| VELOSTER(FS) >2013 > G 1.6 T-GDI > Engine Mechanical System > Cylinder Head Assembly > CVVT Assembly>Repair procedures |

Removal
1. | Remove the cylinder heae cover. (Refer to Cylinder Heae Assembly - "Cylinder Heae Cover")
2. | Remove the timing chain cover. (Refer to Timing System - "Timing Chain Cover")
3. | Remove the timing chain. (Refer to Timing System - "Timing Chain")
4. | Remove the intake CVVT assembly (A) and exhaust CVVT assembly (B).
When removing the CVVT assembly bolt, prevent the camshaft from rotating by using a wrench at position (A).
Inspection
Continuous Variable Valve Timing (CVVT) Assembly
1. | Inspect the Continuous variable valve timing (CVVT) assembly.
(1) | Fix the Continuous variable valve timing (CVVT ) with its camshaft in a vice.
(2) | Check that the CVVT assembly will not turn. If it is not turned, it is in normal condition.
(3) | Apply vinyl tape to all the parts except the one hole.
(4) | Using an air gun, apply the pressure, 147.10kpa (1.5kg/cm², 21.33psi) in the hole. This makes the lock pin in maximum retarded state released.
• | Using an air gun, apply the pressure, 147.10kpa (1.5kg/cm², 21.33psi) in the hole. This makes the lock pin in maximum retarded state released.
• | After releasing the pin, you can turn the CVVT assembly for advance by hand.
• | If there was too much air leakage, the pin can not be released.
(5) | Under the condition of 3), turn the CVVT assembly to the advance angle side with your hand. Depending on the air pressure, the CVVT assembly will turn to the advance side. Also, if the air pressure that was applied was insufficient because of the air leakage from the port, the lock pin may not release properly.
(6) | Except the position where the lock pin meets at the maximum delay angle, let the CVVT assembly turn back and forth and check the movable range and that there is no interference. Standard : Movable smoothly in the range about 25°
(7) | Turn the CVVT assembly with your hand counterclockwise and lock it at the maximum delay angle position.
Installation
1. | Install the intake CVVT assembly (A) and exhaust CVVT assembly (B).
Tightening torque : 63.7 ~ 73.5N.m (6.5 ~ 7.5kgf.m, 47.0 ~ 54.2lb-ft)
When installing the CVVT assembly bolt, prevent the camshaft from rotating by using a wrench at position (A).
2. | Install the timing chain. (Refer to Timing System - "Timing Chain")
3. | Install the timing chain cover. (Refer to Timing System - "Timing Chain Cover")
4. | Install the cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover")