Pistons and connecting rods — removal (Hyundai Elantra J1)

Caution: Before removing the pistons and connecting rods, remove the cylinder head.

Check with your fingernail to see if a bead has formed at the upper limit of the piston ring stroke (approximately 5 mm below the top of the cylinder). If rollers have formed due to carbon deposits or wear on the cylinder walls, they must be completely removed using a special device. If you do not remove the rollers, the piston may be damaged when removing the pistons with connecting rods.

Once the rollers have been removed, turn the engine over.

Loosen the mounting bolts and remove the oil pan (1) with the gasket.



Remove the oil receiver (arrow).



(This article is based on information from the website hyundaibook.ru)



Remove the oil pump.



Remove the back cover (1).



Before removing the connecting rods, check their side clearance using feeler gauges. Insert them between the first connecting rod and the crankshaft until all the play is removed. If the clearance exceeds the maximum repair value, then it is necessary to replace the connecting rods. If new connecting rods are installed (or a new crankshaft), the clearance may become less than the minimum allowable. In this case, you need to machine the connecting rods - if necessary, consult a car repair shop. Repeat the procedure for the remaining connecting rods.



Check for identification marks on the connecting rods and connecting rod caps. If they are not visible, use a small center punch to make the appropriate number of marks on each connecting rod and cap (1, 2, etc. according to cylinder number).







Loosen each connecting rod cap nut in several half-turn increments until they can be turned by hand. Remove connecting rod cap number 1 together with the bearing shell - do not drop the shell.

Place a piece of plastic or rubber hose over each connecting rod cap bolt to avoid damaging the crankshaft journal and cylinder bore when removing the piston.

Remove the bearing shell and push the connecting rod and piston out through the top of the engine. Push by pressing the wooden handle of the hammer against the connecting rod or piston.

Repeat this operation for the remaining connecting rods with pistons.

Assemble the connecting rods by installing the bearing shells and caps, and tighten the nuts with your fingers.