Pistons and connecting rods — removal and disassembly [Toyota Carina T170]

The parts of the crank mechanism together with the pistons and connecting rods are shown in Figure 313. To remove the pistons and connecting rods, it is necessary to remove the cylinder head and oil pan (as well as an oil pump), however, the crankshaft can be left in the cylinder block. The pistons and connecting rods are then pushed upwards with the handle of a hammer from the inside of the cylinder block, after the connecting rod bearing caps and bearing shells have been removed. Before carrying out this work, it is necessary to familiarize yourself with the instructions regarding markings, installation position, etc., given for gasoline engines.



To separate the pistons from the connecting rods, remove the piston pin retaining rings. Then place the piston in hot water (at least 80°C) and knock it out using a suitable punch and hammer. Remove the piston rings with piston ring pliers. Check the pistons and connecting rods in the same way as on petrol engines, but taking into account the values given in the tables of sizes and adjustments. The connecting rod bearing shells are selected in accordance with the tolerance values. The bearing shells are marked with the numbers 1, 2 or 3 and the same number is stamped on the outside of the connecting rod bearing caps. It is imperative to ensure that both markings match.