Variable Cylinder Management Rocker Arm Test

Variable Cylinder Management Rocker Arm Test

Special Tools Required

- VCM Air Adapter 070AJ-001A101
- VTEC Air Stop Tool B 07AAJ-R70A200
- 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 six ignition coils and the six spark plugs Service and Repair.

3. Remove the cylinder head covers Cylinder Head Cover Removal.

4. Rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary rocker arm (B) are mechanically connected by the pistons and that the intake primary rocker arm and the intake secondary rocker arm should move together.

- If the intake secondary rocker arm moves independently, remove the intake primary rocker arm and the intake secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
- If the intake primary rocker arm and the intake secondary rocker arm move together, go to step 5.





5. Rotate the crankshaft pulley clockwise. Make sure that the exhaust primary rocker arm (A) and the exhaust secondary rocker arm (B) are mechanically connected by the pistons and that the exhaust primary rocker arm and the exhaust secondary rocker arm should move together.

- If the exhaust primary rocker arm moves independently, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
- If the exhaust primary rocker arm and the exhaust secondary rocker arm move together, go to step 6.





6. Check that the air pressure on the shop air compressor gauge indicates over 689 kPa (7.0 kgf/cm2, 100 psi).

7. Inspect the valve clearance Adjustments.

8. Remove the sealing bolt, then install the VCM air adapter (A) to the inspection hole and install VTEC air stop tool B, then connect the air pressure regulator (C) as shown.

FRONT





REAR





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






10. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The intake secondary rocker arm (A) should move independently of the intake primary rocker arm (B).

- If the intake secondary rocker arm does not move independently, remove the intake primary rocker arm and the intake secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and the secondary rocker arms as an assembly, then retest.
- If the intake secondary rocker arm moves independently, go to step 11.





11. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The exhaust primary rocker arm (A) should move independently of the exhaust secondary rocker arm (B).

- If the exhaust primary rocker arm does not move independently, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the primary and the secondary rocker arms as an assembly, then retest.
- If the exhaust primary rocker arm moves independently, go to step 12.





12. Remove the air pressure regulator, the VCM air adapter, and the VTEC air stop tool B.

13. Tighten the sealing bolt to 22 Nm (2.2 kg-m, 16 lb-ft).

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

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