Before you remove the piston and connecting rod, take out the timing chain. Make sure to mark where the connecting rods and rod caps are and if the arrows on the pistons aren't visible, indicate which way the pistons point during reinstallation. First, unbolt the connecting rod and its bolt cap, then gather the loose parts out of the engine so there is less chance of damage. Make sure the piston pins fit the pistons, remove the rings from the pistons, press off the pins inside the piston and pull the piston off the connecting rod. Examine the parts you can reuse for any injury and switch them out if needed. Watch for deforming or twisting in the connecting rods, check the large end to see if it's fine and smooth out any blemishes with an oil stone. Look into the pin bore in the small end of the connecting rod to make sure there are no scratches or rough edges. Spins should be opposite and nicks or scuffs shouldn't be apparent on piston surfaces or inside the piston and ring grooves. Push the piston over the connecting rod, set the piston pin in place by hand and place both ends of the snap rings. Replace the piston rings whenever they are worn, then add a small amount of oil and place the piston/connecting rod unit into a ring compressor. With a wooden drift and a mallet, push the piston into the cylinder so that the oil-drilling inner shell in the connecting rod lines up with the bearing shell. Anti-twist locks from the bearing shell must be inserted into the slots found on the connecting rods and caps. Make sure the connecting rod caps line up with the marks, add the connecting rod bolts, tighten the bolts to 5 Nm, then to 25 Nm and finally rotate them 90° clockwise. Check how easily the engine rotates and then fit the timing chain.