Audi 100/A6

1990-1997 of release

Repair and car operation

Audi 100/A6
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   + 3.1.1.2. Technical characteristics
   + 3.1.2. 5-cylinder engines
   - 3.1.3. 6-cylinder engines
      3.1.3.2. Gear belt
      3.1.3.3. Head of cylinders
      3.1.3.4. Valves
      3.1.3.5. Replacement of maslosjemny caps of valves
      3.1.3.6. Check of directing valves
      3.1.3.7. Fair processing of a landing facet of the saddle / valve
      3.1.3.8. Grinding in of saddles of valves
      3.1.3.9. Compression check
      3.1.3.10. Poliklinova belt
      3.1.3.11. Greasing system
      3.1.3.12. Oil pump
+ 3.2. Diesel engines
+ 3.3. Removal and partition of engines
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Systems of start, ignition
+ 9. Transmission
+ 10. Brake system
+ 11. Suspension brackets, steering
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice

3.1.3.7. Fair processing of a landing facet of the saddle / valve

GENERAL INFORMATION

Saddle of the inlet valve

Saddle of the final valve

Sizes of the valve

Saddles of valves with wear tracks or influences of process of combustion can to be processed, while the most admissible size of a doobrabotka is maintained. If this size is exceeded, the hydraulic jack of a gap in a drive of valves ceases to carry out the functions. In this case it is necessary to replace a head of cylinders. Saddles of valves always to are processed so that to provide a faultless type of a working surface. Saddles of valves can be under repair by means of ordinary tools of a workshop. For fair processing development are required. As the handling of these tools demands a certain skill, work should be carried out in a workshop.

Prevention

Final saddles are supplied in addition with narrowing. At to processing surely pay attention to damaging narrowing radius.

Determination of the most admissible size of a doobrabotka

PERFORMANCE ORDER

1. The valve insert and densely press to a saddle.
	2. Measure distance – and – between a torets of a core of the valve and the plane of a contact surface of a head of cylinders.
3. Minimum admissible values of distance – and (see in the table). To receive the most admissible size of a doobrabotka, it is necessary from the measured distance – and – to subtract its minimum admissible value. So: (Е mm = the measured distance – and) = (Е mm = minimum admissible value of distance – and) = (Е mm = the most admissible size of a doobrabotka (b)).

Minimum admissible values of distance – and

ENGINE	INLET VALVE	FINAL VALVE
2,8 l (30 valves)	32,2 mm ¹⁾	33,0 mm
2,6/2,8 l (12 valves)	33,8 mm	34,1 mm

¹⁾ Average inlet valve: 33,2 mm

Corner and width of a landing facet of a saddle of the valve

ENGINE

INLET VALVE

FINAL VALVE

and =

39,2 mm (/)

32,4 mm (/)

with =

2,0 mm

2,4 mm

b–the most admissible size of a doobrabotka (is calculated)

Z–bottom contact surface of a head of cylinders

300-top adjustment corner

450-corner of a facet of a saddle of the valve

6-cylinder petrol engine: and = Max. 3,5 mm; b= minute of 0,5 mm; and = 450.