LOST JEEPS
http://www.lostjeeps.com/forum/phpBB3/

Water from exhaust
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=16327		 Page 1 of 1
Author:  AfricaJeep [ Tue Jan 09, 2007 5:59 am ]
Post subject:  Water from exhaust
I have always had water dripping from my exhuast pipe at the back of the vehicle - enough to be noticeable.

On Saturday I was by my brothers place and one of his guests who was parked in front of me in the driveway wanted to leave. As I reversed out I noticed a big puddle of water where I was parked and smaller puddles following the Jeep as I reversed. This seemed strange as I did not use the aircon at all on Saturday.

Pulled back into the driveway and start looking under the engine expecting to find a water leak. Could not see anything and as I was about to get up, I noticed the source of the water. Water was dripping from my exhaust just before the big muffler at the back of the vehicle. Enough was dripping from there to form a nice big puddle under the vehicle.

Is this something that I should be worried about?

P.S I drive a 2002 3.7 Sport Auto
Author:  sleeve84028 [ Tue Jan 09, 2007 7:14 am ]
Post subject: 
it's standard stuff... mine will make two puddles:

1) From the HVAC drain tube near the middle of the Jeep
2) From the tail pipe

The size of the puddle depends on the amount of time spent idling in the same spot
Author:  Jeepjeepster [ Tue Jan 09, 2007 1:46 pm ]
Post subject: 
Water is a by-product of combustion. :wink:
Author:  tjkj2002 [ Tue Jan 09, 2007 1:55 pm ]
Post subject: 
When cold metal is heated up fast like your exhaust system condensation forms and that's the water you see coming from your exhaust.Water is only a by product for hydrogen powered vehicles as of yet.
Author:  Jeepjeepster [ Tue Jan 09, 2007 3:03 pm ]
Post subject: 
tjkj2002 wrote:
When cold metal is heated up fast like your exhaust system condensation forms and that's the water you see coming from your exhaust.Water is only a by product for hydrogen powered vehicles as of yet.


Are you sure about that?

Clicky

C_xH_y + (x + \frac{y}{4})O_2 \rightarrow \; xCO_2 + (\frac{y}{2})H_2O

Thats the chemical equation for the burning of a hydrocarbon which is what gas is. Different hydrocarbons.

The equation didnt copy to well.. :?
Author:  sleeve84028 [ Tue Jan 09, 2007 4:50 pm ]
Post subject: 
I was going to say... Part of the job of the catalytic converter is to absorb the noxious fumes and seperate them from the water that is suspended in the mixture. The reclaimed water is supposed to drain out of the catalyist but most of the time it makes its way into the muffler where it will pool up and be sent out in small quantities when you take off from a stop sign or light.
Author:  tjkj2002 [ Tue Jan 09, 2007 7:53 pm ]
Post subject: 
Quote:
Thats the chemical equation for the burning of a hydrocarbon which is what gas is. Different hydrocarbons.
That's right about it being for different hydrocarbons,if you got water coming out of the combustion chamber time for a new gas station or you have a coolant leak.The catalytic converter is like a oven it burns off the unburned hydrocarbons leaving the combustion chamber.The condisation coming from a cold surface warming up is the same as a glass of ice water or bottle of soda,condisation forms on the outside of the container as the cold surface warms up.
Author:  Jeepjeepster [ Tue Jan 09, 2007 7:59 pm ]
Post subject: 
Anytime you compress air, your going to get water b/c of the water vapor in the air. That just a fact of life. :wink:

The water vapor builds up in the exhaust until it heats up. Why would the water form in the exhaust if it was a hot HUMID summer day?

The reason the water forms on the glass of ICE water is b/c the water is COLD. The COLD glass causes the water vapor in the air to become water droplets on the glass. Its kinda the same thing as the water coming from the engine, but then again its completely different. :wink:
Author:  tjkj2002 [ Tue Jan 09, 2007 8:22 pm ]
Post subject: 
Quote:
Jeepjeepster

Anytime you compress air, your going to get water b/c of the water vapor in the air. That just a fact of life.
I completly agree with you but take your exhaust manifolds off and run your engine,no water will come out.I'm done with this subject,I'm not going to say anymore,learned all I need to know about vehicles exhaust while studying and taking the ASE's X-1 test(I'm not a expert either,just know the basic facts).
Author:  struggle07 [ Thu Jan 11, 2007 10:55 pm ]
Post subject: 
Jeepster, I know you are right. As far as running an engine without the headers, and you won't see water statement...of course you won't. The water is in vapor form and just dissipates into the air. It is like when you breathe. When you breathe when it is warm out, you see nothing. Does that mean that there is no water vapor in your breath? Breathe into a tube on a warm day (or hot or cold day for that matter) and you will notice that water forms on the inside of the tube. Same principle with an engine. So just because you can't see the "water running out the exhaust ports" doesn't prove that there is no water produced during combustion (because it is).
Author:  SnowgodCCR [ Fri Jan 12, 2007 8:55 am ]
Post subject: 
There IS water formed as a byproduct of hydrocarbon combustion, along with heat, light, and other gasses, such as CO and CO2, It's a physical FACT. Combustion in it's simplest form would be the combustion of pure hydrogen with pure oxygen (bad idea BTW, don't try at home). Basically, in it's elemental form, Hydrogen just chills by its lonesome, and Oxygen pairs up with a fellow Oxygen buddy (always follow the buddy system :wink: ) So, we have H+O2. Since we all know that for the bond to be stable, oxygen needs to find two valence electrons, we now have 2H+O2. Again, this won't work because we need to balance the equation. So, now we can get 4H+O2, because there are actually 2 oxygen atoms in the molecule. This equation will balance out to become 4H+O2=2H2O. Thus proving that water is infact a byproduct of combustion. Since I'm not sure of the chemical formula of Gasoline (or diesel if you prefer), I can't do the math for a hydrocarbon combustion reaction, but if anybody wants to do it out, this would just reenforce the fact.

I'm not a chemist, nor have I taken a chemistry class in about 3 years, so if anybody points out a mistake in my proof (and they know for sure), PM me with a solution and I'll fix it so I don't look st00ped.
Author:  SnowgodCCR [ Fri Jan 12, 2007 9:13 am ]
Post subject: 
woops...I totally forgot to answer the question in the OP. Your water is probally coming from your HVAC pipe. In South Africa, you probally had your A/C running, correct? Water always comes out the exhaust pipe when...actually anytime...but MORE water comes out when you have the AC running, due to condensation, same reason that a pool of water forms under household window AC Units.
Page 1 of 1 All times are UTC - 5 hours [ DST ]
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/