Variable Cylinder Management Rocker Arm Test
Variable Cylinder Management Rocker Arm TestSpecial Tools Required
^ Air pressure regulator 07AAJ-PNAA101
^ VCM air adapter 07AAJ-RYPA100
1. Remove the front and rear ignition coils and spark plugs.
2. Remove the rear cylinder head cover.
3. At the steering pump pulley, rotate the engine clockwise with a 19 mm wrench; watch the rear bank intake and exhaust rocker arms open and close through a full rotation.
^ If any of the rear bank rocker arms are disengaged, remove the rocker arm assembly, and inspect the rocker arms and shafts.
^ If the rocker arms are functioning normally, go to step 4.
4. Install the VCM air adapter (A) into the inspection hole (B), and then connect the air pressure regulator (C) to the adapter.
5. Connect the air pressure to the regulator and adjust the pressure to 345 kPa (3.5 kgf/cm2, 50 psi).
6. Rotate the engine clockwise with a 19 mm wrench; watch the rear bank intake and exhaust rocker arms through a full rotation. The rocker arms should be disengaging as the pistons in the rear bank go past TDC.
^ If any of the rear bank rocker arms are engaged, remove the rocker arm assembly, and inspect the rocker arms and shafts.
^ If the entire rear bank rocker arms are disengaged, the system is OK.
7. Remove the air pressure regulator and adapter.
8. Install the cylinder head cover.
9. Install the spark plugs and ignition coils.