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Urban myth, fact or fiction?
https://www.ausmini.com/forums/viewtopic.php?f=2&t=55395		 Page 1 of 3
Author:  NAV [ Wed Jul 22, 2009 10:12 pm ]
Post subject:  Urban myth, fact or fiction?
I've been told by someone that you can remove or reduce the amount of built up carbon in the cylinder by spraying a fine mist of water into the engine while it's running.

I'm curious to know.
Author:  drmini in aust [ Wed Jul 22, 2009 10:15 pm ]
Post subject: 
This is true, water injection has been around for years. Since I was a young 'un. :lol:
If you have a blown head gasket and water leaking in, or a crack in the head, that cylinder will have little or no carbon in the chamber.
Author:  Flute [ Wed Jul 22, 2009 10:18 pm ]
Post subject: 
So is it something you should do or not do?
Author:  Mick [ Wed Jul 22, 2009 10:18 pm ]
Post subject: 
I would wonder how long would you need to apply water mist to the inlet to get a result?
Author:  850man [ Wed Jul 22, 2009 10:23 pm ]
Post subject: 
I have also done this many times over the years using a spray bottle, it is amazing how well it works.
Author:  NAV [ Wed Jul 22, 2009 10:25 pm ]
Post subject: 
850man wrote:
I have also done this many times over the years using a spray bottle, it is amazing how well it works.

Works well enough to notice a difference in how the engine runs? or just how clean it becomes?
Author:  850man [ Wed Jul 22, 2009 10:36 pm ]
Post subject: 
It does get rid of all the carbon & crap caught around the valves in the chamber & on top of the piston so i does bring a tied engine back to life for a little while & it can stop engine "run on" in old oil burners. Its more well known for its cooling & anti knock properies in Turbo engines.
Author:  gafmo [ Wed Jul 22, 2009 10:56 pm ]
Post subject: 
yep how do you know the carbon is gone and is it just done on idle
Author:  sgc [ Wed Jul 22, 2009 11:04 pm ]
Post subject: 
gafmo wrote:
yep how do you know the carbon is gone and is it just done on idle


Run the engine at 2500 - 3000 rpm and spray a mist of water into the carb mouth. It'll belch steam and black soot for a while, when this stops you've cleaned most of the crap out ;)
Author:  Bubbacluby [ Wed Jul 22, 2009 11:38 pm ]
Post subject: 
Yeah i think i remember warrick Augustin saying this one time.

But by memory too much and you will brake your motor.
Author:  Angusdog [ Thu Jul 23, 2009 5:34 am ]
Post subject: 
I am definitely trying this when I get home.

Didn't Spitfires have water injection in their V12 Merlins?
Author:  Number86 [ Thu Jul 23, 2009 9:01 am ]
Post subject: 
I have tried this too on an old Bluebird that was pinging its ring off. The carbon deposits in the cylinder get hot and cause pre ignition. Worked well, did another 20k with no issues.
Author:  awdmoke [ Thu Jul 23, 2009 10:13 am ]
Post subject: 
It does work. Remember that you want a fine spray, a mist entering the carby intake while the engine is running at normal temperature.

Pouring water into the intake = bad
Author:  Archangel007 [ Thu Jul 23, 2009 2:47 pm ]
Post subject: 
Its basically just like steam cleaning.

Great to stop pinging on forced induction engines.
Author:  simon k [ Thu Jul 23, 2009 3:40 pm ]
Post subject: 
Archangel007 wrote:
Great to stop pinging on forced induction engines.


isn't that because it's cooling the piston and combustion chamber, rather than removing carbon deposits?

I'd do it on a motor I didn't care about, on a motor I cared about I'd just take the head off.... I don't like the idea of chunks of hard stuff bashing about in my cylinders :?
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