The usual reasons for rebuilding an engine are loss of compression, excessive oil consumption, or excessive oil clearances. The symptoms of loss of compression are extended cranking, lack of power, or a misfire. All of these symptoms can be caused by lack of compression, but they can also be caused by other things, so before the engine is rebuilt it should be diagnosed by performing a compression or leakdown test.
Our best advise is to have a full vehicle inspection done before having the engine repaired, then consider the total projected cost of the engine plus any needed maintenance and repairs. Consider whether you like your car or not and the cost of buying a new or used car you would like. If you have any questions, one of our members will gladly answer your call.