You take all the spark pugs out so there is no compression. Then you get about a 3 feet long breaker bar with a socket to fit the nut on the big pully on the front, lower, center of the engine. Put the socket on the nut and pull on the breaker bar. If it moves it is not seized. If it wont move no matter how hard you pull then it most likely is seized.
I have changed my gear box n started ma car it sounded loader than normal I got 2 the end of my street n cut out n it want restart or tick over its js makeing a clicking sound wen I turn the key iv put the battery on charge 4 3 hours n fitted it bk on the car n want 2 try n start it it sounds like it want 2 start n wnts 2 tick over but isent what cud it b