VTEC Rocker Arm Test

Special Tools Required 

• VCM Air Adapter 070AJ-001A101
• VTEC Air Stop Tool B 07AAJ-R70A200
• Air Pressure Regulator 07AAJ-PNAA101
• VTEC Air Stop Tool A 07AAJ-R70A100

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 separated and that the intake primary rocker arm should move independently:
   • If the intake primary rocker arm and the intake secondary rocker arm move together, 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 Independently, go to step 4.
     Fig 1: Identifying Intake Primary Rocker Arms And Intake Secondary Rocker Arms

     Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Check that the air pressure on the shop air compressor gauge indicates over 981 kPa (10.00 kgf/cm² , 142.3 psi).
5. Inspect the valve clearance (see VALVE CLEARANCE ADJUSTMENT  ).
6. Remove the sealing bolts, then install the VCM air adapter (A) and VTEC air stop tool B to the inspection hole, then connect the air pressure regulator (C) as shown in illustration.

   FRONT 

   Fig 2: Connecting Air Pressure Regulator (Front)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
7. Remove the sealing bolts, then install VTEC air stop tool A and the VCM air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown in illustration.

   REAR 

   Fig 3: Connecting Air Pressure Regulator (Rear)

   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 primary rocker arm (A) should move together with the intake secondary rocker arm (B):
   • If the intake primary rocker arm and the intake secondary rocker arm 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 primary rocker arm and the intake secondary rocker arm move together, go to step 10.
     Fig 4: Identifying Intake Primary Rocker Arms And Intake Secondary Rocker Arms

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