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Old 08-15-2002, 09:46 PM
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I do agree that pouring water or and other thing down your carb is probably not a good thing, but I have changed a thousand blown headgaskets on a thousand cars in my career and every one of them had the most shiny and brand new looking piston top and combustion chamber from running with the steam in it. All the other cylinders would have carbon in them but not the one with the leak.

Just what I have seen, your results may vary. (but I doubt it!)

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  #17 (permalink)  
Old 08-16-2002, 04:14 AM
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Well I'll definately agree that you can always tell which cylinders were leaking by the nice clean pistons. But I wonder if that's a result of the anti-freeze properties or would it create the same result if it was straight water.
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Old 08-16-2002, 07:27 AM
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DMorris, I also remember when the thing to do was pour trans fluid in carb,60s-early 70s. It was supposed to clean carbon from everything. Also remember running 4 quarts oil and 1 quart trans fluid in engine to prevent sludge. Don't know how well all this worked but I did put 200,000 on a 66 289 before I sold it. Still had good power and used no oil between changed
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Old 08-16-2002, 12:53 PM
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Here is a quote from the Corvair Forum concerning the water decarboning.

"Posted by Ken Schifftner on August 16, 2002 at 13:26:45.

In Reply to: Re: Water in the carb debate posted by Matt N. on August 16, 2002 at 10:11:54.

I certainly agree with Matt.

We've done the water cleaning trick a couple or three times at the Coyote Club meetings. We even came up with a fogger nozzle that blows a mist into the carburetors (if the idea of pouring water slowly into them makes you squeamish). You don't want to hydraulically lock the engine with water.

What actually happens, I'm told, is that CO (carbon monoxide) is produced more than any blasts of steam. This technique is also used (sometimes with ammonia addition) on incinerators to help burn out carbon. Since extra CO is produced, you should certainly do this outdoors.

It does work.
An old mechanic who lived near me in NJ when I was growing up would start every tuneup with, first, an inspection of the plugs, then he'd replace them and do the decarbon ritual."
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