YOU SAID:
The engine's dragon for was an engine fire dragon.
INTO JAPANESE
エンジンの竜はエンジンの火竜だった。
BACK INTO ENGLISH
The dragon of the engine was the fire dragon of the engine.
INTO JAPANESE
エンジンの竜はエンジンの火竜だった。
BACK INTO ENGLISH
The dragon of the engine was the fire dragon of the engine.
That didn't even make that much sense in English.