Variable Cylinder Management Rocker Arm Test (J35A7)

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 spark plugs.

3. Remove the cylinder head covers Cylinder Head Cover Removal (J35A7).

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 secondary 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. If necessary repeat steps 4 and 5 for the other cylinders. When the rocker arms pass the test, go to step 7.

7. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.0 kgf/cm2, 100 psi).

8. Inspect the valve clearance Valve Clearance Adjustment (J35A7).

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

FRONT





REAR





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






11. 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 secondary rocker arms as an assembly, then retest.
- If the intake secondary rocker arm move independently, go to step 12.





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

- If the exhaust secondary 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 secondary rocker arms as an assembly, then retest.
- If the exhaust secondary rocker arm moves independently, go to step 13.





13. If necessary repeat steps 11 and 12 for the other cylinders. When the rocker arms pass the test, go to step 14.

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

15. Torque the sealing bolts to 22 Nm (2.2 kg-m, 16 lb-ft).

16. Install the cylinder head covers Cylinder Head Cover Installation (J35A7).

17. Install the six spark plugs.