The Ford Barn - View Single Post - y-block blow by..

40 Deluxe · 11-20-2019, 01:07 PM

Water (condensation) out the exhaust is common on cars used for short trips. Water is a byproduct of combustion. Gasoline is a hydrocarbon, the 'hydro' being hydrogen. Anyway, the water vapor in the exhaust gases condenses to liquid when it reaches the cold pipes and muffler. Idling and putt-putting around town never lets the exhaust system get warm enough to evaporate out this water so it dribbles out the tailpipes. Exhaust gases are corrosive so when mixed with water can rust out pipes and mufflers in a hurry! That's why the old-time corner gas stations all had racks and racks of tailpipes and stacks of mufflers.

11-20-2019, 01:07 PM	#67
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,778	Re: y-block blow by.. Water (condensation) out the exhaust is common on cars used for short trips. Water is a byproduct of combustion. Gasoline is a hydrocarbon, the 'hydro' being hydrogen. Anyway, the water vapor in the exhaust gases condenses to liquid when it reaches the cold pipes and muffler. Idling and putt-putting around town never lets the exhaust system get warm enough to evaporate out this water so it dribbles out the tailpipes. Exhaust gases are corrosive so when mixed with water can rust out pipes and mufflers in a hurry! That's why the old-time corner gas stations all had racks and racks of tailpipes and stacks of mufflers.