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Home >> Honda >> 2001 >> Odyssey Cargo >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.5L V6 Engine >> Cylinder Head >> VTEC Rocker Arm Test >> 2002-2004 Models

2002-2004 Models

  1. Remove the cylinder head cover (see Cylinder Head Cover Removal  ).
  2. Set the No. 1 piston at TDC (see step 2 on Valve Clearance Adjustment  ).
  3. Push on the intake mid rocker arm (A) for the No. 1 cylinder. The mid rocker arm should move independently of the primary rocker arm (B) and secondary rocker arm (C).
    • If the intake mid rocker arm does not move, remove the mid, primary, and secondary intake rocker arms as an assembly, and check that the pistons in the mid and primary rocker arms move smoothly.

      If any rocker arm needs replacing, replace the primary, mid and secondary rocker arms as an assembly, and retest.

    • If the mid rocker arm moves freely, go to step
    Fig 1: Pushing Intake Mid Rocker Arm
    G01505086Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Repeat step  3 on the remaining intake mid rocker arms with each piston at TDC. When all the mid rocker arms pass the test, go to step 5.
  5. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.0kgf/cm2 , 100 psi).
  6. Inspect the valve clearance (see Valve Clearance Adjustment  ).
  7. Remove the two end intake rocker shaft mounting bolts, then install and connect the special tools as shown.
    Fig 2: Removing Two End Intake Rocker Shaft Mounting Bolts (Front)
    G01505087Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 3: Removing Two End Intake Rocker Shaft Mounting Bolts (Rear)
    G01505088Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Loosen the valve on the regulator, and apply the specified air pressure.

    Specified Air Pressure: 390 kPa (4.0 kgf/cm 2  ,57 psi) 

    NOTE: If the synchronizing pistons A and B do not move after applying air pressure, move the primary or secondary rocker arm up and down manually.
  9. Make sure that the intake primary rocker arm (A) and intake secondary rocker arm (B) are mechanically connected by the piston and that the mid rocker arm (C) does not move when pushed manually. If any intake mid rocker arm moves independently of the primary and secondary rocker arms, replace the rocker arms as a set.
    Fig 4: Making Sure Intake Primary Rocker Arm & Intake Secondary Arm Are Mechanically Connected By Piston
    G01505089Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Remove the tools.
  11. Tighten the rocker shaft bolts to 24 N.m (2.4 kgf.m, 17 lbf-ft)
  12. Install the cylinder head covers (see Cylinder Head Cover  ).
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