Whine noise A160 auto, air, ps. 2002 w168 when engage drive or reverse from idle stange muffled rattling/harmonic sound for an instant perhaps between 800 to 1000rpm when vehicle starting to move, if in just slightly reve motor similar in neutral I cannot replacate the noise, if I turn on air cond (for load on serpentine belt system) dosn't make any difference, no noise(I try to rule out idler pulley and drive belt harmonic vibration this way) I am thinking as it happens when engage either drive or reverse that maybe transmission issue although vehicle drives properly and changes gears correctly. Have you ever heard of cracked drive plate at crackshaft boss for this model. would this be the likely culprit although no funny sounds at crancking for start. PS the engine mounts are sound and exhaust mountings servicable.

SOURCE: Whining from engine when in gear

Just a thought- remove the oil filler cap when the whine is present - (this checks if PCV valve is faulty, causing high crankcase vacuum, which in turn causes a whistling/whine noise as air leaks past engine oil seals). Worth a check.

Try listening with a short piece of hose pipe to locate immediate area/source of noise.

SOURCE: engine or transmission knock / rattle upon

I had the same problem on my 2006 Lucerne and it was the engine mount located on the front of the vehicle behind the radiator.

SOURCE: noisey drive belt, possibly alternator, belt

sounds like idler bearings but you have to release the tension to check,Also you can check the rest of the pulleys also at this time. I dont think you have to drop the engine.

SOURCE: Vibration through the car Transmission-motor Linkage?

Check to make sure both headlights are tight,,,when it rattles at idle go feel the headlight and hold it and see if the noise and vibration goes away,sometimes the headlight has too much clearance and causes a massive vibration,,if thats not it try...loosening all the motor mounts and rock the car back and forth and them retighten them,it reseetles the mounts and sometimes fixes the issue,,also check the lower engine and trans mounts for wear.

SOURCE: Why does my car vibrate and noisy at red light and stop sign

My rio kia bought on from uyi technical dealer in benin city, edo state of nigeria only 4 months ago is vibrating with noise while driving. The noise is noticed by other road users even in motion, making a very loud noise or sound that is highly embarrassing. The dealer mechanics have checked more than twice yet no result, instead the hub bearing is observed; tyres are turn over yet the noise persists.

What do think is resolution to the problem? pls help me. Vinson- [email protected]