Check 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.
- Remove the CVVT assembly. Refer to CVVT & CAMSHAFT .
- Check that the CVVT assembly is locked.
- One of the 2 holes on the cam journal is for advances (upper) and the rest is for retards (lower). Apply masking tape to all oil path holes except the one advance hole ("B") indicated by the arrow as displayed in image.
- To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure of approx. 150kPa (1.5kg/cm2 , 21 psi) to the exposed camshaft port. Wrap a shop towel or rag around the CVVT because residual oil may leak out of the unit when applying air pressure.
- With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the image.CAUTION: If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.
- Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves freely. (Movable smoothly in the range about 20°)
- Turn the CVVT by hand and make sure it locks in the maximum delay angle position.
- Is CVVT assembly working properly?
YES
- Operate engine to check for DTC resetting. If okay, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Replace the CVVT assembly and go to "VERIFICATION OF VEHICLE REPAIR " procedure.