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Old 8th June 2008, 18:45   #1
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Default Water in Silencer

Hi Guys,
I have a Zen vxi 2002 done 35000 kms. Off late I noticed that if I start the car and idle it for sometime, there is water in the silencer. I was shocked to see this as I had never thought water can come out of the silencer. I open the radiator and the water level was full, the coolant tank(which is rather small) was at 2 inches below the full mark. I had filled the coolant tank with water untill the full level some 2 months ago. So it doesnt appear as if radiator water is going through the exhaust, otherwise in 2 months all the water would have been over.
I am wondering where this water is coming from. Can you guys please help?

TIA,
Nitin
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Old 8th June 2008, 21:23   #2
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yeah its not an issue. i have seen it happen in maruti's petrol cars. don't worry!
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Old 8th June 2008, 22:17   #3
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when a hydrocarbon burns in adequate oxygen, there will be 2 products mainly- 1.water and 2,CO2

the CO2 you wont see. the water will spurt out in the mornings or when you rev the car after it cools down when parked. nothing to worry.
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Old 8th June 2008, 22:32   #4
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water coming out of the tail pipe is a good thing
it means that the engine is a good state
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Old 9th June 2008, 18:19   #5
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Congratulations !!!!!! You have a health engine !! The small quantity of water that you see spewing out means that your engine is in prestine condition.

Though I may not be very technically correct, but I shall try.

This is true for most petrol cars, when the morning temperature is low, water does come out of the tailpipe. You may even have noticed some cars "smoking" in extreme winters, it happens when relatively warm air from the engine comes in contact with extremely cold air.


Hope this clarifies your confusion ?


Cheers
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Old 9th June 2008, 21:36   #6
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Thanks a lot everyone.
Felt very nice to know my baby zen is in good health. I will continue to take good care of it
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Old 9th June 2008, 21:41   #7
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Our M800 has the same phenomenon, and I am happy about this!
Its nothing to worry about.
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Old 9th June 2008, 22:00   #8
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Its good sign! My Petrol Innova omits water many occassions when I switch on the engine in cold engine conditions, I saw water dropping from silencer in many MUL cars and when checked with experts I came to know its good sign.

I saw water came out from my Matiz silencer after Mr. Keshav (TBHP username Physco) has installed FFE, I am so happy with his work and improvement of performance of Matiz even with AC on.

I feel after engine heats up water drops disappears into air.

Regards,

Ravi.
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Old 10th June 2008, 12:49   #9
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Quote:
Originally Posted by ravibhat View Post

I feel after engine heats up water drops disappears into air.

Regards,

Ravi.
When / As soon as the engine heats up, the O2 ( Water ) released in the exhaust is now converted into vapour. So its not visible. This is sometimes the reason for rust inside the surface of silencer.
In case of two stroke engines, we add oil in fuel itself, so the oil deposits wont allow so much rusting. But the silencers of two stroke last less, because they get choked thanks to the unburnt oil that comes out from exhaust.
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Old 11th June 2008, 08:01   #10
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Quote:
Originally Posted by aaggoswami View Post
, the O2 ( Water )

Sorry for typing mistake. It was suppossed to be read as the H2O ( Water ).
It was not suppossed to be O2. Again Sorry for this.
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Old 3rd May 2009, 08:55   #11
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Quote:
Originally Posted by Ricky_63 View Post
This is true for most petrol cars, when the morning temperature is low, water does come out of the tailpipe. You may even have noticed some cars "smoking" in extreme winters, it happens when relatively warm air from the engine comes in contact with extremely cold air.
Almost throughout the entire winter season (Kolkata winter is never extreme) my car's exhaust was smoking a "vapour" like thing. I was extremely concerned with this. It's just a 2 year old ALTO. When I would keep my hand near the exhaust my hand would be filled with condensed water. When I took with up with MASS they played it down saying the engine is in good shape. Even now when there is enough heat and humidity in Kolkata water spurts out of the exhaust. It's just that it didnt seem normal to me that why I'm asking this question.
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Old 3rd May 2009, 10:50   #12
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It is steam yo. No need to be worried. Suffice to say, water in the cylinder will blow up your engine. Therefore, the water is a byproduct of combustion and nothing that is flowing through the system.
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Old 4th August 2009, 14:27   #13
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why do we say water drops out of silencer is a good sign of a healthy engine?
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Old 4th August 2009, 14:29   #14
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It's a good sign, my Amby petrol also emits water from the silencer, and I'm happy about the same, though I thought it only happens in Maruti's first.
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Old 4th August 2009, 15:46   #15
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It is a sign that the catalytic converter is doing it's job well.
One of the things that a catalytic onverter does is as below :

Oxidation of unburnt hydrocarbons (HC) to carbon dioxide and water:
CxH2x+2 + 2xO2 --> xCO2 + 2xH2O

This is the water that we see in the tailpipe. If the tailpipe is not suitably angled to let the water drain out, this could lead to rusting of the tailpipe in humid cities like Chennai !

If the engine heats up and has been running for some time, most of this water will escape in the form of steam : hence the water will be visible mostly in the mornings or other times when the engine has just been started up.

Last edited by Blue Thunder : 4th August 2009 at 15:51.
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