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

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

3. Set the No. 1 piston at top dead center (TDC) Testing and Inspection.

4. Move the secondary rocker arm (A) for the No. 1 cylinder. The secondary rocker arm should move independently of the mid rocker arm (B).

- If the secondary rocker arm moves freely, go to step 5.
- If the secondary rocker arm does not 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.





5. Repeat step 4 VTEC Rocker Arm Test on the remaining secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 6.

6. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.0 kgf/cm2, 57 psi).

7. Inspect the valve clearance Adjustments.

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





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

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

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





NOTE: If the rocker arm piston does not move after applying air pressure; move the rocker arm up and down manually by rotating the crankshaft clockwise.

12. With the specified air pressure applied, move the secondary rocker arm (A) for the No. 1 cylinder. The mid rocker arm (B), the primary rocker arm (C), and the secondary rocker arm should move together.

- If the mid, primary, and secondary rocker arms move together, go to step 13.
- If the mid and primary rocker arms do not move together with the secondary rocker arm, 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, the primary, and the secondary rocker arms as an assembly, then retest.





13. Repeat step 12 VTEC Rocker Arm Test on the remaining secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 14.

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

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

16. Tighten the sealing bolt to 10 Nm (1.0 kg-m, 7.2 lb-ft).

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