When servicing a VVT issue, take your time and follow the steps.
This video is sponsored by Standard.
VVT isn’t new but it’s also not always understood. This video is sponsored by NGK and NTK.
With VVT, before turning nuts and bolts, be sure to check the oil. This video is sponsored by The Group Training Academy.
Just as with the engine itself, oil is critical to the VVT system. This video is sponsored by The Group Training Academy.
One of the ways automakers squeeze more horsepower and torque from an engine is adding variable valve timing (VVT) to the valvetrain.
Andrew Markel details a case study involving a Honda Accord whose valvetrain displayed a timing malfunction.
The CMP actuator system controls the amount of intake and exhaust valve overlap. The engine control module (ECM) can only command the CMP actuator to advance the valve timing from the park position or retard the valve timing back to the park position.
Variable valve timing is becoming a standard system on most late-model engines because it offers higher performance from a smaller displacement engine at higher rpms. Oil plays a larger role in VVT systems. They need engine oil not only for lubrication, but also to actuate the camshafts to change the profile of the lobes.