Audi 100/A6

1990-1997 of release

Repair and car operation

Audi 100/A6
+ 1. The maintenance instruction
+ 2. Maintenance service
- 3. Engines
   + 3.1.1.2. Technical characteristics
   + 3.1.2. 5-cylinder engines
   - 3.1.3. 6-cylinder engines
      3.1.3.2. A gear belt
      3.1.3.3. A head of cylinders
      3.1.3.4. Valves
      3.1.3.5. Replacement маслосъемных caps of valves
      3.1.3.6. Check of directing valves
      3.1.3.7. Fair processing of a landing facet of a saddle / the valve
      3.1.3.8. Grinding in of saddles of valves
      3.1.3.9. Compression check
      3.1.3.10. A poliklinovoj belt
      3.1.3.11. Greasing system
      3.1.3.12. The oil pump
+ 3.2. Diesel engines
+ 3.3. Removal and a partition of engines
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Systems of start, ignition
+ 9. Transmission
+ 10. Brake system
+ 11. Suspension brackets, a steering
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice

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

THE GENERAL DATA

Saddle of the inlet valve

Saddle of the final valve

The sizes of the valve

Saddles of valves with wear tracks or influences of process of combustion can to be processed, while as much as possible admissible size дообработки is maintained. If this size is exceeded, the hydraulic jack of a backlash 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 kind of a working surface. Saddles of valves can be under repair by means of usual tools of a workshop. For fair processing development are required. As the reference with these tools demands certain skill, work should be carried out in a workshop.

The prevention
Final saddles are supplied in addition by narrowing. At to processing necessarily pay attention to to damaging narrowing radius.

Definition of as much as possible admissible size дообработки

PERFORMANCE ORDER

1. The valve insert and densely press to a saddle.

2. Measure distance – and – between торцем a core of the valve and a plane of a contact surface of a head of cylinders.

3. Is minimum admissible values of distance – and (see in the table).
To receive as much as possible admissible size дообработки, it is necessary from the measured distance – and – to subtract its is minimum admissible value.
So:
(Е mm = the measured distance–) = (Е mm = is minimum admissible value of distance–) = (Е mm = as much as possible admissible size дообработки (b)).

Is minimum admissible values of distance – and

THE ENGINE

THE INLET VALVE

THE 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) the} Average inlet valve: 33,2 mm

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

THE ENGINE

THE INLET VALVE

THE FINAL VALVE

And =

39,2 mm (/)

32,4 mm (/)

With =

2,0 mm

2,4 mm

b – as much as possible admissible size дообработки (is calculated)

Z – the bottom contact surface of a head of cylinders

300 – the top adjustment corner

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

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