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Home >> Kia >> 2020 >> Optima EX Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 48 (Cylinder Head Assembly - 2.4L (Except HEV)) >> CVVT & Camshaft >> Repair Procedures >> Inspection >> CVVT Assembly

CVVT Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Inspect the CVVT for smooth rotation.
    1. Clamp the camshaft using a vise. Be careful not to damage the cam lobes and journals in the vise.
    2. Check that the CVVT is locked by turning it clockwise or counterclockwise. It must not rotate.
    3. Exhaust CVVT: Seal one of the two retard holes in the camshaft journal with tape.

      [Exhaust] 

      G12932343Courtesy of KIA MOTORS AMERICA, INC.
    4. Exhaust CVVT: Apply approx. 150 kPa (1.5 kgf/cm2 , 21 psi) of compressed air into the unsealed retard hole to release the lock.

      Information 

      Cover the oil paths with a piece of cloth when applying compressed air to prevent oil from spraying.

    5. Exhaust CVVT: With compressed air applied, rotate the CVVT into the retard direction (clockwise) and check that the CVVT turns smoothly.

      CVVT phasing range 

      Exhaust: 22.5°±1° (from the most advanced position to the most retarded position)

      G12932344Courtesy of KIA MOTORS AMERICA, INC.
    6. Exhaust CVVT: Rotate the CVVT into the most advanced position (counterclockwise) and then check that the CVVT is locked.
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