW intake camshaft actuator bolt until snug.
    6.  
    7. Remove the tool from the intake camshaft side of the timing chain assembly.
    8.  
    9. Remove the tool from the exhaust camshaft side of the timing chain assembly.
    10.  
    11. Install a 24 mm wrench onto the hex on the camshaft in order to hold the camshaft.
    12.  
    13. Tighten the NEW camshaft actuator bolt to 63 ft. lbs. (85 Nm) plus an additional 30 degrees.
    14.  
    15. Remove the old oil from the timing chain tensioner.
    16.  
    17. Inspect the timing chain tensioner for scoring or free movement.
    18.  
    19. Inspect the timing chain washer and O-ring for damage. If damaged, replace the timing chain tensioner.
    20.  
    21. Measure the timing chain tensioner assembly from end to end. A NEW tensioner should be supplied in the fully compressed non-active state. A tensioner in the compressed state will measure 2.83 in. (72mm) from end to end (a). A tensioner in the active state will measure 3.35 in. (85mm) from end to end (a).

      Click image to see an enlarged view

      Fig. Measure the timing chain tensioner assembly from end to end. A NEW tensioner should be supplied in the fully compressed non-active state. A tensioner in the compressed state will measure 2.83 in. (72mm) from end to end (a). A tensioner in the active state will measure 3.35 in. (85mm) from end to end (a)-2.4L engine

    22.  
    23. If the timing chain tensioner is not in the compressed state, perform the following:

      Remove the piston assembly from the body of the timing chain tensioner by pulling it out
       
      Install a timing chain tensioner tool such as J 45027-2 into a vise
       
      Install the notch end of the piston assembly into the tool
       
      Using the tool, turn the ratchet cylinder into the piston
       

    24.  
    25. Inspect the bore of the tensioner body for dirt, debris, and damage. If any damage appears, replace the tensioner. Clean dirt or debris with a lint free cloth.
    26.  
    27. Install the compressed piston assembly back into the timing chain tensioner body until the assembly stops at the bottom of the bore. Do not compress the piston assembly against the bottom of the bore. If the piston assembly is compressed against the bottom of the bore, the assembly will activate the tensioner, which will then need to be reset again.
    28.  
    29. At the point the tension should measure approximately 2.83 in. (72mm) from end to end. If the tensioner does not measure 2.83 in. (72mm) repeat the steps using the timing chain tensioner tool.
    30.  
    31. Ensure that all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
    32.  
    33. Install the timing chain tensioner and tighten to 66 ft. lbs. (75 Nm).
    34.  
    35. The timing chain tensioner is released by compressing the tensioner 0.079 in. (2mm) which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam chest to rest on the timing chain, then give a sharp jolt diagonally downwards to release the tensioner.
    36.  
    37. Install the upper timing chain guide and bolts. Tighten to 89 in. lbs. (10 Nm).
    38.  
    39. Install the camshaft cover.
    40.  

  16.  

Intake Camshaft
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the intake camshaft position actuator as follows:
    1. Remove the camshaft cover.
    2.  
    3. Remove the upper timing chain guide bolts and guide.
    4.  
    5. Install a 24 mm wrench onto the hex on the camshaft in order to hold the camshaft.
    6.  
    7. Loosen, but DO NOT remove the intake camshaft actuator bolt.
      NOTE
      Make sure that the tips of a Timing Chain Tensioner Tool such as J 44217 are fully engaged into the timing chain.



      Click image to see an enlarged view

      Fig. Make sure that the tips of a Timing Chain Tensioner Tool such as J 44217 are fully engaged into the timing chain-2.4L engine



      Click image to see an enlarged view

      Fig. Install the tools (1) from a Timing Chain Tensioner Tool such as J 44217 to the exhaust camshaft side of the timing chain assembly in order to retain the timing chain-2.4L engine

    8.  
    9. Install one of the tools from a Timing Chain Tensioner Tool such as J 44217 to the exhaust camshaft side of the timing chain assembly in order to retain the timing chain. Firmly tighten the nuts.
      NOTE
      Ensure that the tips from a Timing Chain Tensioner Tool such as J 44217 are fully engaged into the timing chain.

    10.  
    11. Install one of the tools from a Timing Chain Tensioner Tool such as J 44217 to the intake camshaft side of the timing chain assembly in order to retain the timing chain. Firmly tighten the nuts.
    12.  
    13. Ensure that the timing chain and the camshaft position actuators are marked for proper assembly.
    14.  
    15. Mark the intake and exhaust camshaft actuators and the respective locations on the timing chain.
    16.  
    17. Install a 24 mm wrench onto the hex on the camshaft in order to hold the camshaft.
    18.  
    19. Remove and discard the intake camshaft actuator bolt.
    20.  
    21. Remove the intake camshaft actuator) from the camshaft while also removing the actuator from the timing chain.
      NOTE
      Remove each bolt on each cap one turn at a time until there is no spring tension pushing on the camshaft.

    22.  

  4.  
  5. Mark the bearing caps to ensure they are installed in the original position.
  6.  
  7. Remove the bearing cap bolts.
  8.  
  9. Remove the bearing caps.
  10.  
  11. Remove the intake camshaft.
    NOTE
    Keep all of the roller followers and hydraulic adjusters in order so that they can be reinstalled in their respective locations.

  12.  
  13. Remove the camshaft roller followers.
  14.  
  15. Remove the hydraulic element lash adjusters.
  16.  

To install:

  1. Install the hydraulic element lash adjusters into their bores in the cylinder head.
  2.  
  3. Lubricate the hydraulic lash adjusters with GM Molylube®.

    Click image to see an enlarged view

    Fig. Lubricate the hydraulic lash adjusters-2.4L engine

  4.  
  5. Lubricate the valve tips with GM Molylube®.
    NOTE
    Used roller followers MUST be returned to their original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.

  6.  
  7. Position the camshaft roller followers on the tip of the valve stem and on the lash adjuster. Lubricate the roller followers with GM Molylube®.
  8.  
  9. Install the intake camshaft and lubricate with GM Molylube®.
  10.  
  11. Install the camshaft bearing caps. Hand tighten the cap bolts.
  12.  
  13. Tighten the bearing cap bolts in increments of 3 turns until they are seated to 89 in. lbs. (10 Nm).
  14.  
  15. Install the intake camshaft position actuator as follows:
    NOTE
    Ensure that the alignment mark made previously on the exhaust camshaft actuator is still aligned properly with the mark on the timing chain.

    1. Install the timing chain onto the intake camshaft actuator.
    2.  
    3. Align the intake camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft.
    4.  
    5. Install a NEW intake camshaft actuator bolt until snug.
    6.  
    7. Remove the tool from the intake camshaft side of the timing chain assembly.
    8.  
    9. Remove the tool from the exhaust camshaft side of the timing chain assembly.
    10.  
    11. Install a 24 mm wrench onto the hex on the camshaft in order to hold the camshaft.
    12.  
    13. Tighten the NEW camshaft actuator bolt to 63 ft. lbs. (85 Nm) plus 30°.
    14.  
    15. Install the upper timing chain guide and bolts. Tighten the bolts to 89 in. lbs. (10 Nm).
    16.  
    17. Install the camshaft cover.
    18.  

  16.  

3.5L Engine
Left
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the battery and tray.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove the upper radiator hose.
  8.  
  9. Remove the Exhaust Gas Recirculation (EGR) valve.
  10.  
  11. Remove the oil dipstick tube.
  12.  
  13. Remove the oil fill cap.
  14.  
  15. Remove the Positive Crankcase Ventilation (PCV) valve and bolt.
  16.  
  17. Disconnect the ignition wring harness from the ignition coils and retaining bracket.
  18.  
  19. Remove the wiring harness bracket bolt from the cylinder head.
  20.  
  21. Remove the bolts the ignition coils.
  22.  
  23. Remove the bolts, grommets, valve cover and gasket.
  24.  
  25. Remove the seals, if required.
  26.  
  27. Remove the left camshaft drive sprocket as follows:
    1. Remove the timing belt.
    2.  
    3. Use timing belt alignment kit EN 46337 to retain the camshaft sprocket.
    4.  

  28.  
  29. Remove the camshaft bolt and sprocket.
  30.  
  31. Loosen the adjusting nuts and bolts.

    Click image to see an enlarged view

    Fig. Loosen the adjusting nuts (217) and bolts (216)-3.5L engine



    Click image to see an enlarged view

    Fig. Loosen the left side rocker shaft retaining bolts in sequence-3.5L engine

  32.  
  33. Loosen the left side rocker shaft retaining bolts in the sequence illustrated .
  34.  
  35. Loosen the valve rocker shaft mounting bolts two turns at a time in sequence, to prevent damaging the valves or rocker arms.
    NOTE
    Make sure to not each components location as it is being removed so that it may be installed in its correction location upon assembly. When removing or installing the rocker arm shaft assembly, do not remove the rocker arm shaft mounting bolts. The bolts will retain the springs and rocker arms on the shaft.



    Click image to see an enlarged view

    Fig. Exploded view of the rocker assembly-3.5L engine

  36.  
  37. Remove the bolts, valve rocker arm and shaft assemblies.
  38.  
  39. Remove the lash adjusters.
  40.  
  41. Remove the intake valve rocker arms as an assembly from the shaft.
  42.  
  43. Remove the exhaust valve rocker arms and springs from the shaft.
  44.  
  45. Remove the nuts and bolts.
  46.  
  47. Note the installed location of the exhaust valve rocker arms.
  48.  
  49. Remove the rear camshaft cap, bolts, and O-ring.
  50.  
  51. Remove the camshaft from the cylinder head.
  52.  
  53. Remove the camshaft seal.
  54.  
  55. Clean all of the bearing surfaces and sealing surfaces.
  56.  

To install:

  1. Lubricate the camshaft journals and bores with clean engine oil.
  2.  
  3. Install the camshaft, with new O-ring, cap, and bolts. Tighten the bolts to 16 ft. lbs. (22 Nm).
  4.  
  5. Install a new camshaft seal.
  6.  
  7. Install the bolts and nuts. Do not tighten the nuts at this time.
  8.  
  9. Install the intake valve rocker arm assemblies onto the shaft.
  10.  
  11. Install the bolts to the shaft.
  12.  
  13. Install the exhaust valve rocker arms and springs onto the shaft.
  14.  
  15. Note the installed position of the exhaust valve rocker arms.
  16.  
  17. Install the bolts onto the shaft.
  18.  
  19. Install the lash adjusters.
    NOTE
    The intake rocker arm shaft front locating pin serves as an oil passage for VTEC system operation. During assembly, use care to locate the shaft onto the pin. Replace pins that are bent or damaged.

  20.  
  21. Install the rocker arm and shaft assemblies and bolts.
  22.  
  23. Tighten the left side rocker shaft retaining bolts in the sequence illustrated. Tighten the bolts 2 turns at a time in, to ensure that the rocker arms do not bind on the valves as follows:
    1. First pass: 106 inch lbs. (12 Nm).
    2.  
    3. Final pass: 27 ft. lbs. (24 Nm).

      Click image to see an enlarged view

      Fig. Tighten the left side rocker shaft retaining bolts in sequence-3.5L engine

    4.  

  24.  
  25. Install the left camshaft drive sprocket.
  26.  
  27. Install new seals, new gasket and the cover
  28.  
  29. Install new grommets and the bolts, tighten the bolts in sequence as follows:
    1. First pass: 53 inch lbs. (6 Nm).
    2.  
    3. Final pass: 106 inch lbs. (12 Nm).
    4.  

  30.  
  31. Install the ignition coils and tighten the bolts to 106 inch lbs. (12 Nm).
  32.  
  33. Install the wiring harness bracket bolt to the cylinder head and tighten to 89 inch lbs. (10 Nm).
  34.  
  35. Connect the ignition wiring harness to the retaining bracket and ignition coils.
  36.  
  37. Install the oil dipstick tube and new O-rings.
  38.  
  39. Install a new O-rings, the PCV valve and bolt. Tighten the bolt to 106 inch lbs. (12 Nm.
  40.  
  41. Install a new O-ring and the oil fill cap.
  42.  
  43. Install the EGR valve.
  44.  
  45. Install the upper radiator hose.
  46.  
  47. Fill the cooling system.
  48.  
  49. Install the battery tray and tray.
  50.  

Right
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the battery and tray.
  4.  
  5. Remove the battery tray.
  6.  
  7. Remove the underhood fuse/relay box.
  8.  
  9. Disconnect the fuel feed line from the fuel rail.
  10.  
  11. Disconnect the engine harness connectors to gain access.
  12.  
  13. Remove the Powertrain Control Module (PCM).
  14.  
  15. Disconnect the vacuum brake booster hose.
  16.  
  17. Disconnect the Manifold Absolute Pressure (MAP) sensor connector.
  18.  
  19. Disconnect the Intake Air Temperature (IAT) sensor connector.
  20.  
  21. Disconnect the Engine Coolant Temperature (ECT) sensor connector.
  22.  
  23. Disconnect the EVAP purge hose from the purge valve.
  24.  
  25. Remove the intake manifold.
  26.  
  27. Disconnect the fuel injector connectors.
  28.  
  29. Remove the wiring harness bracket bolt from the valve rocker arm cover.
  30.  
  31. Remove the ignition coils.
  32.  
  33. Remove the bolts, grommets, valve cover and gasket.
  34.  
  35. Remove the seals, if required.
  36.  
  37. Remove the right camshaft drive sprocket as follows:
    1. Remove the timing belt.
    2.  
    3. Use timing belt alignment kit EN 46337 to retain the camshaft sprocket.
    4.  

  38.  
  39. Remove the camshaft bolt and sprocket.
  40.  
  41. Loosen the adjusting nuts and bolts.

    Click image to see an enlarged view

    Fig. Loosen the adjusting nuts (217) and bolts (216)-3.5L engine



    Click image to see an enlarged view

    Fig. Loosen the right side rocker shaft retaining bolts in sequence-3.5L engine

  42.  
  43. Loosen the right side rocker shaft retaining bolts in the sequence illustrated.
  44.  
  45. Loosen the valve rocker shaft mounting bolts two turns at a time in sequence, to prevent damaging the valves or rocker arms.
    NOTE
    Make sure to not each components location as it is being removed so that it may be installed in its correction location upon assembly. When removing or installing the rocker arm shaft assembly, do not remove the rocker arm shaft mounting bolts. The bolts will retain the springs and rocker arms on the shaft.

  46.  
  47. Remove the lash adjusters.
  48.  
  49. Remove the intake valve rocker arms as an assembly from the shaft.
  50.  
  51. Remove the exhaust valve rocker arms and springs from the shaft.
  52.  
  53. Remove the nuts and bolts.
  54.  
  55. Note the installed location of the exhaust valve rocker arms.
  56.  
  57. Remove the rear camshaft cap, bolts, and O-ring.
  58.  
  59. Remove the camshaft from the cylinder head.
  60.  
  61. Remove the camshaft seal.
  62.  
  63. Clean all of the bearing surfaces and sealing surfaces.
  64.  

To install:

  1. Lubricate the camshaft journals and bores with clean engine oil.
  2.  
  3. Install the camshaft, with new O-ring, cap, and bolts. Tighten the bolts to 16 ft. lbs. (22 Nm).
  4.  
  5. Install a new camshaft seal.
  6.  
  7. Install the bolts and nuts. Do not tighten the nuts at this time.
  8.  
  9. Install the intake valve rocker arm assemblies onto the shaft.
  10.  
  11. Install the bolts to the shaft.
  12.  
  13. Install the exhaust valve rocker arms and springs onto the shaft.
  14.  
  15. Note the installed position of the exhaust valve rocker arms.
  16.  
  17. Install the bolts onto the shaft.
  18.  
  19. Install the lash adjusters.
    NOTE
    The intake rocker arm shaft front locating pin serves as an oil passage for VTEC system operation. During assembly, use care to locate the shaft onto the pin. Replace pins that are bent or damaged.

  20.  
  21. Install the rocker arm and shaft assemblies and bolts.
  22.  
  23. Tighten the right side rocker shaft retaining bolts in the sequence illustrated. Tighten the bolts 2 turns at a time in, to ensure that the rocker arms do not bind on the valves as follows:
    1. First pass: 106 inch lbs. (12 Nm.
    2.  
    3. Final pass: 27 ft. lbs. (24 Nm).

      Click image to see an enlarged view

      Fig. Tighten the right side rocker shaft retaining bolts in sequence-3.5L engine

    4.  

  24.  
  25. Install the left camshaft drive sprocket.
  26.  
  27. Install new seals, new gasket and the cover
  28.  
  29. Install new grommets and the bolts, tighten the bolts in sequence as follows:
    1. First pass: 53 inch lbs. (6 Nm).
    2.  
    3. Final pass: 106 inch lbs. (12 Nm).
    4.  

  30.  
  31. Install the ignition coils and tighten the bolts to 106 inch lbs. (12 Nm).
  32.  
  33. Install the wiring harness bracket bolt to the cylinder head and tighten to 89 inch lbs. (10 Nm).
  34.  
  35. Connect the fuel injector connectors.
  36.  
  37. Install the intake manifold.
  38.  
  39. Connect the EVAP purge hose.
  40.  
  41. Connect the IAT sensor connector.
  42.  
  43. Connect the MAP sensor connector.
  44.  
  45. Connect the vacuum brake booster hose.
  46.  
  47. Connect the ECT sensor connector.
  48.  
  49. Install the PCM.
  50.  
  51. Connect the engine harness connectors .
  52.  
  53. Connect the fuel feed line to the fuel rail.