You may be surprÂ­ised to discover that a carbon monoxide (CO) detector really isn't a complicated piece of equipment. Housed inside a plastic chamber approximately 3 inches (7.6 centimeters) in diameter are parts that work in unison to alert a househoÂ­ld when lethal gas is detected.
This type of noise is usually caused by malfunctioning valve lifters or an exhaust manifold leak. If the noise lasts for more than a minute and completely disappears or dimishes after the engine is warm, the most likely cause is an exhaust manifold leak.
Step 1. Check for loose objects. Loose metal objects in the machine, belt buckles, big zipper pulls, and the like, can cause frightening sounds, especially when the drum reaches its highest spin-cycle speeds. Items left in a pocket may have come out and be rattling around inside the washer drum or be caught in the drain filter.