Since Ive been working on our fuel trucks at the airport, i thought i would chime in on this... we were having problems with the truck, turns out to be a couple bad lifters... but at first we tried this out, one of the guys there is what i would call an 'old school' mechanic. So he pured the water down the carb, and man, seeing the way that truck reacted with it's big old Ford engine, sputtering, shooting out nasty smoke out its a$$pipe, etc... I would NEVER personally do this to my baby, with an aluminum engine. now I dont claim or have in depth knowledge of metal structures, but I do know aluminum is much more tempermental and sensative to heat/cold shocking it. If you want to clean something, just buy a product designed to do it, or hell, if its that important to you, clean it by hand! Just for the sake of your motor, if you dont know exactly what your doing, dont go pouring cold water into it... Just my somewhat edukated opinon.... Peace! -Nick
