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914World.com _ 914World Garage _ lots of steam from exhaust
Posted by: last337 Jan 14 2013, 06:09 PM
Why do I have so much steam coming from exhaust? Seems like every time I start it I get lots of water and steam from exhaust. Is this just a function of cold damp weather?
Posted by: jdlmodelt Jan 14 2013, 06:24 PM
QUOTE(last337 @ Jan 14 2013, 05:09 PM) 
Why do I have so much steam coming from exhaust? Seems like every time I start it I get lots of water and steam from exhaust. Is this just a function of cold damp weather?
Are you driving a 914 with an air cooled engine in it? IF so, your engine is doing what it is supposed to do. makes water. It will be steaming when you first start it. After the engine warms up the steam is boiling off before you can see it coming out of the tail pipe. That's my take on it.
Posted by: Elliot Cannon Jan 14 2013, 06:27 PM
Moist air condenses (becomes water) in the your exhuast system when it gets cold. When you start it up, it gets hot and the water comes out both as liquid and steam.
Posted by: 914itis Jan 14 2013, 10:12 PM
Or it could be from your radiator. 
Posted by: euro911 Jan 14 2013, 10:43 PM
QUOTE(914itis @ Jan 14 2013, 08:12 PM)
Or it could be from your radiator.
Go to your room 
Posted by: kg6dxn Jan 14 2013, 11:26 PM
You should sell that steam powered 914 to Jay Leno for big $$$... 
Posted by: last337 Jan 15 2013, 06:49 AM
Haha thanks for all the replies. I figured it was normal but I dont understand why there would be more steam from air-cooled engine than water cooled
Posted by: billh1963 Jan 15 2013, 07:22 AM
QUOTE(last337 @ Jan 15 2013, 07:49 AM)
Haha thanks for all the replies. I figured it was normal but I dont understand why there would be more steam from air-cooled engine than water cooled
One of the byproducts of combustion is water
Combustion of Fossil Fuels: The combustion of all fossil fuels follows a very similar reaction:
Fuel (any hydrocarbon source) plus oxygen yields
carbon dioxide and water and energy.
The simple combustion reaction below is given for methane. Gasoline is more complex; however, the results are basically the same.
The combustion of methane means that it is possible to burn it. Chemically, this combustion process consists of a reaction between methane and oxygen in the air. When this reaction takes place, the result is carbon dioxide (CO2), water (H2O), and a great deal of energy. The following reaction represents the combustion of methane:
CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy
One molecule of methane, (the [g] referred to above means it is gaseous form), combined with two oxygen molecules, react to form a carbon dioxide molecule, and two water molecules usually given off as steam or water vapor during the reaction and energy.
Posted by: 914itis Jan 15 2013, 08:26 AM
QUOTE(euro911 @ Jan 14 2013, 11:43 PM)
QUOTE(914itis @ Jan 14 2013, 08:12 PM)
Or it could be from your radiator.
Go to your room Did I say something wrong?
Posted by: Cupomeat Jan 15 2013, 08:26 AM
Yes, and this is a good reason why you should not drive your car for short little trips. You want your exhaust good and hot when you shut it off to reduce the amount of water in it while sitting.
All cars do this, sometimes I'll see the water pour out of a muffler on a recently started car as they take off from a stop light.
Posted by: last337 Jan 15 2013, 09:01 AM
QUOTE(Cupomeat @ Jan 15 2013, 08:26 AM)
Yes, and this is a good reason why you should not drive your car for short little trips. You want your exhaust good and hot when you shut it off to reduce the amount of water in it while sitting.
All cars do this, sometimes I'll see the water pour out of a muffler on a recently started car as they take off from a stop light.
I follow what you are saying and understand how water would accumulate in the exhaust. However, the comment was made that implied that being an air-cooled engine would cause more steam and I am still unsure about how that could be the case.
Posted by: billh1963 Jan 15 2013, 09:12 AM
QUOTE(last337 @ Jan 15 2013, 10:01 AM)
I follow what you are saying and understand how water would accumulate in the exhaust. However, the comment was made that implied that being an air-cooled engine would cause more steam and I am still unsure about how that could be the case.
I just re-read all the threads and no one said there would be more steam from an air cooled engine vs. a water cooled engine. Where do you see that?
Posted by: last337 Jan 15 2013, 09:43 AM
QUOTE(jdlmodelt @ Jan 14 2013, 06:24 PM)
QUOTE(last337 @ Jan 14 2013, 05:09 PM)
Why do I have so much steam coming from exhaust? Seems like every time I start it I get lots of water and steam from exhaust. Is this just a function of cold damp weather?
Are you driving a 914 with an air cooled engine in it? IF so, your engine is doing what it is supposed to do. makes water. It will be steaming when you first start it. After the engine warms up the steam is boiling off before you can see it coming out of the tail pipe. That's my take on it.
I thought that was what he was implying with this statement about air-cooled engine and was curious if I was missing something.
Posted by: URY914 Jan 15 2013, 09:51 AM
Probably your water pump seal. Or head gasket. Check your heater core. Check your hoses.
Call Auto Atlanta. George will sell you everything you'll need to fix it right up.
Posted by: last337 Jan 15 2013, 10:18 AM
QUOTE(URY914 @ Jan 15 2013, 09:51 AM)
Probably your water pump seal. Or head gasket. Check your heater core. Check your hoses.
Call Auto Atlanta. George will sell you everything you'll need to fix it right up.
Haha, okay thanks! I should probably check that water pump out
Posted by: Nine_14 Jan 15 2013, 10:44 AM
QUOTE(billh1963 @ Jan 15 2013, 04:12 PM)
QUOTE(last337 @ Jan 15 2013, 10:01 AM)
I follow what you are saying and understand how water would accumulate in the exhaust. However, the comment was made that implied that being an air-cooled engine would cause more steam and I am still unsure about how that could be the case.
I just re-read all the threads and no one said there would be more steam from an air cooled engine vs. a water cooled engine. Where do you see that?
Bill, you will become a good teacher.....
Open a course .... first steps im physics and chemistry....take money for that.
Your first customer is known.
Posted by: carr914 Jan 15 2013, 11:33 AM
QUOTE(Cupomeat @ Jan 15 2013, 09:26 AM)
Yes, and this is a good reason why you should not drive your car for short little trips. You want your exhaust good and hot when you shut it off to reduce the amount of water in it while sitting.
And your Exhaust will rust from the Inside out.
If you car is not Concours, you can drill a small hole at the low point of your Muffler & the water will drain out
Posted by: euro911 Jan 15 2013, 02:07 PM
Hmmm .... install a bleeder valve like the one in the bottom of an air compressor 
Posted by: Chris H. Jan 15 2013, 02:20 PM
Check the Fetzer valve on the bypass line... (Name the classic movie)...
Posted by: Chris H. Jan 15 2013, 02:26 PM
Posted by: last337 Jan 15 2013, 03:07 PM
QUOTE(euro911 @ Jan 15 2013, 02:07 PM)
Hmmm .... install a bleeder valve like the one in the bottom of an air compressor
I like that idea. Almost like installing a drip on a residential gas fuel line.
Posted by: Cupomeat Jan 15 2013, 03:46 PM
QUOTE(last337 @ Jan 15 2013, 04:07 PM)
QUOTE(euro911 @ Jan 15 2013, 02:07 PM)
Hmmm .... install a bleeder valve like the one in the bottom of an air compressor
I like that idea. Almost like installing a drip on a residential gas fuel line.
If you look at most steel, rolled edge mufflers (like an old school style, not like a modern german car), there is usually a small hole in the lowest point on the muffler for a drain.
Great Fletch ref, thanks, BTW.
Posted by: Elliot Cannon Jan 16 2013, 12:27 AM
QUOTE(Chris H. @ Jan 15 2013, 12:26 PM)
What cowboy comedy was the other guy in? The guy on the right of course is Chevy Chase.
Posted by: SLITS Jan 16 2013, 08:20 AM
QUOTE(Elliot Cannon @ Jan 15 2013, 10:27 PM)
QUOTE(Chris H. @ Jan 15 2013, 12:26 PM)
What cowboy comedy was the other guy in? The guy on the right of course is Chevy Chase.
your favorite .... Brokeback Mountain ...................
Posted by: Cupomeat Jan 16 2013, 08:30 AM
QUOTE(Elliot Cannon @ Jan 16 2013, 01:27 AM)
QUOTE(Chris H. @ Jan 15 2013, 12:26 PM)
What cowboy comedy was the other guy in? The guy on the right of course is Chevy Chase.
Well, he was in a lot of westerns, but he was best in "Blazing Saddles" playing Lyle. His name is Burton Gilliam.
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