Variable Cylinder Management (VCM) Test: Test

How to use this manual .

NOTICE:  

Use a borescope that meets the following requirements.

• Tip diameter is 9 mm (0.35 in) or less.
• There is lighting at the tip.
• Side shooting is possible.

1. VCM - Test (VCM Inoperative State)

   Preconditions 

   • Spark Plugs Removed

   Figure 1 

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

   Procedure/Specifications 

   NOTICE:  

   Be careful not to drop the borescope accessories inside the cylinder bores.

   1. Refer to figure 1.

   Tool Details (Figure 1) 

   Name
   a	Borescope (Commercially Available)

   Recommended model: Snap-on BK5600 DUAL55

   Figure 2 

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

   2. Rotate the crankshaft pulley clockwise.

   3. Make sure that the valves move. (Figure 2)

   Specifications (Figure 2) 

   Specification
   The valve moves

   Result 

   • If it is abnormal, check that the slide pin in the valve lifter moves smoothly.
2. VCM - Test (VCM Operation State)

   Preconditions 

   • Cylinder Head Cover Area Parts Removed
     • Spark Plugs
     • Rocker Arm Oil Control Valve

   Figure 1 

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

   Procedure/Specifications 

   NOTICE:  

   Be careful not to drop the borescope accessories inside the cylinder bores.

   1. Refer to figure 1.

   Tool Details (Figure 1) 

   Name
   a	Borescope (Commercially Available)

   Recommended model: Snap-on BK5600 DUAL55

   2. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.04 kgf/cm² , 100.1 psi).

   Figure 2 

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

   3. Install the air adapter to the inspection hole, then connect the air pressure regulator as shown. (Figure 2)

   Figure 3 

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

   4. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the valves do not move. (Figure 3)

   Specifications (Figure 3) 

   Condition	Specification
   Apply the 441-490 kPa (4.50-5.00 kgf/cm2 , 64.0-71.1 psi)	The valve does not move

   Result 

   • If it is abnormal, check that the slide pin in the valve lifter moves smoothly.
3. Valve Lifter - Test

   Preconditions 

   • Valve Lifter Removed

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

   Procedure/Specifications 

   • Inspect the slide pin (a). Push on slide pin manually.

   Specifications 

   Object	Specification
   a	Slide pin move smoothly.

   Result 

   • If it is abnormal, replace the valve lifter.