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Why does my instrument occasionally make a sound like a behavior rattle when I go from a cool start, Is this sound harmful? Answer:

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It depends... occasionally if not started in a lengthy period it's only that the oil has drained out.

Best object to work out that topic is to run the weight oil recommended by the manufacturer and first to run the motorcraft oil clean if a Ford as Ford has had some issues with other oil filters draining back causing the sound you describe

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No one can analyse you car for you over the internet. The answer could be something as easy as a loose beat shelter on your tire to worn crank bearings. Any think is only that...a guess.

Have a technician take a look at it for you.

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Sounds like pinging. Are you using even blow in a car that requires, or recommends, premium?

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I spun a behavior in my Triumph. I didn't pay attention to the behavior rattle until the oil got warm and thinned out. You've got another problem, first take it in to you technician to competition out. Since it only happens when it's cold, take it in original in the morning so it can sit and cool down for the technician to listen.