My close friend, who was literally "Mr. Goodwrench" at a GM dealer told me
about their parts washer.  He described it as a "big ass" dishwasher.  (they
use some pretty colorful adjectives in the garage area) Super hot water, a
rotating platform, and quite a few high pressure jets inside a cabinet.

> What's the trick to getting the engine case  sparkling clean when
rebuilding
> ?  I have looked into this locally and have  been told by two engine
> rebuilding machine shops that the chemical dunk tanks  they normally use
are not good
> for aluminium.