Some Honda CR-V owners report experiencing a rattling noise at startup during cold weather, often linked to the VTC actuator and the timing chain tensioner. The VTC actuator may run dry overnight, causing the noise due to oil drainage, and replacing it can help resolve this issue. Additionally, a worn or malfunctioning timing chain tensioner can contribute to the rattling sound, and its replacement may also be necessary to reduce the noise. It is crucial for owners to address these problems promptly to prevent further engine damage and ensure a smoother driving experience. Consulting a qualified mechanic for inspection and necessary replacements is advisable for those experiencing these symptoms.
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