VW Sharan repair

. Diesel engines: 1,9 l of TDI.
+ 1. Introduction
- 2. VR6 engine
   + 2.1. Cнятие and installation
   + 2.2. Dismantling and assembly
   + 2.3. Head of the block of cylinders and valves
   - 2.4. Pistons and rods
      2.4.1. Removal
      2.4.2. Measurement of internal diameter of the cylinder
      2.4.3. Check of pistons and rods
      2.4.4. Measurement of a gap of the bearing of a rod
      2.4.5. Assembly of pistons and rods
      2.4.6. Installation of pistons and rods
   2.5. Block of cylinders
   + 2.6. Cranked shaft and radical bearings
   + 2.7. Drive of the mechanism of a gazoraspredeleniye
   2.8. Intermediate shaft
   2.9. Compression check in engine cylinders
   + 2.10. System of production of the fulfilled gases
+ 3. Two-liter engine (ADY)
+ 4. System of greasing of the engine
+ 5. Cooling system
+ 6. System of injection of fuel of the VR6 engine
+ 7. Simos system of injection of fuel of the 2,0-liter engine
+ 8. Ignition system
+ 9. Coupling
+ 10. Mechanical 5-step transmission
+ 11. Shaft of a drive of wheels
+ 12. Hydraulic booster of a steering
+ 13. Forward suspension bracket
+ 14. Back suspension bracket
+ 15. Brake system
+ 16. Electric equipment
+ 17. Diesel engine
+ 18. System of greasing of the diesel engine
+ 19. System of cooling of the diesel engine
+ 20. Power supply system of the diesel engine and turbokompressor
+ maintenance Card
+ Specifications and characteristics
+ Elektroskhema

Repair Sharan/Sharan Volkswagen>> VR6 engine>> Pistons and rods>> Measurement of internal diameter of the cylinder

Fig. 60. Scheme of measurement of internal diameter of the cylinder: 1, 2 and 3 — the top, average and bottom belts of the cylinder; And, In — the cross-section and longitudinal directions of measurement

Check, whether exceeds wear of cylinders the most admissible — 0,08 mm. For what measure internal diameter of the cylinder by the special measuring device — nutrometry in three belts — in the top, average and bottom parts of the cylinder (fig. 60) both in cross-section, and in longitudinal the engine directions.
At measurement of the top and bottom belts of the cylinder it is necessary to recede on 10 mm from their edges. Thus, at measurement of internal diameter of the cylinder, it is necessary to carry out six measurements on each cylinder.
All received values should be written down and compared to the sizes specified in the table of adjustments and control. If the maximum size of wear at least one of cylinders more than 0,08 mm — chisel all cylinders till the next repair size.
For determination of size of boring of the cylinder measure diameter of the piston, to the received value add 0,03 more mm, at the expense of piston palpation at its course and, besides, add 0,02 mm for a final honingovaniye of the cylinder.

Fig. 61. Measurement of diameter of the piston

The piston has a difficult form of an external surface. Therefore diameter of the piston by a micrometer at distance of 6 mm from edge of a skirt of the piston and at right angle in relation to openings for a piston finger (fig. 61) is measured .
The difference between the measured diameter of the piston and its nominal rate should not exceed 0,04 mm, otherwise it is necessary to establish the piston with the increased diameter — the repair size. For the VR6 engine pistons of the repair sizes are produced from the increased on 0,5 and 1,0 mm in diameter.
For check of palpation of the piston at its course measure diameter of the piston and internal diameter of the cylinder. Calculate a difference between the received sizes for each cylinder. If the difference is more than 0,08 mm, cylinders should be chiseled, as palpation reached limit of wear.