1. Examine each valve on detection of the following defects:
– damages or deformation of a core of the valve;
– damages of a plate of the valve;
– damages or non-uniform wear of an end face of a core of the valve. |
|
2. Check width of a facet at an end face of a core of the valve. If necessary repair or replace the valve. Width of a facet:
Inlet valve: 1,0 mm
Final valve: 1,0 mm
|
| |
3. Measure length of each valve. |
|
Length of the valve, mm
|
A5D
|
A3E
|
|
Inlet valve
|
The nominal
|
96,450
|
104,950
|
|
The minimum
|
96,250
|
104,750
|
|
Final valve
|
The nominal
|
95,550
|
103,450
|
|
The minimum
|
95,350
|
103,250
|
|
|
4. By a micrometer in several places on height measure diameter of a core of the valve. |
|
Diameter of a core of the valve, mm
|
A5D
|
A3E
|
|
Inlet valve
|
The nominal
|
5,465–5,480
|
6,455–6,470
|
|
The minimum
|
5,425
|
6,415
|
|
Final valve
|
The nominal
|
5,430–5,450
|
6,450–6,465
|
|
The minimum
|
5,390
|
6,410
|
|
|
|
5. By Nutromer in several places measure internal diameter of directing plugs of valves. Internal diameter of directing plugs:
A5D engine: 5,500–5,515 mm
A3E engine: 6,500–6,515 mm
|
|
6. Calculate a gap between the directing plug and a valve core. For this purpose subtract external diameter of a core of the valve from internal diameter of the corresponding directing plug of the valve. Gap:
A5D engine:
Inlet valve: 0,020–0,050 mm
Final valve: 0,050–0,085 mm
A3E engine:
Inlet valve: 0,030–0,060 mm
Final valve: 0,035–0,065 mm
|
| 7. If the gap exceeds maximum permissible value, replace the valve and / or directing plug of the valve. |
|
|
| 8. Measure height of a vystupaniye of each plug of the valve. If necessary replace directing plug of the valve. Height of a vystupaniye of the plug of the valve:
A5D engine:
Inlet valve: 12,8–13,4 mm
Final valve: 12,8–13,4 mm
A3E engine:
Inlet valve: 10,2–10,8 mm
Final valve: 10,2–10,8 mm
|
Prevention
Directing plugs of inlet and final valves are various.
|
|