CVVT (Continuously Variable Valve Timing) Assembly

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.

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. Intake CVVT: Seal one of the two advance holes in the camshaft journal with tape.
  Exhaust CVVT: Seal one of the two retard holes in the camshaft journal with tape.
4. Intake CVVT: Apply approx. 150kPa (1.5kgf/cm, 21psi) of compressed air into the unsealed advance hole to release the lock.
  Exhaust CVVT: Apply approx. 150kPa (1.5kgf/cm, 21psi) of compressed air into the unsealed retard hole to release the lock.
  NOTE:
  - Cover the oil paths with a piece of cloth when applying compressed air to prevent oil from spraying.
5. Intake CVVT: With compressed air applied, rotate the CVVT into the advance direction (counterclockwise) within its phasing range and check that the CVVT turns smoothly.
  Exhaust CVVT: With compressed air applied, rotate the CVVT into the retard direction (clockwise) and check that the CVVT turns smoothly.
6. Intake CVVT: Rotate the CVVT into the most retarded position (clockwise) and then check that the CVVT is locked.
  Exhaust CVVT: Rotate the CVVT into the most advanced position (counterclockwise) and then check that the CVVT is locked.