i wan't to make a small diesel generator. I've access to all of the machines.which are needed in this project.i know about how the engine works.i don't know how piston rings and piston seals the combustion chamber,how to make them.how much power will my generator will generate.i wan't to make this generator for my PC.
With respect, you're actually asking how to design and build your own engine. There are entire books on the subject, and you need plenty of diagrams as well. That's far beyond the scope of an answer on here. But if all you need is a 12v regulated dc power supply why not just get a model car or boat engine and see if you can hook it up to a car alternator from a scrapped vehicle via a suitable pulley gearing? It certainly won't be quiet though, and you'll need to ensure that the engine is either fan or water cooled and that there's a suitable exhaust outlet. Model diesel engines aren't very large, but there are larger scale copies of the old British Mills engine design made in India, and also various websites which give you details or sell you plans on how to build your own. Usually they have lapped pistons so don't need the complication of piston rings.
