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Ford Fusion Energi Forum

Hole on exhaust system? Water leaking.


Madevilz
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One of the by-products of internal combustion gases, after catalytic converter interaction, is regular water. This water vapor mixes with other exhaust gases and can be corrosive if it condenses against cool exhaust pipes and collects in the exhaust for long periods.

 

There are drain holes in mufflers on many cars to allow moisture condensation to drain to prevent corrosion. Even on traditional gasoline vehicles where the exhaust pipes get very hot after a few miles of driving, they are present.

 

With these cars being designed to use the ICE as little as possible, the exhaust often doesn't have a chance to warm up enough to naturally cause that condensation from evaporating, so there are drain holes.

Edited by theterminator93
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