the metallic sound
the metallic sound similar to detonation sound , it is appear for 1 or 2 second in the beginning of drive in quick, throttle opening and then disappear.
I have temporary metallic sound in extreme driving situations specially after the engine is become warmer and especially in the beginning of drive in quick, throttle opening
What can it be??
BMW C650 GT 2014
Thanks
DORI
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