| 1. Before check of pistons with rods remove piston rings from pistons and carefully clear pistons. |
| 2. For removal of piston rings 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. |
| 3. Clear all traces of a deposit in the top part of the piston. |
| 4. Remove a deposit from flutes under piston rings in the piston, using an old piston ring. |
| 5. After removal of a raid clear the piston with a rod the corresponding solvent and wipe dry. |
| 6. Carefully examine each piston on existence of cracks around a skirt and openings under a piston finger. |
| 7. Check a condition of the piston for existence of wear on a piston skirt, existence of openings in a piston head, and also existence of a prozhog in the top part of the piston. |
| 8. 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. |
| 9. Measure diameter of the piston. |
| 10. Define a piston gap in the cylinder for what from diameter of the cylinder take away diameter of the piston and divide into two. |
| 11. Check each rod for wear and existence of cracks, and also distortion of a form. |
| 12. On all petrol engines piston fingers are pressed in the top head of a rod therefore replacement of rods needs to be made in специализиро a bathing workshop. |
| 13. Check that the piston easily and freely turned on a piston finger. |
14. Install the top sealing ring in the first cylinder and the bottom of the piston push it in the cylinder to the cylinder basis.
Prevention
 Top and average condense telny rings are various. External surface of an average ring conical.
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| 15. Using the probe, measure a gap in the lock of a piston ring (see rice. Measurement of a gap in the lock of a piston ring). |
| 16. Repeat process of measurement with the ring established in the top part of the cylinder and compare results of measurement to specifications. |
| 17. If a gap in the ring lock too small, it it is necessary to increase, soshlifovyvy ring end faces. |
| 18. If a gap in the ring lock too big, check correctness sootvt stviye of rings to your engine. |
| 19. Repeat operation of check for each ring in the first cylinder, and then for rings in other cylinders. |
| 20. Install piston rings on pistons in the same way, as well as at removal. |
| 21. After installation of piston rings check ease of movement of piston rings in flutes of pistons for pistons. |
| 22. Put locks of an oil scraper ring so that the lock of the lower ring was displaced on 25 – 50 mm from the lock of the central part to the right, and the lock of the top ring was displaced on the same distance from the lock of the central part to the left. |
| 23. Install the lower compression ring on the piston, at the same time keep in mind that the ring in section has the conical form. Establish a ring by a tag of TORAHS up. |
| 24. Establish the top compression ring, at the same time the lock of a ring has to be turned on 180 ° in relation to the lower compression ring. If the conical ring is established, establish it by smaller diameter up. |
| 25. At installation of new piston rings cylinders need to be otkhoningovat. |
