My 2002 Jeep Liberty blew a rod last week. My husband wants to get a mechanic to install a rebuilt engine. I found a mechanic to install a used engine from a salvage yard that guarentees its engine and the cost of labor for 90 days. This mechanic made a really good case to me for using a used engine. My husband is not convinced and still wants the rebuilt (which would be $1,000 more, but comes with three-year warranty, not including labor.)The used would be about $2,500, the rebuilt about $3,500. Help!