Shoving water inside an exhaust to clean it?

four_tire · 17th December 2007, 14:02

Is this water treatment to silencer also done for Petrol Cars or is it just for Diesel one?

Akshay1234 · 17th December 2007, 14:24

Quote:

Originally Posted by four_tire

Is this water treatment to silencer also done for Petrol Cars or is it just for Diesel one?

i think mainly for diesels since they get a lot of carbon deposit.

gameonrwind · 17th December 2007, 14:37

What about cars with Cat's in the exhaust ?

Would this harm the cat?

benbsb29 · 17th December 2007, 14:52

I have seen the same treatment being done to an Indicab at the place where i get my car washed. Initially, i was stunned,later curiousity took the better of me, and i stayed to watch the tamasha.

Jaggu · 17th December 2007, 15:12

Funny part is it works quite well lol, but easier way is to occasionally have a high rpm run and then just clean the end pipes after some normal running. Good for the engine also

Torqueguru · 17th December 2007, 16:12

Quote:

Originally Posted by benbsb29

I have seen the same treatment being done to an Indicab at the place where i get my car washed. Initially, i was stunned,later curiousity took the better of me, and i stayed to watch the tamasha.

benbsb29,
Hehehe..Thats exactly what happened to me when i saw this damn thing being done too!

Torqueguru · 17th December 2007, 16:16

Quote:

Originally Posted by im_srini

Hi TorqueGuru, you probably noticed a quick & dirty technique to clean silencers. I remember reading one such method for decarbonizing engines. It involved removing your air-filter, & dribbling half-a-teaspoon of water into your engine intake (really) ! The theory was that the water would explode into high-pressure steam during combustion, & dislodge the carbon deposits !

srini,
I thought water and engine just werent supposed to be together

....I mean doesnt it defy logic? What are the advantages of this decarbonizing? smoke becomes less blacky???

aby.sam · 17th December 2007, 16:39

Thanks Torqueguru, something strange that I come to know for the first time. Is the same treatment given by all the authorised service centres or is it done by the general service stations.
Could be a quick workaround thats only practised in India

Tazzy Boy · 29th January 2013, 13:37

Please watch this video, the service guy shoves the water hose into the silencer of this diesel indigo and then asks the guy inside to rev the engine so that all that water which was inside is pushed outside.
When asked he said we do that to clean the car and its only recommened for diesel cars and not petrol.

Do you guys think that this procedure wouldnt harm the engine ? plz excuse the quality as it was taken via the phone.

http://www.youtube.com/watch?v=Ple_3BcrP4c

srishiva · 29th January 2013, 14:00

I have seen the same thing many times and asked the guy cleaning the exhaust if it doesn't harm the engine. His answer was he has never seen any harm being done. Its mostly on Indica cabs and it brings out a lot of black soot.

swiftnfurious · 29th January 2013, 14:19

Quote:

Originally Posted by Tazzy Boy

Please watch this video, the service guy shoves the water hose into the silencer of this diesel indigo and then asks the guy inside to rev the engine so that all that water which was inside is pushed outside.
When asked he said we do that to clean the car and its only recommened for diesel cars and not petrol.

Do you guys think that this procedure wouldnt harm the engine ? plz excuse the quality as it was taken via the phone...

This is to remove the carbon soot (as they say). Usually done on all Indiacabs & Sumos with older diesel tech. And its quite effective as well. But the new ech engines with CRDi tech doesn't generate so much dust / deposits and should NOT be allowed to do this stuff.

svsantosh · 29th January 2013, 15:06

I do this often on my Old jeep (now sold) and currently in a 12 year old Armada, note - both dont have CatCons. It does make a effect after all the soot comes out!

Best to avoid in newgen cars! I did practice this in my now-sold Indigo CS TDi, somehow it withstood this treatment, dont know if it caused any longterm damage!

msaudf · 29th January 2013, 15:17

woah!! that's a scary method to clean the insides of the exhaust. I think the Indigo comes with a cat converter in its exhaust system, wouldn't this ingenious trick damage the cat converter?
In the early 90's I remember when my dad and I used to visit out local mechanic during the weekends after servicing the car one of the apprentices of the mechanic used to get under that car with a little hammer and tap the muffler and the continuing pipes while someone slightly revved the engine and chucks of black muck would fly out the tail pipe. i was too young to understand what was happening and my dad would simply say our car is coughing out germs :-)

Tazzy Boy · 29th January 2013, 15:47

This was the new gen engine with the CR4 gearbox, so i think this would coz harm to the car in long run.

Added_flavor · 29th January 2013, 16:07

Unless the water is allowed to go in completely, I don't understand how it can cause harm.

Isn't it equivalent to driving in a flooded road where it is advised to keep the revs high so that water doesn't enter the engine? Also, aren't most bend pipes inclined towards the exit? So how can water defy gravity and go all the way up to the engine when it's running!

17th December 2007, 14:02	#16
four_tire BHPian Join Date: Apr 2006 Location: Bangalore Posts: 212 Thanked: 32 Times View My Garage	Is this water treatment to silencer also done for Petrol Cars or is it just for Diesel one?
	() Thanks

17th December 2007, 14:37	#18
gameonrwind BHPian Join Date: Jul 2007 Location: bangalore Posts: 33 Thanked: 4 Times	What about cars with Cat's in the exhaust ? Would this harm the cat?
	() Thanks

17th December 2007, 14:52	#19
benbsb29 Team-BHP Support Join Date: Nov 2006 Location: Brisbane Posts: 10,103 Thanked: 14,184 Times View My Garage	I have seen the same treatment being done to an Indicab at the place where i get my car washed. Initially, i was stunned,later curiousity took the better of me, and i stayed to watch the tamasha.
	() Thanks

17th December 2007, 15:12	#20
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,383 Thanked: 17,293 Times	Funny part is it works quite well lol, but easier way is to occasionally have a high rpm run and then just clean the end pipes after some normal running. Good for the engine also
	() Thanks

17th December 2007, 16:39	#23
aby.sam BHPian Join Date: Nov 2007 Location: Bangalore Posts: 48 Thanked: 17 Times	Thanks Torqueguru, something strange that I come to know for the first time. Is the same treatment given by all the authorised service centres or is it done by the general service stations. Could be a quick workaround thats only practised in India
	() Thanks

29th January 2013, 14:00	#25
srishiva Senior - BHPian Join Date: Nov 2006 Location: Bengaluru Posts: 4,372 Thanked: 2,260 Times	re: Shoving water inside an exhaust to clean it? I have seen the same thing many times and asked the guy cleaning the exhaust if it doesn't harm the engine. His answer was he has never seen any harm being done. Its mostly on Indica cabs and it brings out a lot of black soot. Last edited by srishiva : 29th January 2013 at 14:05.
	() Thanks

29th January 2013, 15:06	#27
svsantosh Senior - BHPian Join Date: Mar 2008 Location: Dubai Posts: 4,283 Thanked: 8,046 Times View My Garage	Re: Shoving water inside an exhaust to clean it? I do this often on my Old jeep (now sold) and currently in a 12 year old Armada, note - both dont have CatCons. It does make a effect after all the soot comes out! Best to avoid in newgen cars! I did practice this in my now-sold Indigo CS TDi, somehow it withstood this treatment, dont know if it caused any longterm damage!
	(1) Thanks

29th January 2013, 15:17	#28
msaudf BHPian Join Date: Jan 2009 Location: Cochin Posts: 269 Thanked: 164 Times	Re: Shoving water inside an exhaust to clean it? woah!! that's a scary method to clean the insides of the exhaust. I think the Indigo comes with a cat converter in its exhaust system, wouldn't this ingenious trick damage the cat converter? In the early 90's I remember when my dad and I used to visit out local mechanic during the weekends after servicing the car one of the apprentices of the mechanic used to get under that car with a little hammer and tap the muffler and the continuing pipes while someone slightly revved the engine and chucks of black muck would fly out the tail pipe. i was too young to understand what was happening and my dad would simply say our car is coughing out germs :-)
	(1) Thanks

29th January 2013, 15:47	#29
Tazzy Boy BHPian Join Date: Mar 2008 Location: Bangalore Posts: 63 Thanked: 7 Times View My Garage	Re: Shoving water inside an exhaust to clean it? This was the new gen engine with the CR4 gearbox, so i think this would coz harm to the car in long run.
	() Thanks

29th January 2013, 16:07	#30
Added_flavor BHPian Join Date: May 2011 Location: Bangalore Posts: 847 Thanked: 2,802 Times View My Garage	Re: Shoving water inside an exhaust to clean it? Unless the water is allowed to go in completely, I don't understand how it can cause harm. Isn't it equivalent to driving in a flooded road where it is advised to keep the revs high so that water doesn't enter the engine? Also, aren't most bend pipes inclined towards the exit? So how can water defy gravity and go all the way up to the engine when it's running!
	() Thanks