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HOMESERVICE MANUALSACURA2015RDX AWDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM & ENGINE MECHANICAL - TESTING & TROUBLESHOOTINGTESTINGVARIABLE CYLINDER MANAGEMENT ROCKER ARM TEST (2013-15)TEST
2015 Acura RDX AWD

Variable Cylinder Management Rocker Arm Test (2013-15): Test

2015 Acura RDX AWDSECTION Test
  1. Cylinder Head Cover - Remove
      1. Remove the cylinder head covers .
  2. VTEC Rocker Arm - Test
    GHH72765Courtesy of HONDA, U.S.A., INC.
    		 1. 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 2.
    GHH72766Courtesy of HONDA, U.S.A., INC.
    		 2. 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 3.

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

    4. Inspect the valve clearance .

    5. 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 

    GHH72767Courtesy of HONDA, U.S.A., INC.

    REAR 

    GHH72768Courtesy of HONDA, U.S.A., INC.

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

    Specified Air Pressure:
    550-690 kPa (5.61-7.04 kgf/cm2, 79.8-100.1 psi)
    GHH72769Courtesy of HONDA, U.S.A., INC.
    		 7. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The intake secondary rocker arm (A) should move independently with 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 8.
    GHH72770Courtesy of HONDA, U.S.A., INC.
    		 8. With the specified air pressure applied, rotate the crankshaft pulley clockwise. The exhaust secondary rocker arm (A) should move independently with 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 9.

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

    10. Torque the sealing bolts to 22 N.m (2.2 kgf.m, 16 lbf.ft).
  3. Cylinder Head Cover - Install
      1. Install the cylinder head covers .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.