Turn the crankshaft so that the crankpin of the corresponding cylinder is set to the TDC position.
Lubricate the surfaces of the piston rings and piston with a small amount of engine oil, put protective tubes on the connecting rod bolts.
Using a piston ring compression mandrel, install the piston into the cylinder in accordance with the marks (according to cylinder type and installation direction).
(The original article is on mitsubishiman)