Quote:
Originally Posted by ConnClark
Even with a proper water injection systems you must be careful.
You must allow the engine to get up to temp before you turn it on and allow sufficient time for the engine to run with out water injection
to boil off any water that has been mixed in with your oil before you shut the engine down.
Any water that enters the cylinder in liquid form will absorb heat from the combustion.
To much water and it will prevent all the water from boiling and it will reduce exhaust temperatures to the point the water will condense in the exhaust.
... rust inhibitors....
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Ahem! Your comments don't indicate a working knowledge of water VAPOR and the IC engine;ie, you indicate a need to purge the engine prior to shut-down ( this is quite true) but "getting the engine up to temp. before you turn it on" does not apply when water VAPOR is the medium added. Vapor is a gas, and behaves as such. A supersaturated vapor is like a cocked gun...nothing happens unless the trigger ( in this case, temperature drop) is pulled. Do you have any idea how hot a compressed air/fuel charge gets prior to ignition? Ask Dr. Diesel.
"Boil off any water that has been mixed in with your oil before you shut the engine down." Where is this additional water gonna come from? From the combustion process? That process makes lots of water vapor , anyhow. Are you saying a "normal" amount of water vapor (lots) is OK? Or, all of it must be removed? Does anyone do this now? I think not. More than 3 miles traveled or so and the oil is very hot on shutdown, anyhow. In a sealed atmosphere, it's going to the bottom of the oil pan when the oil cools. Isn't this one of the reasons behind changing the oil periodically? Condensate, acids, carbon particles, and such.
" Any water that enters the cylinder in liquid form will absorb heat from the combustion." Water in liquid form is dangerous! Liquid water does not compress...and hydraulic locking will occur...breaking aluminum piston crowns and cast iron (rings) ... and bank accounts.
"To (sic) much water and it will prevent all the water from boiling..." and something about the exhaust system. This comment makes no sense at all. Boiling is not the issue, here. Boiling occurs at 100 degrees C and standard pressure. Not gasoline combustion environs.
I trust the readership sees this. Handled properly, water VAPOR is a piece-of-cake ( except when it freezes! Then, throw money at it...called denatured alcohol - anti-freeze). Rusting is not the problem most people envision. Water vapor is a gas! Did you choke on that water you inhaled? It's there.... called R.H. (humidity).