溫車時"磁磁聽"

you car no problem
when cold engine start, it run fast idle like 2K rpm, the engine vibration with high frequency through the engine mounting and body chassis to your car meter- dash panel and the front door lining trim, se se sound will be heard, once the idle speed gradually drop down, the engine frequency vibration changed and then you didn't hear any more, so two month ago, you would not hear due to the outside temp still hot, but these week day, you will easy detected due to temperature around 18 degree c in the morning.
.cold start fast idle speed changed depend on the temperature.
Once you pressed down the clutch pedal, it dis-engage with the transmission power path, the frequency changedor loading changed. Even you no need to press the clutch, wait until it warm up, the rpm drop to idle, the vibration sound se se will gone.
same as your mobile phone , set in vibration mode when ring call in.

因車頭凍，計油未熱，所以震盪到，當車頭運行一段時間應無問題的了，少事！
貨車仲嘈，新車一定無呢ｄ情況出現，舊車通常會有少毛病，但唔會影響到，放心

通常滋滋聲表示要換皮帶咋喎. 是否好耐冇換過皮帶?