What is a cam phaser?

A cam phaser, also known as a variable cam timing (VCT) system, is a component of an engine that is responsible for adjusting the timing of the camshaft. This allows for better control over the opening and closing of the engine's valves, which can enhance performance, fuel efficiency, and emissions.

Cam phasers work by using hydraulic pressure to rotate the camshaft in relation to the crankshaft, which changes the timing of the valves. This can optimize engine performance at different speeds and loads, resulting in improved power delivery and efficiency.

Cam phasers are commonly found in modern engines with variable valve timing technology. They are controlled by the engine's computer, which takes into account factors such as engine speed, load, and temperature to determine the optimal camshaft position.

Overall, cam phasers play a crucial role in maximizing the performance and efficiency of an engine, helping to achieve a balance between power, fuel economy, and emissions.