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Variable Cylinder Management Rocker Arm: Test

  1. Ignition Coil and Spark Plug - Remove
  2. Cylinder Head Cover - Remove - Refer to:

    Cylinder Head Cover (6-Speed A/T), ('16-'18 9-Speed A/T) - Removal and Installation

    Cylinder Head Cover (9-Speed A/T) - Removal and Installation (2019 2020 2021)

  3. VTEC Rocker Arm - Test
    GHH308395Courtesy of HONDA, U.S.A., INC.
    		 Front Bank 

    1. Rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) should move independently of the intake secondary rocker arm (B):

    • If the intake primary and secondary rocker arms do not move independently, remove the intake primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
    • If the intake primary and secondary rocker arms move independently, go to step 2.
    GHH308396Courtesy of HONDA, U.S.A., INC.
    		 Rear Bank 

    2. Rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary L rocker arm (B) should move together, on the other hand, intake primary rocker arm and the intake secondary H rocker arm (C) should move independently:

    • If the intake primary and secondary L rocker arms do not move together, remove the intake primary, secondary L and H rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the intake primary, secondary rocker arms L and H as an assembly, then retest.
    • If the intake primary rocker arm and the intake secondary L rocker arms move together, go to step 3.
    GHH308397Courtesy of HONDA, U.S.A., INC.
    		 3. Rotate the crankshaft pulley clockwise. Make sure that the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) are mechanically connected by the pistons and that the exhaust primary rocker arm and the exhaust secondary rocker arms should move together:
    • If the exhaust primary and secondary rocker arms do not move together, remove the exhaust primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the exhaust primary and secondary rocker arms as an assembly, then retest.
    • If the exhaust primary and secondary rocker arms move together, go to the next procedure.
  4. Air Pressure - Check
    1. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.04 kgf/cm2, 100.1 psi).
  5. Valve Clearance - Inspect 
  6. VTEC/VCM Change Over - Test
    Front (VTEC) 
    GHH308398GHH308399GHH308400Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    Rear (VTEC) 

    GHH308398GHH308399GHH308400Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    Rear (VCM) 

    GHH308398GHH308399GHH308400Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    		 1. Remove the sealing bolt, then install the VCM air adapter (A) to the inspection hole and install VTEC air stop tool B, then connect the air pressure regulator (C) as shown.

    2. Loosen the valve on the air pressure regulator, and apply the specified air pressure.


    Specified Air Pressure 
    441 - 490 kPa (4.50 - 5.00 kgf/cm2, 64.0 - 71.1 psi) 
    GHH308401Courtesy of HONDA, U.S.A., INC.
    		 Front (VTEC) 

    3. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary rocker arm (B) are mechanically connected by the pistons and that the intake primary and secondary rocker arms should move together:

    • If the intake primary and secondary rocker arms move independently, remove the intake primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
    • If the intake primary and secondary rocker arms move together, go to step 4.
    GHH308402Courtesy of HONDA, U.S.A., INC.
    		 Rear (VTEC) 

    4. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary L and H rocker arms (B) are mechanically connected by the pistons and that the intake primary and secondary L and H rocker arms should move together:

    • If the intake primary and secondary L and H rocker arms move independently, remove the intake primary, secondary L and H rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary, secondary L and H rocker arms as an assembly, then retest.
    • If the intake primary and secondary L and H rocker arms move together, go to step 5.
    GHH308403Courtesy of HONDA, U.S.A., INC.
    		 Rear (VCM) 

    5. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) should move independently of the intake secondary L and H rocker arms (B). The exhaust primary rocker arms (C) should move independently of the exhaust secondary rocker arms (D):

    • If the intake primary, secondary L and H rocker arms do not move independently, remove the intake primary, secondary L and H as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary, secondary L and H as an assembly, then retest.
    • If the exhaust primary and secondary rocker arms do not move independently, remove the exhaust primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the exhaust primary and secondary rocker arms as an assembly, then retest.
    • If the intake primary and secondary L and H rocker arms, and exhaust primary and secondary rocker arms move independently, go to next procedure.
  7. All Special Tools - Remove
  8. Sealing Bolt - Install
    1. Torque the new sealing bolts to 22 N.m (2.2 Kgf-m, 16 lbf.ft).
  9. All Removed Parts - Install
    1. Install the parts in the reverse order of removal.
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