I am unhappy with the engine idle sound of my 2011 Odyssey and wonder if it is normal or a defect. When the engine is fully heated up (after some driving), I start hearing diesel-like engine sound (periodic sound commonly found in old engine, not big though) when I stoped (when RPM is round 0.5~0.6). Are there anyone concerned about this kind of problem? My 5 years old 4-cylinder Honda accord never has this kind of sound. Quite disappointed about the engine sound in V6 2011 Odyssey. Thanks.