Valve face angles
![](https://www.mazbook.ru/img/familia/0522.jpg)
Gasoline engines
![](https://www.mazbook.ru/img/familia/0523.jpg)
diesel engine
![](https://www.mazbook.ru/img/familia/0524.jpg)
Chamfer width and working surface
1. To check the working surface and the width of the valve face, the valve face should be covered with a thin layer "Preussischblau" (Prussian blue) or "Bleiweiss" (white lead). Insert the valve and press lightly on the bevel of the seat.
Attention! Do not turn the valve. If the color is not evenly distributed, the valve chamfer should be processed further. However, the maximum or minimum chamfer width must not be exceeded, see table of valve dimensions.
![](https://www.mazbook.ru/img/familia/0525.jpg)
Valve protrusion
2. After chamfering the valves, the valve protrusion -L- must be checked. If the value lies within -a-, the protrusion is normal, if the values lie within -b-, the protrusion should be adjusted by setting the washer so that the value -a- is reached. If the maximum value -b- is exceeded, the cylinder head must be replaced.
![](https://www.mazbook.ru/img/familia/0526.jpg)
Valve disc edge thickness and chamfer angle
Valve sizes
Engine designation | Values in mm | |||
Valve length | Valve face width | Thickness on the edge of the valve | Valve protrusion -L- | |
E1, E3, E5 | __ | 1,4 | Vp. 0.10 | a = 42.4 |
B3, up to 8/89 | __ | 1,1 — 1,7 | Vp. 0.50 Issue. 1.00 | a \u003d 39.0 - 39.5 b = 39,5 — 40,5 |
VZ from 9/89 | Vp. 103.84 Out. 104.94 | 0,8 — 1,4 | Vp. 1.00 Issue. 1.00 | a = 41.5 - 42.0 b = 42,0 — 43,0 |
AT 5 | __ | 1,1 — 1,7 | Vp. 0.50 Issue. 1.00 | a \u003d 39.0 - 39.5 b = 39,5 — 40,5 |
B6 TO 9/89 | __ | 1,1 — 1,7 | Vp. 1.00 Issue. 1.30 | a = 39.5 - 40.0 b = 40,0 — 41,0 |
B6 since 9/89 | Vp. 103.84 Issue. 104.94 | 0,8 — 1,4 | Vp. 0.90 Issue. 1.00 | Inlet a = 41.5 - 42.0 b = 42,0 — 43,0 Release a = 41.5 - 42.0 b = 42,0 — 43,0 |
BRE (SOHC) | Vp. 101.77 Issue. 102.97 | 0,8 — 1,4 | Vp. 0.65 Issue. 1.20 | Inlet a = 42.5 - 43.0 b = 43,0 — 44,0 Release a = 41.0-41.5 b = 41,5 — 42,5 |
BRE (DOHC) up to 8/89 | __ | 0,8 — 1,4 | Vp. 1.00 Issue. 1.00 | a = 43.5 - 44.0 b = 44,0 — 45,0 |
BRE (DOHC) since 9/89 | Vp. 101.34 Issue. 101.44 | 0,8 — 1,4 | Vp. 1.35 Issue. 1.45 | a \u003d 45.0 - 45.5 b = 45,5 — 46,5 |
WZE | Vp. 105.27 Issue. 104.17 | 1,1 — 1,7 | Vp. 0.50 Issue. 1.00 | a \u003d 39.0 - 39.5 b = 39,5 — 40,5 |
B6E | Vp. 103.77 Issue. 102.67 | 1,1 — 1,7 | Vp. 0.50 Issue. 1.00 | a \u003d 39.0 - 39.5 b = 39,5 — 40,5 |
PN | Vp. 101.50 Issue. 101.40 | 1,4 — 1,8 | Vp. 0.50 Issue. 0.50 | a \u003d 36.8 - 36.9 |