Toyota 13101-0P020 Piston Sub-Assy, W/Pin

Before disassembling the piston and connecting rods, one has to address the cylinder head as well the oil pan. First, make sure to search for crest on the piston top, by traveling the ring at the highest point of cylinder if the crest is found it must be scraper off using a scraper tool. After you have remove the ridges, rotate the engine in such a way that the crankshaft is on top. And on the other side of the connecting rod, measure the connecting rod endplay with feeler gauges to established whether it is beyond the service limit; if so, likely new connecting rods are needed. Identify which connecting rods and caps are for which cylinder, and then remove the connecting rod cap bolts and pull out the connecting rod cap and the bearing insert without dropping the insert. Pry the connecting rod and piston assembly out through the top of the engine, If it is tight, give it a couple of whacks with the hammer handle. Record the diameter of each of the connecting rod bolts and replace all bolts that are of a smaller diameter than that specified. Link up the caps and inserts with past inserts remaining intact to shield the bearing surfaces. Now it is time to inspect and possibly replace the piston and the category of parts referred to as the connecting rods. When changing the piston rings, ensure the end clearance is adequate and that the side play of the piston ring is correct. Spear out the pistons/connecting rods and new rings beside each other in order to match them when installing. Put the top ring into the first cylinder and check the end gap with feeler gauges and correct it if the needed. It then fits the first compression ring which is the oil control ring then the second and third one in the correct position. Before installation, degrease the cylinder walls and edge to clean them, and also making sure the crankshaft is fitted. New bearing inserts are immersed in the new main bearing oil and are without lubrication installed into the connecting rod and cap. Space them in the piston 90 degrees apart, wet the piston and the rings and use a ring compressor during the installation. Place the piston/connecting rod assembly into the cylinder, and better yet, do not force the matter either. After that, using Plastigage, the following should be checked: Crankshaft connecting rod bearing oil clearance , size and condition of the bearing inserts. Remove any Plastigage remaining on the crankshaft journal, lubricate the thrust or main bearing faces with Grease or assembly lube and replace the rod cap with the bolts tightened to factory recommended torque. For the remaining assemblies, clean and check the orientation in the same manner as the first one and continue adding assemblies in the same way. At last, turn the crankshaft to check for any tight-pin and also check the connecting rod end-play again and adjust if required.

Cut a piece of Plastigage and lay it on the number one connecting rod journal, then install the rod cap and tighten the bolts.