add it to the oil.
No it does not.
I dont think you can flush sealent from the engine unless its disasembled and possibly hot tanked. The sealent is going to be hard to break down without drastic measures in most cases. Hot tanking...
Add this to your search engine:http://wiki.answers.com/Q/TEST[replace test with whatever you are supposed to use]
yes it is so make sure it all serviced as interferance engines run tighter than common engines so if one thing goes the whole lot goes.
An engine is a type of machine. Machine is a more general term and would include electric, mechanical or electronic devices.