Honda Prelude Accord Civic S2000 2001-2006

Rocker Arms/Shafts

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Removal & Installation




NOTE
The radio may contain a coded theft protection circuit. Always obtain the code number before disconnecting the battery.

1.7L (D17a1) Engine
1.7L (D17a2 & D17a6) Engines
2.0L Engine
2.2L Engines
2.3L Engines
2.4L Engines
3.0L Engines
Accord
2.3L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Turn the crankshaft so the No. 1 piston is at Top Dead Center (TDC).
    NOTE
    The No. 1 piston is at top dead center when the pointer on the block aligns with the white painted mark on the flywheel (manual transaxle) or driveplate (automatic transaxle).

  6.  
  7. Remove or disconnect the following:
    NOTE
    Label all electrical connectors before detaching them.


    NOTE
    Matchmark the installed position if the distributor before removal.



    Air intake duct
     
    Engine ground cable from the cylinder head cover
     
    Connector and the terminal from the alternator
     
    Engine wiring harness from the valve cover
     
    Ignition coil
     



    Electrical connectors from the distributor and the spark plug wires from the spark plugs.
     



    Distributor from the cylinder head
     
    Ignition coil wire from the distributor
     
    Positive Crankcase Ventilation (PCV) hose
     
    Cylinder head cover. Replace the rubber seals if damaged or deteriorated.
     
    Timing belt middle cover
     

  8.  
  9. Ensure the words UP embossed on the camshaft pulleys are aligned in the upward position.
  10.  
  11. Mark the rotation of the timing belt if it is to be used again. Loosen the timing belt adjusting nut 1 / 2 turn, then release the tension on the timing belt. Push the tensioner to release tension from the belt, then tighten the adjusting nut.
  12.  
  13. Remove the timing belt from the camshaft sprockets.
    WARNING
    Do not crimp or bend the timing belt more than 90°, or less than 1 inch (25mm) in diameter

  14.  
  15. Insert a 5.0mm pin punch in each of the camshaft caps, nearest to the sprockets, through the holes provided. Remove the camshaft sprocket attaching bolts, then remove the sprockets. Do not lose the sprocket keys.
  16.  
  17. Remove or disconnect the following:
    NOTE
    Note the camshaft holder-s locations for ease of installation. Loosen the bolts in the reverse order of the holder bolts torque sequence.


    NOTE
    The rocker arms have to be installed to their original locations if being reused.



    Side engine mount bracket B, then the timing belt back cover from behind the camshaft sprockets.
     
    Rocker arm adjusting screws, then the pin punches from the camshaft caps
     



    Camshaft holders
     
    Camshafts from the cylinder head, then discard the camshaft seals.
     
    Rubber cap from the head, located at the end of the intake camshaft.
     
    Rocker arms from the cylinder head. Note the locations of the rocker arms.
     

  18.  

To install:


NOTE
Lubricate the rocker arms with clean oil before installation.

  1. Install or connect the following:

    Rocker arms on the pivot bolts and the valve stems. If the rocker arms are being reused, install them to their original locations. The locknuts and adjustment screws should be loosened before installing the rocker arms.
     

  2.  
  3. Lubricate the camshafts with clean oil.
  4.  
  5. Install or connect the following:
    NOTE
    Be sure the keyways on the camshafts are facing up and install the camshafts to the cylinder head.



    Camshaft seals to the end of the camshafts that the timing belt sprockets attach to. The open side (spring) should be facing into the cylinder head when installed.
     



    Rubber plug to the cylinder head at the end of the intake camshaft
     

  6.  
  7. Apply liquid gasket to the head mating surfaces of the No. 1 and No. 6 camshaft holders, then install them along with No. 2, 3, 4 and 5. I or E marks are stamped on the camshaft holders to identify them as Intake or Exhaust side holders. The arrows stamped on the holders should point toward the timing belt.
  8.  
  9. Snug the camshaft holders in place.
  10.  
  11. Press the camshaft seals securely into place.
  12.  
  13. Tighten the camshaft holder bolts in 2 steps, following the proper sequence, to ensure that the rockers do not bind on the valves. Tighten all the bolts, except the 4 studs, to 84 inch lbs. (10 Nm). Tighten the studs (number 5 and 7 bolts in the correct sequence) to 108 inch lbs. (12 Nm).

    Click image to see an enlarged view

    Fig. Camshaft holders torque sequence-2.3L engine

  14.  
  15. Install or connect the following:

    Timing belt back cover.
     
    Side engine mount bracket B. Tighten the bolt attaching the bracket to the cylinder head to 33 ft. lbs. (45 Nm). Tighten the bolts attaching the bracket to the side engine mount to 16 ft. lbs. (22 Nm).
     

  16.  
  17. Insert a 5.0mm pin punch in each of the camshaft caps, nearest to the pulleys, through the holes provided. Install the keys into the camshaft grooves.
  18.  
  19. Push the camshaft sprockets onto the camshafts, then tighten the retaining bolts to 27 ft. lbs. (38 Nm).
  20.  
  21. Ensure the words UP embossed on the camshaft pulleys are aligned in the upward position. Install the timing belt to the camshaft sprockets, then remove the 2, 5.0mm pin punches from the camshaft bearing caps.
  22.  
  23. Loosen, then tighten the timing belt adjuster nut.
  24.  
  25. Turn the crankshaft counterclockwise until the cam pulley has moved 3 teeth; this creates tension on the timing belt. Loosen, then tighten the adjusting nut and tighten it to 33 ft. lbs. (45 Nm).
  26.  
  27. Adjust the valves.
  28.  
  29. Tighten the crankshaft pulley bolt to 181 ft. lbs. (250 Nm).
  30.  
  31. Install or connect the following:

    Middle timing belt cover and tighten the attaching bolts to 108 inch lbs. (12 Nm).
     
    Cylinder head cover and tighten the cap nuts to 84 inch lbs. (10 Nm).
     
    PCV hose to the cylinder head cover
     
    Distributor. Snug the attaching bolts until the timing has been checked and adjusted.
     
    Spark plug wires, then the distributor electrical connectors
     
    Ignition coil wire to the distributor.
     
    Ignition coil
     
    Alternator wiring harness to the cylinder head cover
     
    Terminal and connector to the alternator
     
    Engine ground cable to the cylinder head cover
     
    Air intake duct
     

  32.  
  33. Drain the oil from the engine into a sealable container. Install the drain plug and refill the engine with clean oil.
  34.  
  35. Connect the negative battery cable and enter the radio security code.
  36.  
  37. Start the engine and check carefully for any leaks.
  38.  
  39. Check and adjust the ignition timing. Tighten the distributor bolts to 13 ft. lbs. (18 Nm).
  40.  

2.4L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable. Remove the cylinder head cover.
  4.  
  5. Loosen the rocker arm assembly adjusting screws.
  6.  
  7. Remove the camshaft holder bolts.
    NOTE
    Unscrew the camshaft holder bolts two turns at a time in a crisscross pattern. This will prevent damage to camshafts.

  8.  
  9. Remove the cam chain guide, camshaft holders and camshafts.
  10.  
  11. To hold the rocker shaft holder assembly in place, insert two bolts in the front of the assembly and two bolts in the rear of the assembly.

    Click image to see an enlarged view

    Fig. Insert the bolts (A) into the rocker shaft holder, then remove the rocker arm assembly (B)-2.4L engine

  12.  
  13. Remove the rocker shaft assembly from the engine.
  14.  

To install:

  1. Clean and dry the No. 5 rocker shaft holding mating surface.
  2.  
  3. Apply a suitable liquid gasket P/N 08718-0009, or equivalent, evenly to the cylinder head mating surface of the No. 5 rocker shaft holder.
    NOTE
    The parts must be installed within 5 minutes of applying the liquid gasket.

  4.  
  5. Reassemble the rocker arm assembly, as necessary.
  6.  
  7. Install or connect the following

    Bolts (A) into the rocker shaft holder, then the rocker arm assembly on the cylinder head. Remove the bolts from the rocker shaft holder.
     

  8.  
  9. Make sure the punch marks on the variable valve timing control (VTC) actuator and exhaust camshaft sprocket are facing up, then set the camshafts (A) in the holder

    Click image to see an enlarged view

    Fig. When installing the camshafts (A) make sure the punch marks on the VTC actuator and exhaust cam sprockets are facing up-2.4L engine

  10.  
  11. Set the camshaft holders (B) and timing chain guide B (C) in place.
  12.  
  13. Tighten the bolts, in sequence, to the following specification:
    1. 8mm bolts: 16 ft. lbs. (22 Nm)
    2.  
    3. 6mm bolts: 8.7 ft. lbs. (12 Nm)

      Click image to see an enlarged view

      Fig. Rocker arm assembly bolt tightening sequence-2.4L engine

    4.  

  14.  
  15. Continue the installation in the reverse order of the removal procedure.
  16.  
  17. Adjust the valve lash.
  18.  

3.0L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable. Remove the timing belt.
  4.  
  5. Loosen the rocker arm assembly adjusting screws.
  6.  
  7. Remove the rocker arm assembly retaining bolts. Remove the rocker arm assembly from the engine.
    NOTE
    Unscrew the camshaft holder bolts two turns at a time in a crisscross pattern. This will prevent damage to the valves or rocker arm assembly. When removing the assembly, do not remove the camshaft holder bolts. These bolts will keep the camshaft holders, springs and rocker arms on the shafts.

  8.  

To install:

  1. Installation is the reverse of the removal procedure. Coat the retaining bolts with clean engine oil before installation.
  2.  
  3. Tighten each bolt 2 turns at a time in the crisscross sequence so that the rockers are evenly tightened and don't bind on the valves. Tighten the rocker arm bolts to 17 ft. lbs. (24 Nm).
  4.  
  5. Adjust the valve clearance.

    Click image to see an enlarged view

    Fig. Rocker arm assembly bolt tightening sequence-3.0L engine

  6.  

Civic
2.0L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable. Remove the cam chain.
  4.  
  5. Loosen the rocker arm assembly adjusting screws.
  6.  
  7. Remove the camshaft holder bolts.
    NOTE
    Unscrew the camshaft holder bolts two turns at a time in a crisscross pattern. This will prevent damage to camshafts.

  8.  
  9. Remove the cam chain guide, camshaft holders and camshafts.
  10.  
  11. To hold the rocker shaft holder assembly in place, insert two bolts in the front of the assembly and two bolts in the rear of the assembly.

    Click image to see an enlarged view

    Fig. Use bolts (A) to hold the rocker arm assembly (B) together while removing or replacing the assembly-2.0L and 2.2L engines

  12.  
  13. Remove the rocker shaft assembly from the engine.
  14.  

To install:

  1. Installation is the reverse of the removal procedure. Coat the retaining bolts with clean engine oil before installation.
  2.  
  3. Tighten each bolt 2 turns at a time in the crisscross sequence so that the rockers are evenly tightened and don't bind on the valves. Tighten the 8mm rocker arm bolts to 16 ft. lbs. (22 Nm). Tighten the 6mm bolts to 8.7 ft. lbs (12 Nm).
  4.  
  5. Adjust the valve clearance.

    Click image to see an enlarged view

    Fig. Rocker arm assembly bolt tightening sequence-Civic 2.0L engine

  6.  

Except 2.0L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable. Remove the timing belt.
  4.  
  5. Loosen the rocker arm assembly adjusting screws.
  6.  
  7. On 1.8L engine, remove the lost motion holder bolts. Remove the lost motion holder and the lost motion assemblies.
  8.  
  9. Remove the rocker arm assembly retaining bolts. Remove the rocker arm assembly from the engine.
    NOTE
    Unscrew the camshaft holder bolts two turns at a time in a crisscross pattern. This will prevent damage to the valves or rocker arm assembly. When removing the assembly, do not remove the camshaft holder bolts. These bolts will keep the camshaft holders, springs and rocker arms on the shafts.

  10.  

To install:

  1. Installation is the reverse of the removal procedure. Coat the retaining bolts with clean engine oil before installation.
  2.  
  3. Tighten each bolt 2 turns at a time in the crisscross sequence so that the rockers are evenly tightened and don't bind on the valves. Tighten the 8mm rocker arm bolts to 14 ft. lbs. (20 Nm). Tighten the 6mm bolts to 8.7 ft. lbs (12 Nm).
  4.  
  5. Torque the lost motion holder retaining bolts to 11 ft. lbs (15 Nm).
  6.  
  7. Adjust the valve clearance.

    Click image to see an enlarged view

    Fig. Rocker arm assembly bolt tightening sequence-1.7L and 1.8L engines

  8.  

Prelude
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Air intake duct
     
    Positive Crankcase Ventilation (PCV) hose
     
    Cylinder head cover. Replace the rubber seals if damaged or deteriorated.
     
    Timing belt upper cover
     

  4.  
  5. Bring the No. 1 cylinder to TDC. The white mark on the crankshaft pulley should align with the pointer on the timing belt cover. The words UP embossed on the camshaft pulley should be aligned in the upward position. The marks on the edge of the pulley should be aligned with the cylinder head or the back cover upper edge. Once in this position, the engine must NOT be turned or disturbed.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Matchmark the installed position distributor before removing it.



    Electrical connectors from the distributor and the spark plug wires from the spark plugs.
     



    Distributor from the cylinder head
     
    Power steering pump drive belt
     

  8.  
  9. Mark the rotation of the timing belt if it is to be used again. Loosen the timing belt adjusting bolt 3 / 4 to 1 turn, then release the tension on the timing belt. Push the tensioner to release tension from the belt, then tighten the adjusting bolt.
  10.  
  11. Remove or disconnect the following:
    WARNING
    Do not crimp or bend the timing belt more than 90°, or less than 1 inch (25mm) in diameter


    NOTE
    Ensure the words UP embossed on the camshaft pulley is aligned in the upward position.


    NOTE
    When removing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the camshaft holders, springs, and the rocker arms on the shafts.



    Timing belt from the camshaft sprocket
     



    Camshaft sprocket bolt, sprocket and sprocket key
     
    Timing belt back cover
     
    Valve adjusting screws
     
    Camshaft holder attaching bolts. Loosen the bolts 2 turns at a time in the proper sequence to prevent damaging the valves or rocker arm assemblies.

    Click image to see an enlarged view

    Fig. Rocker arm assembly bolt removal sequence-2.2L (H22A4) engines

     



    Camshaft holders and rocker arm assembly. If the rocker arm and shaft assembly needs to be disassembled for service, note the location of the components as they are removed. Install a rubber band around the VTEC rocker arm assemblies to keep them from coming apart during disassembly of the rocker arm assembly. The rocker arms must be installed in the same position if reused.
     
    Camshaft from the cylinder head and discard the seal.
     
    Oil control orifice
     

  12.  

To install:

  1. Wipe the camshaft and the camshaft journals clean, then lubricate both surfaces, and install the camshaft.
  2.  
  3. Turn the camshaft so that its keyway is facing up (No. 1 cylinder will be at Top Dead Center (TDC)).
  4.  
  5. Clean the oil control orifice and install a new O-ring, then install the oil control orifice.
  6.  
  7. Reassemble the rocker arm and shaft assembly, if it was disassembled. Lubricate the rocker arm and shaft assembly with clean oil, then apply liquid gasket to the head mating surfaces of the No. 1 and No. 6 camshaft holders.
  8.  
  9. Set the camshaft holders and rocker arm assembly in place, then loosely install the attaching bolts.
  10.  
  11. Apply clean oil to the camshaft oil seal lip and the seal guide (part # 07NAG-PT0010A), then install the seal to the seal guide. Install the seal guide to the camshaft, then the installer cup (part # 07NAF-PT0010A), and the installer shaft (part # 07NAF-PT0020A). Tighten the nut on the installer shaft to press the seal into the cylinder head.
  12.  
  13. Tighten the camshaft holder bolts 2 turns at a time in the proper sequence. The final torque for the 8mm bolts is 16 ft. lbs. (22 Nm) and the final torque for the 6mm bolts is 108 inch lbs. (12 Nm).

    Click image to see an enlarged view

    Fig. Rocker arm assembly torque sequence-2.2L (H22A4) engines

  14.  
  15. Install or connect the following:

    Timing belt back cover and a new gasket, if necessary. Tighten the bolt toward the exhaust manifold to 84 inch lbs. (10 Nm) and tighten the bolt toward the intake manifold to 108 inch lbs. (12 Nm).
     
    Camshaft sprocket key to the camshaft, then the camshaft sprocket and bolt. Tighten the bolt to 27 ft. lbs. (37 Nm).
     

  16.  
  17. Ensure the words UP embossed on the camshaft pulley is aligned in the upward position, then install the timing belt onto the camshaft sprocket. Loosen, then tighten the timing belt adjusting nut.
  18.  
  19. Rotate the crankshaft pulley 5 or 6 turns to position the timing belt on the pulleys.
  20.  
  21. Set the No. 1 cylinder to TDC and loosen the timing belt adjusting nut 1 turn. Turn the crankshaft counterclockwise until the cam pulley has moved 3 teeth; this creates tension on the timing belt. Loosen, then tighten the adjusting nut, and tighten it to 33 ft. lbs. (45 Nm).
  22.  
  23. Adjust the valves.
  24.  
  25. Tighten the crankshaft pulley bolt to 181 ft. lbs. (245 Nm).
  26.  
  27. Install or connect the following:

    Upper timing belt cover. Tighten the bolt toward the exhaust manifold to 84 inch lbs. (10 Nm) and tighten the bolt toward the intake manifold to 108 inch lbs. (12 Nm).
     
    Cylinder head cover gasket cover to the groove of the cylinder head cover. Before installing the gasket, thoroughly clean the seal and the groove. Seat the recesses for the camshaft first, then work it into the groove around the outside edges. Be sure the gasket is seated securely in the corners of the recesses.
     

  28.  
  29. Apply liquid gasket to the 4 corners of the recesses of the cylinder head cover gasket. Do not install the parts if 5 minutes or more have elapsed since applying liquid gasket. After assembly, wait at least 20 minutes before filling the engine with oil.
  30.  
  31. Install or connect the following:

    Cylinder head (valve) cover. Tighten the bolts attaching the cylinder head cover in the proper sequence to 84 inch lbs. (10 Nm).
     
    PCV hose to the cylinder head cover
     
    Power steering belt, then adjust the belt.
     
    Distributor to the cylinder head. Snug the attaching bolts until the timing has been checked and adjusted.
     
    Spark plug wires and the distributor electrical connectors
     
    Air intake duct
     

  32.  
  33. Drain the oil from the engine into a sealable container. Install the drain plug and refill the engine with clean oil.
  34.  
  35. Connect the negative battery cable and enter the radio security code.
  36.  
  37. Start the engine and check carefully for any leaks.
  38.  
  39. Check and adjust the ignition timing as necessary, then tighten the distributor bolts to 13 ft. lbs. (18 Nm).
  40.  

S2000
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable. Remove the cylinder head cover.
  4.  
  5. Loosen the rocker arm assembly adjusting screws.
  6.  
  7. Remove the camshaft holder bolts.
    NOTE
    Unscrew the camshaft holder bolts two turns at a time in a crisscross pattern. This will prevent damage to camshafts.

  8.  
  9. Remove the cam chain guide, camshaft holders and camshafts.
  10.  
  11. To hold the rocker shaft holder assembly in place, insert two bolts in the front of the assembly and two bolts in the rear of the assembly.
  12.  
  13. Remove the rocker shaft assembly from the engine.
  14.  

To install:

  1. Be sure the crankshaft pulley is at TDC. Align the TDC mark on the pulley with the pointer on the chain case.
  2.  
  3. Check the alignment of the TDC marks on the cam chain sprocket with the cylinder head surface. Align the TDC marks on the intake camshaft gear and the exhaust camshaft gear.
  4.  
  5. Install the camshafts.
  6.  
  7. Continue the installation is the reverse order of the removal procedure. Coat the retaining bolts with clean engine oil before installation.
  8.  
  9. Tighten each bolt 2 turns at a time in the crisscross sequence so that the rockers are evenly tightened and don't bind on the valves. Tighten all bolts to 16 ft. lbs. (22 Nm).
  10.  
  11. Adjust the valve clearance.

    Click image to see an enlarged view

    Fig. Rocker arm assembly bolt tightening sequence-2.2L and 2.2L engines

  12.  

 
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