Execution order
1. Heat the piston 7 (see fig. Crankshaft and connecting rod and piston group parts), placing it for 2–3 minutes in water heated to a temperature of 50–80°C.
2. Quickly insert connecting rod 10 into hot piston 7 and press in pin 4. Insert retaining rings 8. Make sure that the arrow on the piston head and the lugs on the connecting rod and connecting rod cap are pointing in the same direction.
3. Before installing new piston rings, measure the gap in the ring lock of each ring, inserting them into the cylinders as described above. If the gap is less than the nominal (for compression rings 0.3–0.45 mm, for oil scraper rings 0.25–0.5 mm), file down the ends of the rings. The word "TOP" is engraved on the piston rings; the rings must be installed with this word toward the piston head. The piston ring locks should be evenly spaced at an angle of 120° from each other.
4. Install connecting rod bearing liners 2 into connecting rods 10 and caps 11 so that the protrusion of the liners fits into the recess of the connecting rod or cap.
5. Lubricate the cylinders and pistons with engine oil and insert the pistons into the cylinders so that the arrow on the piston head points forward toward the camshaft drive belt.
6. Lubricate the bearings and journals of the crankshaft with engine oil and install cover 11 on connecting rod 10 so that the cylinder number on the lower head of the connecting rod and the number on the cover are on the same side. Insert the connecting rod bolts, tighten the nuts and tighten with torque in two stages: Stage 1 - 30 N·m (3.0 kgf·m); Step 2 – tighten further by a quarter turn (90°).
7. Turn the crankshaft to make sure it rotates easily.
8. Install the remaining pistons and connecting rods in the same manner.
9. Check the side clearance between the lower connecting rod head and the crankshaft web with a feeler gauge. It should be 0.37 mm.
10. Install the oil pump, cylinder head and camshaft drive belt.