If your engine is really seized, then you are in a bit of trouble. If it is your car engine, this is a major repair job. If it is an engine on a lawn mower, or motorcycle, it is still a major repair, but something you may be able to tackle yourself. The first thing you need to determine is if your engine actually is seized. For more guidance on determining this, go here:
. http://www.kartsport.org.nz/technical/engine_seizures.htm