[titantn24]

To answer your question, yes, the engine from a '96 DX will fit in your '97 EX. However, the engine from the DX is a D15Y7 which is a non-VTEC engine and only produces about 106 horsepower. The engine that was originally in your '97 EX was a D16Y8 which is a VTEC(Variable valve Timing and lift Electronic Control) engine and produces about 127 HP. So if you main goal is to just have an engine that will fit into your Civic and run, the D15Y7 will be fine. But if I were you, I would try to find another D16Y8. Try looking on ebay. They are all over the place. Better yet, go for a B18C series and get anywhere from 170 HP to 200 HP. Just my opinion, but now you have the info. you need. Is the tranny(transmission) still in good shape? If so, stick with the D16Y8. If you go with the B series, you will have to swap out your tranny too. B series engines are more expensive and a tranny swap will just add more $$$. Hope this helps. Be careful who you trust to do the work this time.