Wells 3T1003 Engine Variable Valve Timing (VVT) Sprocket

The Wells 3T1003 is a Variable Valve Timing (VVT) Sprocket—also known as a VVT actuator or cam phaser—a toothed wheel mounted on the camshaft that optimizes engine performance and efficiency. This precision component generally consists of two parts: the camshaft timing sprocket and a second part that moves independently of the sprocket.

How It Works:

After the VVT solenoid sends additional oil pressure to the VVT Sprocket, the actuator is able to advance or retard the timing of the camshaft, allowing for finer adjustments of the intake and exhaust valves. These minute adjustments to the valves, which control the flow of combustible fuel and spent gasses in and out of the combustion chamber, can help decrease vehicle emissions and improve fuel economy.

Quality Engineering:

Wells VVT Sprockets are engineered and thermal-shock tested to match OE parts in fit, form and function. The VVT Sprocket is located on the end of the intake and exhaust camshafts. Each component is manufactured to ensure fast, easy installation and superior performance.

Signs of Failure:

• Loud rattling or clattering sounds, especially at cold start
• Check engine light illumination
• Decreased engine performance or fuel economy
• Rough idle or engine hesitation