Re: steam clean an engine?
There are lots of old wives tales about what water will, and won't do in an engine...
Water injection used to be pretty common for lots of guys.
Some ran it to clean out the engine, some ran it to stop detonation with high compression engines with the cheap pump gasoline that was available at the time.
Years back I ran a twin turbo engine that was street driven and water injection kept the engine alive before the days of fuel injection.
The water kept combustion temperatures from being able to melt the cylinders down when the carb leaned out in progression form one stage to another.
If you want to do water cleaning of your engine, there are some 'Do's and Don't's' you must take heed of.
One is the amount of water you introduce into the engine.
Use a spray nozzle mounted over the carb, and have it aligned so both sides of the carb get water equally.
A windshield washer tank works well, with built in pump, metered delivery, and ready hose hookup points.
For cleaning, you will find a 50/50 mix of alcohol & water will do a better job.
While you are running down the road at highway speed,
mash the throttle and push the button on the tank pump.
You probably won't notice any difference in drivability except for more steam out the tail pipe...
A half gallon or so like this should do what you are asking.
Be sure to highway drive the vehicle for 15 to 20 minutes afterwards, or moisture will collect in the exhaust system and may help to rot it out...
Contrary to what most people believe, your engine sucks up lots of moisture already.
On a humid, or foggy day, you would be surprised how much just plain water runs out the tailpipe!
The water, or water and alcohol mix won't hurt any of your emissions hardware, no more than the moisture in the air, or alcohol in the gasoline today will.
The fuel today doesn't cause hard carbon deposits like the fuel of yester year when this was very popular.
It helped clean the engine, but carbon in the chamber wasn't the big deal.
Water injection sometimes helped to knock loose the carbon deposits that used to build up on the backs of valve heads, seriously hurting performance.
Oil on the back of the valve heads was a serious problem, now with better fuel, better fuel control (injection) and better machining, seal material and better designed oil control we don't have as much oil residue building up on the backs of valve heads either.
In a word, water injection is safe,
You limit the amount of water that gets into the cylinders.
Water injection is most effective if the engine us under a load at operating temperature and at highway speeds.
It's also a good idea to do it just before you are going to do an oil change the first couple of times...
You just won't believe what gets blown out/shows up in the engine oil the first few times.