Water in the exhaust...

Warfang

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Is it normal to have very small amount of water coming out of the exhaust when you're warming the car up in the morning after it's been sitting in the garage for a week? Would hate to think there's a bad gasket. Checked the oil, and all looks fine.

Just had a gasket go bad on my daily driver, so ultra-sensitive to it now.
 

DodgeViper01

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That is not a big deal. Moisture builds up and gets released at every start up that way, especially if the car sits for a few days or more.
 

2001 GTS

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Is there any way to get rid of the black spot (2ft x 3ft) from forming on the garage floor??

Car has HF cats and a Vec2
 

dave6666

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Most home improvement stores have concrete cleaning products. Probably just carbon in the stain, and my guess is it will remove easily. You might have to do the whole garage, if you have older concrete. You'll have a clean spot!

Or you can just buy a Corvette. I heard that the same engineer that installed the 12th cup holder with integrated tissue dispenser also solved the exhaust stain problem.
 

Tom F&L GoR

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Moisture doesn't build up or collect, water is a normal product of combustion. Running the engine creates the water. Perfect combustion produces only water and CO2.

It drips out the exhaust while warming up because the exhaust system is cold and the water vapor condenses. It stops dripping when the pipes get hot enough to keep it in "steam" form until it exits the pipe.

You cannot prevent this unless you preheat your exhaust system or keep the engine running so it doesn't cool off.

This is why pickup trucks usually need an exhaust system sooner than cars - the long pipes take forever to heat up and they rust from the inside out. Some mufflers have a hole drilled in them to allow water to drip out.
 
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GT40DOC

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If you install side exhaust, then you can have TWO black areas on your garage floor.
 
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