How to Determine if the VVT Timing Gear is Good or Bad?

[LaDelaney]

With the engine turned off, open the upper cover of the valve chamber, then use a wrench to rotate the camshaft and observe if the VVT actuator shows any angular offset. If there is no offset, it indicates no problem; otherwise, any rotation suggests damage. Below is more detailed information: 1. Certain principles should be followed when repairing faults in the VVT gear. First, check if the timing is correct. Since VVT technology is developed based on basic timing, the basic timing usually does not have issues. Next, inspect whether the engine oil circuit is malfunctioning, which could prevent the VVT from operating normally. 2. If the VVT mechanism is found to be faulty, it is best to have it repaired or replaced directly at a 4S shop. When the VVT is faulty, the engine idle becomes unstable, fuel consumption increases, and the engine may suffer some damage. Therefore, timely repairs are necessary to avoid accidents.