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Home >> Honda >> 2017 >> Accord LX, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System & Engine Mechanical - Testing & Troubleshooting (Except Hybrid) >> Testing >> VTEC Rocker Arm Test (L4) >> Test

VTEC Rocker Arm Test (L4): Test

  1. Ignition Coil and Spark Plug - Remove

    Remove the four ignition coils and the four spark plugs - Refer to: Ignition Coil and Spark Plug Removal and Installation (L4) .

  2. Cylinder Head Cover - Remove

    Remove the cylinder head cover - Refer to: Cylinder Head Cover Removal and Installation (L4) (2013), or Cylinder Head Cover Removal and Installation (L4) (2014-17) .

  3. VTEC Rocker Arm - Test
    GHH60076Courtesy of HONDA, U.S.A., INC.
    		 1. Rotate the crankshaft pulley clockwise. Make sure that the intake secondary rocker arm (A), intake primary rocker arm (B), and the intake mid rocker arm (C) are separated and that the intake secondary rocker arm and the intake mid rocker arm should move independently:
    • If the mid, primary and secondary rocker arms move together, remove the mid, primary, and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the mid, primary, and secondary rocker arms as an assembly, then retest.
    • If the secondary rocker arm moves independently, go to step  2.

    2. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4. 08 kgf/cm2 , 58. 0 psi).

    1. Inspect the valve clearance - Refer to: Valve Clearance Adjustment (V6),  or Valve Clearance Adjustment (L4) .
    GHH60077Courtesy of HONDA, U.S.A., INC.
    		 4. Install the VCM air adapter (A) to the inspection hole

    5. Connect the air pressure regulator (B)

    6. Loosen the valve on the air pressure regulator, and apply the specified air pressure.
    Specified Air Pressure: 
    290 kPa (2. 96 kgf/cm 2  , 42. 1 psi) 
    GHH60078Courtesy of HONDA, U.S.A., INC.
    		 7. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The secondary rocker arm (A) should move together with the mid rocker arm (B) and the primary rocker arm (C):
    • If the mid, primary, and secondary rocker arms move independently, remove the mid, primary, and the secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the mid, primary, and secondary rocker arms as an assembly, then retest.
    • If the mid, primary, and secondary rocker arms move together, go to step 8.

    8. Remove the air pressure regulator and the VCM air adapter.
  4. Cylinder Head Cover - Install

    Install the cylinder head cover - Refer to: Cylinder Head Cover Removal and Installation (L4) (2013), or Cylinder Head Cover Removal and Installation (L4) (2014-17) .

  5. Spark Plug and Ignition Coil - Install

    Install the four spark plugs and the four ignition coils - Refer to: Ignition Coil and Spark Plug Removal and Installation (L4) .

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