Call me crazy or maybe not,

Has anyone tried using a mist bottle of hot water to clean carbon deposits from a running engine. The thought occured to me that it might be possible to mist water into the carb to clean the intake valves and pistons....sort like pouring tans fluid throught the carb while racing the engine.
What got me thinking about this, is seeing how clean a combustion chamber gets when you blow a head gasket-and getting coolant into a cylinder. I've seen this happen to several engines and there didn't seem to be any real damage caused by the coolant/water.....but man what a clean shinny combustion chamber.
Am I nuts for considering this, or has it been done and I've been sheltered all my life?

David

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65 CORONET 4DR

SAME CAR BUT I REINVENTED MYSELF

This is a common mechanic trick, using a mist bottle and adding it to a high idle setting engine with it warmed up, the only thing that may be bad is if you have some major carbon 'chunks' instead of 'soot', if you knock one loose, it won't be good for the valve it sticks open...

I've used it on slants and 318's and 383/400's with no problems, just remember moderation is best...

-D.Idiot

Yep, this can help clean out the combustion chamber. The water flashes into steam with great pressure, and the shockwave created can break off and break up chunks of carbon so they can be blown out the exhaust. A light, tentative spray mist of water isn't really enough to do the job, though; it actually takes more water than you would think the engine can tolerate. Make sure the engine is fully warmed up and running at a very fast idle (2000 rpm or so), then dribble water down the carb from a hand-held jar. Or, alternatively, you can disconnect and extend the choke pull-off hose and use it to let the engine take "slurps" of water from your jar. The engine speed will drop with every slurp; let it return to high idle before taking another slurp. Then let the engine run at the fast idle for a couple of minutes "dry" before letting it return to normal slow idle and shutting down.

I've done this water treatment prior to using Kreen; the combination seems to work pretty well.

(Or you could just run a couple cans of BG 44K through the engine via the gas tank...)

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I did water down the carb of my 360 and Mopar combustion chamber cleaner. I was going to swap heads and figured the intake oil leak caked up and ruined the valves. I didn't want to spen time scraping the piston tops. It worked good.

Part stores sell Seafoam cleaner.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

I recommend driving the car for a few miles at high rpm right afterward to help get any large carbon chunks through there. Just leave it in second gear, and drive it at around 3K rpm. If it starts to miss, don;t let up, but just keep driving through the miss.

Just in case you might consider generalizing this therapy for newer vehicles, I might recommend against trying this on a vehicle with a catalytic convertor. I did this on a Buick with one once, and it turned bright red under the car. I quickly stopped, and took the car for a drive to cool it off. It seems the avalanche of carbon might be too much for them.

Sam

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I have dribbled water with good results and also used Seafoam with good results. With Seafoam, just pour it in the gas tank and let it do it's job. Good maintenance item. It also gives you quite a bit of extra punch.

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Aggressive Ted

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74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG