2.9.15.4. Survey and restoration of cylinders in the block

 PERFORMANCE ORDER

  1. Check openings of cylinders in the block for conicity, ovality, teases and scratches. Begin with careful survey of the top part of openings. If they are worn-out, on their persistent party the small crest which notes the top level of the movement of a piston ring is formed. The owner of the car easily learns about wear of a mirror of cylinders even before dismantling of the engine. The excessive consumption of oil and blue smoke from system of release are sure signs of wear of cylinders and piston rings.
  2. Measure diameter of the cylinder under "a wear ring" a micrometer and compare it to diameter at the cylinder opening bottom where the cylinder does not wear out. If the difference between two measurements exceeds 0,15 mm, it is necessary to chisel cylinders and to put pistons of the repair size.
  3. Openings of cylinders have to be processed so that to provide an optimum working gap with new pistons of the repair size. The difference in weight between any two from six pistons should not exceed the limits specified in technical characteristics.
  4. If openings in cylinders are slightly worn-out, but not so that they needed to be chiseled, it is possible to establish special oil scraper rings and pistons which will restore a necessary compression and will suspend oil waste in the engine. For this purpose there are several various sizes of repair details, and it is necessary to adhere precisely to indications of firm manufacturer on their installation.
  5. Look whether is not present in the block of cylinders and a case of cracks and other damages, and also be convinced of passability of all water and oil channels. Check reliability of fixing of all laying of covers on a case and the block of cylinders. If any laying raises doubts or has a leak, unscrew screws of fastening of a cover and remove it. Clear a cover and a landing surface, put new laying, insert and tighten screws. Check whether there is no leak through cooling shirt traffic jams.