Honda 14310-R5A-305 Variable Valve Timing Actuator (VTC)
Updated June 8, 2026
The Honda 14310-R5A-305 Variable Valve Timing (VTC) Actuator, also known as a camshaft sprocket actuator, is a critical engine component that adjusts camshaft timing on the intake side. It is used on select Honda 2.4L i-VTEC engines in models including Accord, CR-V, Crosstour, and Civic. This genuine OEM part replaces the factory actuator that controls oil pressure to advance or retard cam timing, optimizing power, fuel efficiency, and emissions.
AI-generated content
How It Works
The VTC actuator is a hydraulic cam phaser mounted on the intake camshaft. Engine oil pressure, regulated by the VTC solenoid, pushes a piston inside the actuator to rotate the camshaft relative to the timing chain. This advances or retards valve timing based on RPM and load. The actuator contains a 46-tooth sprocket that drives the timing chain, making it both a phaser and a sprocket in one assembly.
Common Failure Symptoms
A failing VTC actuator often produces a brief rattling noise on cold startup (especially in the morning), caused by oil draining out of the phaser. This may be accompanied by a check engine light with codes P0011 (camshaft timing over-advanced) or P0014 (exhaust side). Performance issues like rough idle, reduced power, and lower fuel economy can also occur. If left unfixed, the actuator can cause timing chain wear or engine damage.
Installation Notes
Replacing the VTC actuator requires removing the timing cover, timing chain, and camshaft sprocket. The actuator bolt must be torqued to factory specs (typically around 85 ft-lbs) using a locking tool to prevent engine rotation. The oil control valve and solenoid should be inspected or replaced at the same time. Always use a new actuator bolt and clean the oil passages. This job is complex and requires specialized tools.
