CVVT (Continuous Variable Valve Timing) Assembly

Inspect the CVVT (Continuous Variable Valve Timing) assembly.
1. Check that the CVVT (Continuous Variable Valve Timing) assembly will not turn.
2. Apply vinyl tape to all the parts except the one indicated by the arrow in the illustration.
  
  Fig 1: Vinyl Tape Application
  Courtesy of KIA MOTORS AMERICA, INC.
3. To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure (about 14 psi) to the exposed camshaft port.
  NOTE: Wrap a shop towel or rag around the CVVT because residual oil may leak out of the unit when applying air pressure.
4. With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the illustration.
  - With the low air pressure applied, the CVVT should turn to the ADVANCE side.
  - If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.
    
    Fig 2: Illustrating CVVT Turning Direction
    Courtesy of KIA MOTORS AMERICA, INC.
5. Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves freely.
  Standard: Movable smoothly in the range about 20°
6. Turn the CVVT by hand and make sure it locks in the maximum delay angle position.