Individual Parts - If the inspection has shown that the engine block cylinders and most of its components are in a condition that allows them to be used again, the most economical alternative is to purchase only the necessary parts and components. The cylinders, crankshaft and pistons/connecting rods should be examined very carefully. Even if there is only minimal wear on a cylinder, the cylinder bores should be ground.
Replacement of the piston group - if the inspection showed that all parts have significant wear, we recommend replacing the piston group with a new one, rather than buying parts separately. The piston group of the factory assembly includes sets of: pistons, rings (compression and oil scraper), piston pins.
Replace the connecting rods as a set. If necessary, if the connecting rods are not deformed or mechanically damaged, you can replace the bushings under the piston pin, but after replacement, you need to ream the hole to the required diameter (adjust it to the piston pin). After a thorough check, the crankshaft must be replaced or reground to the next repair size. Carefully consider which option is most suitable for your conditions, and discuss the situation with specialists from a workshop or auto store, as well as with more experienced craftsmen before ordering or purchasing spare parts.
It is much easier to disassemble and work on the engine if it is mounted on a portable stand. Such a stand can be rented for a very reasonable fee. Before installing the engine on the stand, the gearbox should be removed from it.
If you do not have a stand, you can disassemble the engine by securing it to the floor or table. Be extremely careful not to drop the engine when working on it without a stand.
If you intend to purchase a rebuilt engine, you will first need to remove all external components so that you can transfer them to the engine you purchase, just as you would if they were to be installed on an engine you decided to rebuild yourself.
CAUTION: When removing external components from the engine, pay close attention to all parts that may be useful during installation. Note the location of all gaskets, seals, bushings, studs, brackets, washers, bolts and other small parts.