VTEC Rocker Arm Test

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. Start the engine and let it run for 5 minutes, then turn the ignition switch to LOCK (0).

2. Remove the six ignition coils and the six spark plugs Service and Repair.

3. Remove the cylinder head covers Cylinder Head Cover Removal.

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 intake secondary rocker arm move independently, go to step 5.





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 Adjustments.

7. 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.

FRONT





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

REAR





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






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 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 intake secondary rocker arm move together, go to step 11.





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 Nm (2.2 kg-m, 16 lb-ft).

13. Install the cylinder head covers Cylinder Head Cover Installation.

14. Install the six spark plugs and the six ignition coils Service and Repair.