hello,
within the last week my 1999 toyota corolla (automatic) has started making strange rattling noises at idle. once i step on the accelerator a bit or start driving the sounds die down or go away completely. the sound does not change with engine rpms, making me believe it is not the engine. the noise happens whether the car is in drive, park, or neutral. the sound also seems to disappear or be intermittent when the vehicle is actually in motion, but happens most often at lower speeds. the vehicle feels no different than normal, it pulls fine, stops fine, turns fine, etc... (here is a video of car running for reference)
thoughts on what it might be or how to fix it? any and all help is greatly appreciated.
Sounds like a worn pulley to me. Take the belts off and see if you can find the one that is worn. Just try to give the pulley a good wiggle and turn and see if one is much harder to turn or wobbles when you twist it. Could also be a heatshield rattling on the exhaust.
If it was engine damage it would be consistent and match the engine speed.
