RE: How to cleanup a used engine?
The dawn power disolver will work but can easily discolor the aluminum and your bare skin. $2.25 at wallyworld
Antifreeze in a crock pot (ON LOW!) will do an excellent job. Antifreeze will not hurt the rubber car parts it is in contact with but I normally soak just the metal parts. It should go without saying not to use the crock pot for food prep ever again.
Fred