VTEC Rocker Arm Test (2.4 L Engine) (2017 2018 2019): Test

Ignition Coil and Spark Plug - Remove
Cylinder Head Cover - Remove

VTEC Rocker Arm - Test

Courtesy of HONDA, U.S.A., INC.

1. Rotate the crankshaft pulley clockwise. Make sure that the intake secondary rocker arm (A), intake primary rocker arm (B), and the intake mid rocker arm (C) are separated and that the intake secondary rocker arm and the intake mid rocker arm should move independently:

If the mid and secondary rocker arms move together, 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.
If the secondary rocker arm moves independently, go to step 2.

2. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.08 kgf/cm 2, 58.0 psi).

3. Inspect the valve clearance

Courtesy of HONDA, U.S.A., INC.

4. Install the VCM air adapter to the inspection hole.

5. Connect the air pressure regulator.

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

Specified Air Pressure:

290 kPa (2.96 kgf/cm 2, 42.1 psi)

Courtesy of HONDA, U.S.A., INC.

7. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The secondary rocker arm (A) should move together with the mid rocker arm (B) and the primary rocker arm (C):

If the mid, primary, and secondary rocker arms move independently, 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, primary, and secondary rocker arms as an assembly, then retest.
If the mid, primary, and secondary rocker arms move together, go to step 8.

8. Remove the air pressure regulator and the VCM air adapter.

All Removed Parts - Install

1. Install the parts in the reverse order of removal.