White smoke coming from a car's tailpipe means that somewhere moisture is being burned off. However, it can also indicate a more serious issue if the coolant or gas is the moisture being burned off. If the smoke disappears shortly after starting, there is likely no problem, but if it continues, it means that water or coolant are in the combustion chamber.Know More
The most common serious cause of white smoke coming from a car's tail pipe is a leaking or blown head gasket. As a person is less likely to notice the color of smoke coming from their car's tail pipe, another common symptom of this problem is overheating. If the car is overheating regularly and emitting white smoke, the culprit is almost certainly a blown head gasket.
The head gasket works as a seal between the engine block and cylinder head. When this seal is broken, water or coolant is able to enter the combustion chamber. The water turns to steam in the chamber and comes out of the tailpipe as white smoke.
A more dangerous reason is fuel in the intake from a faulty fuel delivery system. This also exits the tail pipe in the form of white smoke and smells like gas. The danger is that it could ignite in the hot muffler.Learn More
The most common cause of white smoke from under the hood of a vehicle is an overheated engine. In this case, the driver is actually seeing steam from the radiator instead of smoke. However, if a burning smell accompanies the smoke, there is likely another type of fluid leak.Full Answer >
Smoke coming out from under the hood of a car means the engine is overheating, according to CarsDirect and HowStuffWorks. It can be caused by a variety of problems, but is most commonly associated with a malfunction in the cooling system, more specifically the radiator.Full Answer >
White exhaust smoke is usually the result of condensation and moisture buildup in the exhaust system; it can also be the result of burning coolant within the engine. When white exhaust smoke is thin and vaporous, it usually does not signify a problem within the car.Full Answer >
Thin, white smoke coming from an exhaust pipe usually indicates normal condensation buildup in the exhaust, but thick, white smoke can indicate a problem like the engine burning coolant, a cracked engine block, a blown head gasket or damaged cylinder head. Thick, black smoke is generally a sign that the engine is burning excess fuel, and is typically not an indicator of as serious a problem as thick, white smoke.Full Answer >