Posted by MarkB_MI on December 13, 2009 at 07:18:33 from (166.217.124.180):
In Reply to: Starting Fluid Harmful posted by mdjd4020 on December 12, 2009 at 19:31:50:
I've heard the story that ether "washes the oil off the cylinder walls" many times, but it doesn't stand up to any serious scrutiny. For that to happen, you must first accept the premise that ether exists in a liquid state in the combustion chamber, but that's a virtual impossibility: The fluid must vaporize before it can be inducted into the chamber. Once there, the temperature of the air charge would have to drop significantly for the ether to condense. And we all know that diesel engines rely on the heat generated by compressing the air charge for ignition, so the ether is simply not going to condense in the combustion chamber of a diesel engine.
Even if ether could exist in a liquid state in the combustion chamber, it's hard to see how it could clean the cylinder walls more effectively than diesel fuel; there's going to be a lot of unburned fuel in the cylinder after you crank an engine for a minute or two.
If there's any case where this would be true, it would be when starting fluid is used on a small gasoline engine. But again, how is a little liquid ether worse than raw gasoline, which you're going to get if you flood the engine?
I'll be the first to say that if you hit your engine with a healthy dose of starting fluid, preignition can destroy a piston in an instant. But the "washed cylinder walls" theory just doesn't hold water.
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