They have cast iron
Although smaller engines are made of cast aluminium in order to achieve lighter weight, bigger and powerful engines are made out of cast iron considering the strength and sturdiness. Particularly the cylinder blocks are made out of high-grade iron in order to tolerate high compression generated within and bear the heat. Generally, it is cast as a single piece in order to maintain the strength. This particular metal will be separated from the rest by the scrap yard people and melt it to form iron slabs or rods. This particular metal slabs will be reused by the manufacturers to make newer items. So, other than throwing away your engine, you can give sell it to a scrap yard and earn some money.
You can sell the catalytic unit alone
Although it is not a part of the engine, catalytic unit alone has a good value. Believe it or not, the catalytic unit has platinum in it and you should know that platinum is a precious metal. Separating the catalytic unit from the engine and selling it alone to a scrap yard in Australia will give you the opportunity to make good extra money. They have special methods to separate platinum from catalytic device Make sure that you go for a reliable and reputed scrap metal yard in Melbourne for a better value.