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.
Engine and Transmission Mounts. Engine and transmission mounts are an often overlooked cause of engine noise and vibration. A loose or broken motor mount that allows excessive engine movement may allow a belt-driven fan to hit the fan shroud, or the fan to hit the radiator hoses.he rear mount may be part of a bolt-in crossmember support. On front-wheel drive (FWD) cars and minivans with transverse mounted engines, there are left and right engine/transmission mounts, and a third mount above or below to triangulate support.