Possibly a loose heat shield or other component.
It may be the heat shields on the exhaust system vibrating.
Heat shield on catalytic converter? Octane rating of fuel not high enough Timing too far advanced Catalytic converter itself
The rattling sound in the front of a 1995 Honda Civic wheels can be caused by wheel bearings. These bearing allow the wheel to turn and when they fail the produce a loud noise.
If it's a type of clunking noise, check your gearbox. If it's some kind of rattling, check your hubcaps.
It is the alternator....
no oil
Many different things can cause a rattling noise in a Mazda tribute. Stark by checking the engine belts and all brackets for anything that could be loose and causing a rattle.
what kind of noise?
Well without further analysis or information, a short answer would be that your engine is BROKEN.
Bad ignition coil
The most common cause is slipping belt
The guy in the trunk is still alive!!!