Using water to clean the combustion chambers

[Webslinger60]

What do you guys think of running water through the engine to clean the combustion chambers? Lets say you suspect a sticky valve, due to sludge on the top side & not closing 100%.

I’ve gotten a few different opinions.
One mech used to actually pour water into the carb at fast idle, with no problems. Then again my dad saw a guy blow an engine using just an eye dropper.The safest way I was told was to use a spray-bottle on “wide/mist”, and no more than a quart.

Then again, wouldn’t water just clean the underside/combustion-side of the valve and NOT the top where the sludge is?

I was also told to used GM’s “Top engine cleaner" "Seafoam" or other things. Im not crazy about solvents. A little sludge on hi-mile rings is not a bad thing. If you dis-lodge it, the cylinder may start to smoke.