Answer (1 of 6): The water is an engine coolant as you are probably well aware. For it to come out the exhaust when refilling your radiator it must get into the exhaust pipe, this can be achieved by having a great big crack in the engine block that allows the water to drain into the exhaust side
Is it normal for a coolant level to drop? - Quora
My car's coolant runs out every day. What could the problem be? - Quora
How did water get inside my car's engine? The hood had not (apparently) been opened. - Quora
Why is the coolant reservoir overflowing? - Quora
I heard experienced automobile mechanics say that water dripping from the exhaust pipe after starting indicates good health of the engine. How? - Quora
Why is there white smoke coming from my radiator and the top of my engine but the car won't overheat? - Quora
My 2008 Jeep Liberty overheated on the highway. I had antifreeze on some parts of the engine and such. Are there any other possibilities it's something else other than a broken hose?
How to check exhaust gas in coolant? Why does our coolant smell like exhaust - Quora
How can there be oil in the coolant but not coolant in the oil? - Quora
How to reduce engine heat - Quora
Will the radiator overheat if the oil is not changed every time at 5,000 miles? - Quora
Can coolant get low without a leak? - Quora
When I pour water/antifreeze into my radiator it comes out of the tailpipe, what could cause that? - Quora
My car has no apparent leaks, but is losing water at a rapid rate. Could the thermostat be the problem? - Quora
What happens when we put water in coolant? - Quora