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Home › Honda › 2012 › Fit Base, Automatic Trans › Repair and Diagnosis › Engine Mechanical › Mechanical › Cylinder Head › VTEC Rocker Arm Test › Special Tools Required

Special Tools Required

  1. Remove the cylinder head cover (see CYLINDER HEAD COVER REMOVAL  ).
  2. Rotate the crankshaft pulley clockwise. Make sure that the primary rocker arm (A) and the secondary rocker arm (B) are separated and that the primary rocker arm should move independently.
    • If the primary rocker arm and the secondary rocker arm move together, remove the primary rocker arm and the secondary rocker arm as an assembly, and check that the pistons in the primary and secondary rocker arms move smoothly (see ROCKER ARM AND SHAFT INSPECTION ). If any rocker arm needs replacing, replace the rocker arm set, then retest.
    • If all the primary rocker arms and secondary rocker arms move freely, go to step 3.
      Fig 1: Identifying Primary Rocker Arms & Secondary Rocker Arms
      G05952455Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.08 kgf/cm2 , 58.0 psi).
  4. Inspect the valve clearance (see step 7 VALVE CLEARANCE ADJUSTMENT  ).
  5. Install the VCM air adapter (A) to the inspection hole, then connect the air pressure regulator (B) as shown below.
    Fig 2: Identifying VTEC Air Adapter & Air Pressure Regulator
    G05952456Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Loosen the valve on the regulator, and apply the specified air pressure.

    Specified Air Pressure: 

    340 kPa (3.47 kgf/cm 2  , 59.3 psi) 

  7. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The primary rocker arm (A) should move together with the secondary rocker arm (B):
    • If the primary rocker arm and the secondary rocker arm move independently of each other, remove the primary rocker arm and the secondary rocker arm as an assembly, and check that the pistons in the primary and secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the rocker arm set, then retest. (see ROCKER ARM AND SHAFT INSPECTION ). If any rocker arm needs replacing, replace the rocker arm set, then retest.
    • If all the primary rocker arms and the secondary rocker arms move together, go to step 8.
    Fig 3: Identifying Primary Rocker Arms & Secondary Rocker Arms
    G05952457Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Remove the air pressure regulator and the VCM air adapter.
  9. Install the cylinder head cover (see CYLINDER HEAD COVER INSTALLATION  ).
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