VTEC Rocker Arm Test

VTEC Rocker Arm Test

Special Tools Required

- 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). Adjustments

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

- If the intake secondary rocker arm A does not move independently, remove the secondary rocker arms as an assembly, then check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the primary and the secondary rocker arms as an assembly, then retest.

5. Repeat step 4 on the remaining intake 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. Install a 10 x 1.0 mm adapter to the inspection hole, then connect the air pressure regulator.

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

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






10. With the specified air pressure applied, move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A and secondary rocker arm B should move together.
- If the secondary rocker arm A and the secondary rocker arm B move together, go to step 11.

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

11. Repeat step 10 on the remaining secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 12.

12. Remove the air pressure regulator and the 10 x 1.0 mm adapter.

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