Water from car exhaust: Normal occurrence or cause for concern?
Seeing water from a car's exhaust pipe can worry many owners. It's not an everyday occurrence, especially if we regularly maintain the vehicle's technical condition. What does it really mean?
27 June 2024 16:04
Such a sight can cause stress about repair costs, but does it always mean a visit to the mechanic is necessary? Every driver should be aware of this to avoid unnecessary anxiety.
Where and why does water come from the exhaust pipe?
Water from the exhaust pipe is usually condensed exhaust gases that form when the car cools down after driving. This is especially noticeable in the fall and winter, particularly if the trip is short.
During engine operation, invisible water vapour is expelled through the exhaust pipe. When the engine is turned off, the vapour turns into water, resulting in a leak. In most cases, this phenomenon is harmless and does not require intervention.
However, if there is more water than usual, it may indicate problems with the catalytic converters, which reduce the pollutants emitted by the car. If there is also smoke and a burnt smell, malfunctioning pistons could be the problem.
What are pistons and how do they work?
Pistons are a key engine component, without which the mechanism will not work properly. They are metal cylinders that move up and down inside the engine. Around the pistons are three important rings: the compression, wiping, and oil rings, usually made of steel, while the pistons are made of aluminum. The pistons are connected to the crankshaft, which they set in motion.
During cylinder operation, the oil ring draws oil from the cylinder surface, but over time, the rings may wear out and not function effectively. As a result, excess oil can enter the combustion chamber, leading to smoking and converting water into steam.
