is caused by water and or antifreeze entering the cylinder, and the
engine trying to burn it with the fuel. The white smoke is steam. There
are special gaskets (head gaskets are the primary gaskets) that keep the
antifreeze from entering the cylinder area. The cylinder is where the
fuel and air mixture are being compressed and burned. Any amount of
antifreeze that enters this area will produce a white steam that will be
present at the tailpipe area.
If white smoke is present, check to see
if the proper amount of antifreeze is inside the radiator and the
overflow bottle. Also check to see if antifreeze has contaminated the
engine oil. You can look at the engine oil dipstick, or look at the
under side of the engine oil filler cap. If the oil is contaminated with
antifreeze, it will have the appearance of a chocolate milkshake. Do not
start the engine if the oil is contaminated with antifreeze, as serious
internal engine damage can result.
How did antifreeze get in the oil or
cylinder in the first place? The engine probably overheated and a head
gasket failed due to excessive heat, thus allowing antifreeze to enter
the cylinder (Where it is not meant to be).
More references in here
Hope helps with this (remember rated this help) Good luck..