VTEC Rocker Arm Test

VTEC Rocker Arm Test

Special Tools Required

- VTEC Air Stop Tool B 07AAJ-R70A200
- VCM 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.

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.





5. Rotate the crankshaft pulley clockwise, and visually check all the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) move independently.

- If the exhaust primary rocker arm and the exhaust primary rocker arm move together, 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 independently, go to step 6.





6. Check that the air pressure on the shop air compressor gauge indicates over 981 kPa (10.0 kgf/cm2, 142 psi).

7. Inspect the valve clearance.

8. Remove the sealing bolts, then install the VTEC air stop tool B (A) and the VCM air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown.






9. Remove the sealing bolts, then install the VTEC air stop tool A (A) and the VCM air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown.





10. Loosen the valve on the regulator, and apply the specified air pressure.






11. 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 12.





12. With the specified air pressure applied, rotate the crankshaft pulley clockwise, and visually check all the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) move together.

- If the exhaust primary rocker arm and the exhaust secondary rocker arm 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 primary rocker arm and the exhaust secondary rocker arm move together, go to step 13.





13. Remove the air pressure regulator, the VCM air adapter, the VTEC air stop tool A, and the VTEC air stop tool B.

14. Torque the sealing bolts to 22 Nm (2.2 kg-m, 16 lb-ft).

15. Install the cylinder head covers.

16. Install the six spark plugs.