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.
Excessive backlash in the differential gears, or worn bearings or gears in the transmission or transaxle will typically make a whining noise thatâs loudest during deceleration, but rarely cause a vibration. If you detect audible gear noise, check the lube levels in the differential, transmission or transaxle.