Variable Cylinder Management Rocker Arm Test

Special Tools Required 

• VCM Air Adapter 070AJ-001A101
• VTEC Air Stop Tool B 07AAJ-R70A200
• Air Pressure Regulator 07AAJ-PNAA101

1. Remove the six ignition coils and the six spark plugs (see IGNITION COIL AND SPARK PLUG REMOVAL/INSTALLATION ).
2. Remove the cylinder head covers (see CYLINDER HEAD COVER REMOVAL  ).
3. 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 rocker arm and the intake secondary rocker arm should move together:
   • If the intake secondary rocker arm moves independently, remove the intake primary rocker arm and the intake secondary rocker arm 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 rocker arm and the intake secondary rocker arm move together, go to step 4.
     Fig 1: Moving Intake Primary Rocker Arm With Intake Secondary Rocker Arm

     Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Rotate the crankshaft pulley clockwise. Make sure that the exhaust primary rocker arm (A) and the exhaust secondary rocker arm (B) are mechanically connected by the pistons and that the exhaust primary rocker arm and the exhaust secondary rocker arm should move together:
   • If the exhaust secondary rocker arm moves independently, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
   • If the exhaust primary rocker arm and the exhaust secondary rocker arm move together, go to step 5.
     Fig 2: Moving Exhaust Primary Rocker Arm With Exhaust Secondary Rocker Arm

     Courtesy of AMERICAN HONDA MOTOR CO., INC.
5. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.04 kgf/cm² , 100.1 psi).
6. Inspect the valve clearance (see VALVE CLEARANCE ADJUSTMENT  ).
7. 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.

   FRONT 

   Fig 3: Identifying Air Pressure Regulator Connection With VCM Air Adapter (FRONT)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   REAR 

   Fig 4: Identifying Air Pressure Regulator Connection With VCM Air Adapter (FRONT)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
8. Loosen the valve on the regulator, and apply the specified air pressure.

   Specified Air Pressure: 

   550-690 kPa (5.61-7.04 kgf/cm ²  , 79.8-100.1 psi) 

9. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The intake secondary rocker arm (A) should move independently with the intake primary rocker arm (B):
   • If the intake secondary rocker arm does not move independently, remove the intake primary rocker arm and the intake secondary rocker arm 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 secondary rocker arm move independently, go to step 10.
     Fig 5: Moving Intake Secondary Rocker Arm With Intake Primary Rocker Arm

     Courtesy of AMERICAN HONDA MOTOR CO., INC.
10. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The exhaust secondary rocker arm (A) should move independently with the exhaust primary rocker arm (B):
    • If the exhaust secondary rocker arm does not move independently, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
    • If the exhaust secondary rocker arm moves independently, go to step 11.
      Fig 6: Moving Exhaust Secondary Rocker Arm With Exhaust Primary Rocker Arm

      Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. Remove the air pressure regulator, VTEC air stop tool B, and the VCM air adapter.
12. Torque the sealing bolts to 22 N.m (2.2 kgf.m, 16 lbf.ft).
13. Install the cylinder head covers (see CYLINDER HEAD COVER INSTALLATION  ).
14. Install the six spark plugs and the six ignition coils (see IGNITION COIL AND SPARK PLUG REMOVAL/INSTALLATION ).