Drip From Exhaust Silencer

[KennyW]

Asked similar question before and no reason to suspect answers given were incorrect.
My one year old Ford Fiesta has a water drip coming from exhaust silencer area. Very noticeable after short journeys and seems to be more a lot water coming out this than previously. Been told this is condensation etc escaping through drip hole and nothing to worry about. Seems quite a lot of condensation in view of small puddle left on road!
Any thoughts on this?

[Graham-W]

I was once told that a gallon of petrol burns to produce 1.5 gallons of water. I don't know if this is true but it doesn't sound unreasonable. On short runs condensation buildup in the rear silencer would be considerable.

[Panic Button]

That's why the rear box of your silencer rusts so quickly and needs replacing more often than the rest of the exhaust.

It is also why running an engine for a few seconds causes more wear to the engine than a hundred mile run.

Condensation in the engine plus exhaust gases creates a mild acid.
In a hot engine the water leaves as superheated steam.

[hughjass]

it is the catalytic converter doing it's job.

[Panic Button]

Rubbish

[Toureman]

As pb said Rubbish.

The original answer you got is correct.

[hughjass]

It\'s the cat that turns the exhaust gases to water vapour which cools as it travels through the exhaust system.

[AlBags]

You haven't a clue. It's nothing to do with the cat.

[hughjass]

au contraire,\"How a catalytic converter works\" from \"how stuff works\"


Molecules of polluting gases are pumped from the engine past the honeycomb catalyst
The catalyst splits up the molecules into their atoms.
The atoms then recombine into molecules of relatively harmless substances such as carbon dioxide, nitrogen, and water, which blow out safely through the exhaust.