VTEC Rocker Arm Test: Test

How to use this Service Information .

1. VTEC Rocker Arm - Test (VTEC Inoperative State)

   ■ Preconditions 

   • Cylinder Head Cover Removed

   ■ Procedure/Specifications 

   1. Rotate the crankshaft pulley clockwise.

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

   2. Make sure that the secondary rocker arm (A), the primary rocker arm (B), and the mid rocker arm (C) are separated and that the secondary rocker arm and the mid rocker arm moves independently.

   Normal conditions 

   Rocker arms separated and should move independently

   ■ Result 

   • If it is abnormal, check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the rocker arm assembly .
2. VTEC Rocker Arm - Test (VTEC Operation State)

   ■ Preconditions 

   • Cylinder Head Cover Removed

   ■ Procedure/Specifications 

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

   2. Inspect the valve clearance - Refer to: Valve Inspection 

   3. Install the VCM air adapter to the inspection hole, then connect the air pressure regulator. (Figure 1)

   Figure 1 

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   4. 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)

   5. With the specified air pressure applied, rotate the crankshaft pulley clockwise.

   Figure 2 

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

   6. Make sure that the secondary rocker arm (A) moves together with the mid rocker arm (B) and the primary rocker arm (C). (Figure 2)

   Normal conditions 

   Rocker arms should move together

   Result 

   • If it is abnormal, check that the pistons in the rocker arms move smoothly. If any rocker arm needs replacing, replace the rocker arm assembly .