VTEC Rocker Arm Test

Special Tools Required 

• VTEC air stop tool B 07AAJ-R70A200
• VTEC air adapter 070AJ-001A101
• Air pressure regulator 07AAJ-PNAA101
• VTEC air stop tool A 07AAJ-R70A100

1. Start the engine and let it run for 5 minutes, then turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
2. Remove the six spark plugs
3. Remove the cylinder head covers (see TIMING BELT DRIVE PULLEY REPLACEMENT )
4. Rotate the crankshaft pulley clockwise, and visually check all the intake primary rocker arms (A) and the intake secondary rocker arms (B) moves 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 5
   Fig 1: Identifying Intake Primary Rocker And Intake Secondary Rocker Arms

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
5. Check that the air pressure on the shop air compressor gauge indicates over 981 kPa (10.0 kgf/cm² , 142 psi)
6. Inspect the valve clearance (see VALVE CLEARANCE ADJUSTMENT )
7. Remove the sealing bolts, then install the VTEC air stop tool B (A) and the VTEC air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown

   FRONT 

   Fig 2: Connecting Air Pressure Regulator - Front

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
8. Remove the sealing bolts, then install the VTEC air stop tool A (A) and the VTEC air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown
   Fig 3: Connecting Air Pressure Regulator - Rear

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

   Specified Air Pressure 

   550-690 kPa (5.6-7.0 kgf/cm ²  , 80-100 psi) 

10. With the specified air pressure applied, rotate the crankshaft pulley clockwise, and visually check all the intake primary rocker arms (A) and the intake secondary rocker arms (B) move together
    • 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 11
    Fig 4: Identifying Intake Primary Rocker And Intake Secondary Rocker Arms

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. Remove the air pressure regulator, the VTEC air adapter, the VTEC air stop tool A, and the VTEC air stop tool B
12. Tighten 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