Engine knocking, or detonation, occurs when fuel in the cylinders ignites unevenly, causing metallic pinging sounds, reduced power, and potential engine damage. Key causes include low-octane fuel, ...

Engine noise makes us more nervous than any other automotive sound because noise can mean expense and inconvenience. And, sometimes engine noise is nothing more than a normal dynamic of the engine's ...

A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...

Q: I have a 2006 Mercury Mountaineer with a 4.6-liter V8 that makes a screeching noise along with a tapping noise upon a cold start. I removed the serpentine belt and started the engine, and the same ...

The tapping noise may be a leaking exhaust manifold, as you suspect, or a loose spark plug, but my Alldata automotive database pulled up bulletin 06-9-11, dated May 2006, describing a loud tapping ...

My engine has developed a strange ticking sound. Its whisper-quiet before an oil change, and then makes a loud tapping after a new filter and fresh oil. This cycle has been going on for about 20,000 ...

Q: I have a 2006 Mercury Mountaineer with a 4.6-liter V8 that makes a screeching noise along with a tapping noise upon a cold start. I removed the serpentine belt and started the engine, and the same ...

You're tooling along on your way home from a cruise night or a car show when you pull up to a stop sign. As the engine drops down to an idle, you hear astrange sound from under the hood. It's not a ...

Hello Paul, my car makes irritating noises that I suspect are coming from within the engine. Every time I drive, it sounds and feels as if something is shaking, especially under the bonnet. I am ...

Engine noise makes us more nervous than any other automotive sound because noise can mean expense and inconvenience. And, sometimes engine noise is nothing more than a normal dynamic of the engine's ...

Engine noise makes us more nervous than any other automotive sound because noise can mean expense and inconvenience. And, sometimes engine noise is nothing more than a normal dynamic of the engine’s ...