VTEC Rocker Arm Test (PZEV Models)

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 (PZEV Models).

3. Intake side: Rotate the crankshaft pulley clockwise. Make sure that the intake secondary rocker arm (A) and the intake mid rocker arm (B) are separated 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 move independently, go to step 4.





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

- If the secondary and primary rocker arms move together, remove the 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 primary and secondary rocker arms as an assembly, then retest.
- If the secondary rocker arm move independently, go to step 5.





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

6. Inspect the valve clearance Valve Clearance Adjustment (PZEV Models).

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





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

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

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






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

- If the mid, primary, and secondary rocker arms move independently, 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 mid, primary, and secondary rocker arms move together, go to step 12.





12. Exhaust side: With the specified air pressure applied, rotate the crankshaft pulley clockwise. The exhaust secondary rocker arm (A) should move together of the exhaust primary rocker arm (B):

- If the primary and secondary rocker arms move independently, remove the 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 primary and secondary rocker arms as an assembly, then retest.
- If the primary and secondary rocker arms move together, go to step 13.





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

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

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

16. Install the cylinder head cover Cylinder Head Cover Installation (PZEV Models).

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