Tipping water down intake

[Downhillnz]

So in the last hour or so I have been watching people tip water down their intake in an attempt to clean the top end of their engine, mainly diesels.

Tip probably isn't the word, But ya know what I mean.

So this working on the same principle as water/meth... Has anyone tried it.

[geeves]

I have heard of this before but definitely do not recommend it. The chances of a mechanical darwin award are huge.
The therory is that the water increases compression loosening any carbon etc which then goes harmlessly out the exhaust. Also the cooling effect of the water increases this action.
In practise any carbon you do manage to dislodge in a healthy engine will be recreated in under 100km of running. That carbon is meant to be there. In an unhealthy engine the carbon will have a oil component so will not budge as effectively. Also its the intake and exhaust you want to clean not the cylinder and water has no properties here that help.
Add to that the fact that your combustion chamber is 1 tablespoon so this is the amount of water that earns that darwin award. Water can sit in bends in the system until you go round the first corner where it dumps a cuppfull into the engine followed by silence.
If you want to try it use a trigger bottle to apply the water I certainly will not try it

[Downhillnz]

So in that regard. Water meth running under load would have the same cleaning effect?

[geeves]

pass

[nb422]

So in that regard. Water meth running under load would have the same cleaning effect?

No i dont believe so, as the meth is combustible its more for the performance side. Plus as geeves said, its highly unlikely water in the intake would have any real cleaning effect on the engine anyway

[topgun94]

The meth combos in diesel are usually to increase performance and decrease EGT temps.