Today I was travelling behind a Yeti in 40mph zone.  I noticed at one point a fair amount of water coming out of the exhaust, not a trickle or a spray as I have normally seen.  This was like someone throwing a full cup or mug of water out.  The temperature was around 14C, could not tell if it was a petrol or diesel, but it was a FL 65 plate.

 

As stated previously, I have seen trickles or droplets of water coming out of exhausts when waiting at traffic lights, but never this amount.  Is it normal, and if so, what would cause this?

 

Many thanks,

 

Fin

Almost certainly normal.  When you burn a litre of fuel you get around a litre of water.  It’s usually vapour but if the exhaust is cool it acts as a long condenser and you get steam and liquid water.  If you do short journeys the water can accumulate in the exhaust and get ejected by G-force under acceleration, or simply blown out by the exhaust stream.

Many thanks for your reply. 

 

I just hadn't seen that amount of water being ejected at once from an exhaust. 

@Fin69 - Me neither, not even on a petrol engine.