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MDX engine knock sound
My 2010 Acura MDX occasionally has a light knocking sounds when apply light acceleration while going 25-40 mph. Quite often I hear a very light metallic sounds best described as a Christmas bell sound. Every now and then I hear a more pronounced knocking sound. It's not as loud as a diesel clack but can definitely can be heard with the radio off.
Wonder if it is indeed engine knock or something else. It sounds like the engine is lugging a bit.
Tried different premium gas but no difference.
Does anyone else hear the fairly consistent low volume Christmas bells metallic jingle?
Does anyone else hear the occasional engine knock?