Magentis and Optima repair since 2000 of release
1. Engines
1.1. Engines of 2,0 l of DOHC
1.2. Engines of V6 2,5 l
1.2.1. Specifications
1.2.2. Compression check
1.2.3. Adjustment of gaps of valves
1.2.4. Gear belt
1.2.5. Check and adjustment of a tension of poliklinovy belts
1.2.6. Tightening of bolts of fastening of a head of the block of cylinders
1.2.7. Head of the block of cylinders, valve and spring of valves
1.2.8. Engine support
1.2.9. Removal and engine and transmission installation
1.2.10. Camshafts
1.2.11. Hydraulic jacks of gaps of valves
1.2.12. Pistons and rods
1.2.13. Cranked shaft
1.2.14. Block of cylinders
1.2.15. Air filter of the V6 engine
1.2.16. Broad air chamber
1.2.17. Inlet collector
1.2.18. Final collector
1.2.19. Exhaust silencers
1.2.20. Search and elimination of malfunctions
2. Greasing system
3. Cooling system
4. Control and decrease in toxicity
5. Fuel system
6. Ignition system
7. Coupling
8. Transmission
9. Power shafts, axes
10. Suspension bracket
11. Steering
12. Brake system
13. Body
14. Central air
15. Electric equipment
16. Electric circuits
 










1-2-14-blok-cilindrov.html

1.2.14. Block of cylinders

Dismantling

Remove a gear belt, a head of the block of cylinders, a drive plate, a transmission, an assembly plate, the oil pallet and the oil pump.

Check

Block of cylinders

 PERFORMANCE ORDER

1. Visually check the block of cylinders on lack of a rust, corrosion, cracks or any other defects.

2. Measure diameters of cylinders in the opposite directions, in three levels on height of cylinders:

  • Level 1 – In a place an arrangement of a kompressionny ring No. 1 at piston installation in VMT;
  • Level 2 – in an average part of the cylinder;
  • Level 3 – at the cylinder basis.

3. If diameters of cylinders exceed admissible values, have ovality or a konusnost or a surface of cylinders is damaged or has development, the block of cylinders it is necessary to chisel and establish new pistons and piston rings of the repair size.

  • Nominal diameter of the cylinder: 84,00–84,04 mm
  • The most admissible ovality and cylinder konusnost: no more than 0,02 mm

4. If in the top part of the cylinder there is a step, cut off it the special tool.
5. As spare parts pistons of four increased sizes are delivered: 0,25, 0,5, 0,75 and 1,00 mm.
6. When boring cylinders till the next increased size, sustain a gap between the piston and the cylinder and be convinced that pistons have the same increased size. Measure external diameter of each piston at an angle 90 ° to a piston finger, at distance of 12 mm from a piston skirt.

Gap between the piston and the cylinder: 0,010–0,030 mm

7. Check the block of cylinders on absence of damages and cracks.

8. A metal ruler and shchupy in six directions check planeness of an interfaced surface of the block of cylinders.

  • Deviation from planeness: 0,03 mm
  • The maximum deviation from planeness: 0,1 mm

The Privalochny surface for laying of the block of cylinders after repolishing should reduce height of the block of cylinders no more than – 0,2 mm.

Boring of cylinders

 PERFORMANCE ORDER

1. Pistons of the increased size which should be used to be defined on the basis of the greatest diameter of an opening of the cylinder.

Increase in the size

Marking
0,25 mm
0,25
0,50 mm
0,50
0,75 mm
0,75
1,00 mm
1,00

Marking is beaten out on the piston bottom.

2. Measure external diameter of the piston.

3. On the basis of the measured size define the amount of boring. The amount of boring = Diameter of the piston + (0,01–0,03) – 0,01 mm
4. Chisel each of cylinders till the settlement size.

For an exception of change of the size from temperature in the course of a honingovaniye, process cylinders in sequence of operation of cylinders.

5. Honinguyte cylinders before receiving the demanded settlement diameter (external diameter of the piston + a gap).
6. Check a gap between the piston and the cylinder.
Gap between the piston and the cylinder: 0,01–0,03 mm

When boring, chisel all cylinders till one increased size. Do not chisel only one cylinder till the increased size.

Assembly

 PERFORMANCE ORDER

Establish details in the following sequence:

  1. Cranked shaft
  2. Drive plate
  3. Piston
  4. Head of the block of the cylinder
  5. Gear belt
  6. Forward cover with the oil pump

«on a step back
1.2.13. Cranked shaft
on the following page»
1.2.15. Air filter of the V6 engine