High Quality Content by WIKIPEDIA articles! Hydrolock (a shorthand notation for either hydraulic lock or hydrostatic lock) is an abnormal condition of an internal combustion engine in which an incompressible liquid, commonly water, has been introduced into one or more cylinders, causing immobilization or damage. Hydrolock can occur because an internal combustion engine must compress a volume of gas in order to operate, while most common liquids that could enter an internal combustion engine do not compress. If liquid is introduced at a volume greater than the volume of the combustion chamber at its minimum (top of the piston's stroke), the piston cannot complete its travel. Either the engine must stop rotating or a mechanical failure will occur. Hydrolock is relatively common when driving through floods, either where the water is above the level of the air intake or the vehicle's speed is excessive, creating a tall bow wave. A vehicle fitted with a Cold air intake mounted low on the vehicle will be especially vulnerable to hydrolocking when being driven through standing water or heavy precipitation.

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