VTEC Rocker Arm Test

VTEC Rocker Arm Test

Special Tools Required

- Air Pressure Regulator 07AAJ-PNAA101
- VCM Air Adapter 070AJ-001A101

1. Remove the cylinder head cover Cylinder Head Cover Removal.

2. Rotate the crankshaft pulley clockwise. Make sure that the primary rocker arm (A) and the secondary rocker arm (B) are separated and that the primary rocker arm should move independently:

- If the primary rocker arm and the secondary rocker arm move together, remove the primary rocker arm and the secondary rocker arm as an assembly, and check that the pistons in the primary and secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the rocker arm set, then retest.
- If all the primary rocker arms and the secondary rocker arms move independently, go to step 3.





3. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.08 kgf/cm2, 58.0 psi).

4. Inspect the valve clearance Adjustments.

5. Install the VCM air adapter (A) to the inspection hole, then connect the air pressure regulator (B) as shown.





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

Specified Air Pressure





7. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The primary rocker arm (A) should move together with the secondary rocker arm (B):

- If the primary rocker arm and the secondary rocker arm move independently of each other, remove the primary rocker arm and the secondary rocker arm as an assembly, and check that the pistons in the primary and secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the rocker arm set, then retest.
- If all the primary rocker arms and the secondary rocker arms move together, go to step 8.





8. Remove the air pressure regulator and the VCM air adapter.

9. Install the cylinder head cover Cylinder Head Cover Installation.