VTEC Rocker Arm Test

VTEC Rocker Arm Test

Special Tools Required

- VTEC Air Stopper 07ZAJ-PNAA200
- VTEC Air Adapter 07ZAJ-PNAA101 (2)
- Air Joint Adapter 07ZAJ-PNAA300
- Air Pressure Regulator 07AAJ-PNAA101

1. Remove the four ignition coils and the four spark plugs Service and Repair.

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

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

- If the mid and secondary rocker arms move together, remove the mid, primary, and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the mid, primary, and secondary rocker arms as an assembly, then retest.
- If the secondary rocker arm moves independently, go to step 4.





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

5. Inspect the valve clearance Adjustments.

6. Remove the sealing bolt (A) from the relief hole, and install the VTEC air stopper (B).





7. Remove the No. 2 and No. 3 camshaft holder bolts, and install the VTEC air adapters (C) finger-tight.

8. Connect the air joint adapter (D) and the air pressure regulator (E).

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






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

- If the mid, primary, and secondary rocker arms move independently, remove the mid, primary, and the secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the mid, primary, and secondary rocker arms as an assembly, then retest.
- If the mid, primary, and secondary rocker arms move together, go to step 11.





11. Remove the air pressure regulator, the air joint adapter, the VTEC air adapters, and the VTEC air stopper.

12. Torque the camshaft holder mounting bolts to 22 Nm (2.2 kg-m, 16 lb-ft).

13. Torque the sealing bolt to 10 Nm (1.0 kg-m, 7.4 lb-ft).

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

15. Install the four spark plugs and the four ignition coils Service and Repair.