slipping alternator/Power Steering/ auxillary drive belt
a loose or slipping belt
Faulty engine
Squeaky brakes, sticky lifters engine knocking . Please be a little more specific.
Detonation...Needs to be fixed immediately or will eventually destroy engine.
it makes that sound when its etheir frightened or in pain, you probaly would yell too, if you were it.
Either it the accessory belt is worn out or one of the accessory (alternator, water pump, etc...) that need to be replaced.
An engine might sound like a diesel at operating temperature if the engine was a diesel or if there was an issue with the manifold. Sometimes gases escaping the manifold cover could cause the engine to sound different.
throttle body
incomplete combustion of fuel
Interesting question. If the car's engine cause the car to reach the speed of sound, causing a shock wave, then the engine did indirectly cause a shock wave. The engine itself creating a shock wave however, is highly unlikely if not impossible. The moving parts in a typical combustion engine do not get anywhere near the speed of sound and any car that would reach the speed of sound would most likely have a jet engine like Thrust SSC.
My 2007 Murano has squeaky brakes when I first start out, usually in the morning or after sitting for awhile. After a minute or so, the squeak goes away. The brakes work fine.
A defective vacuum line can cause a whistling sound when the vehicle is accelerating. A loose belt can also create a high pitched whistle sound.