VTEC Rocker Arm Test

VTEC Rocker Arm Test

Special Tools Required

- Air pressure regulator 07AAJ-PNAA101
- Gauge joint adapter 07LAK-PR3A101
- VTEC air adapter (2) 07ZAJ-PNAA100
- Air joint adapter 07ZAJ-PNAA300
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).. Adjustments

4. Move the secondary rocker arm (A) for No. 1 cylinder. The secondary rocker arm should move independently of the mid rocker arm (B).
- If the secondary rocker arm moves independently of the mid rocker arm, go to step 5.

- If the secondary rocker arm does not move, remove the mid, primary, and secondary rocker arms as an assembly, and check that the pistons in the mid and primary 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 on the remaining 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 indicator is over 400 kPa (4 kgf/cm2, 57 psi).

7. Inspect the valve clearance. Adjustments






8. Remove the No. 3 and No. 4 camshaft holder bolts, and install the VTEC air adapters (A) finger-tight.

9. Install the gauge joint adapter (B) to the inspection hole (C).

10. Connect the air joint adapter (D) to the VTEC air adapters.

11. Connect the air pressure regulator (E) to the air joint adapter.

12. Loosen the valve on the regulator, then apply the specified air pressure.

Specified Air Pressure:
290 kPa (3.0 kgf/cm2, 42 psi)

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






13. With the specified air pressure applied and the piston at TDC, move the secondary rocker arm (A). The mid rocker arm (B), the primary rocker arm (C), and the secondary rocker arm should move together.
- If the three rocker arms move together, go to step 14.

- If the three rocker arms do not move together, remove the mid, primary, and secondary rocker arms an assembly, and check that the pistons in the mid and primary rocker arms move smoothly. If rocker arm needs replacing, replace the mid, primary, and secondary rocker arms as an assembly, then retest.

14. Repeat step 13 on the remaining rocker arms with each piston at TDC. When all the rocker arms pass the test, go to step 15.

15. Remove the air pressure regulator, the air joint adapter, the gauge joint adapter, and the VTEC air adapters.

16. Tighten the camshaft holder bolts to 22 N-m (2.2 kgf-m, 16 lbf-ft).

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