92 Escort won't start....

Well...radiator had cracked @ the top hose, so I replaced the radiator. Now she won't start up. I'm thinking spark plugs, but I don't know if it's them. How can you tell? The car cranks...but it doesn't turn over and start. I'm thinking: air + fuel + spark = combustion...so it's either the fuel pump, fuel injectors, spark plugs, or intake manifold (which it isn't). Other than that....I have no clue. Any suggestions? Thanks.

take a spark plug out, after the wire. Connect the two. Set the plug connected on top the valve pan. Watch for spark. No spark? spark plugs, wires, coil pack, or EEC. IF you get no spark what so ever then test the wires, if there good, test the coil (its 500 bucks to replace)

well...by process of elimination...it isn't the plugs or injectors. any other suggestions? think that maybe the pistons or rings seized up or something b/c they may have overheated when the top hose of the radiator cracked? would i need a new motor if this is the case? help please!