I'm looking at a 98 Mazda 323 1.8L with a rebuilt engine. Basically, a mechanic bought it cheap due to shot rings and rebuilt the engine to sell it at a profit. He said it's the fifth engine he's rebuilt.

Is there anything I should look for to make sure he actually did the rebuild correctly? Any particular questions I should ask or tests I should do?

[All Rebuilt Engines are NOT Created Equal!](http://www.macysgarage.com/myweb6/Engine%20Rebuilds.htm)