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4.1.16.3. Check of pistons and rods

Before check of pistons with rods remove piston rings from pistons and carefully clear pistons.

For removal of piston rings from pistons unclench a ring and insert under a ring evenly on a circle two or three old edges of the probe and on them shift a ring from the piston. Be careful, do not scratch the piston the ends of a ring. Rings very fragile can also burst if to unclench them very strongly. Working edges of piston rings very sharp therefore handle with them very with care not to be cut. You hold each set of rings together with pistons for repeated installation them on the places.

PERFORMANCE ORDER
1. Clear all traces of a deposit from the top part of the piston.
2. Remove a deposit from flutes under piston rings in the piston, using an old piston ring.
3. After removal of a raid clear the piston with a rod the corresponding solvent and wipe dry.
4. Carefully examine each piston on existence of cracks around a skirt and openings under a piston finger.
5. Check wear on a skirt of the piston, an opening in a piston head, and also existence of a prozhog in the top part of the piston.
6. Traces of pointed corrosion on the piston specify that cooling liquid got to the combustion chamber. It is necessary to find the reason of hit of liquid in the combustion chamber and to eliminate it.
7. Measure diameter of the piston.
8. Define a piston gap in the cylinder for what from diameter of the cylinder take away diameter of the piston and divide into two.
9. Check each rod for wear and existence of cracks, and also distortion of a form.
10. Rods usually do not demand replacement if before it there was no jamming of the engine.