In this month's Engine Shop in Model Aviation magazine he talks about using Dawn Power Dissolver to clean engines and also Evapo-Rust if your engine is actually rusted. Good article. I'm with Ed though, I can't see scrubbing on an engine when I can put it in a crock-pot and be done with it. A light, periodic cleaning ok, but I'm thinking if you find an engine at a swap meet for 5 bucks or something and you're going to completely disassemble it anyway. I think both methods have their merits and like they say..... to each his own.
<span style="white-space
re"> </span>I figure I'm going to go buy a bottle of DPD *and* a jug of Evapo-Rust because one can never have too much stuff sitting around in their shop they might want to give a shot when the time is right! LOL You know in your "spare" time....