db57d230

2.2.12. Valve

1 – final valve;
2 – saddle of the final valve;
3 – the directing valve plug;
4 – plate of a valve spring;
5 – maslootrazhatelny cap;
6 – valve spring;
7 – holder of a spring of the valve;
8 – crackers;
9 - crackers;
10 – holder of a spring of the valve;
11 – valve spring;
12 - maslootrazhatelny cap;
13 – plate of a valve spring;
14 – the directing valve plug;
15 – saddle of the inlet valve;
16 – inlet valve.

Removal

PERFORMANCE ORDER
1. Special adaptation 09221-29100 squeeze a spring of the valve and remove crackers from a valve core. Slowly release adaptation squeezing a spring and remove a valve spring, a plate springs and the valve from a head of the block of cylinders.

Prevention

For storage of valves prepare the numbered plastic bags or containers.


2. Passatizhami 09222-29000 remove a maslootrazhatelny cap.

Prevention

Do not reuse a maslootrazhatelny cap.



Check

Valve


PERFORMANCE ORDER
1. A wire brush clear the valve.
2. 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 uneven wear of an end face of a core of the valve.
If necessary, repair or replace the valve.

Edge thickness:
Inlet valve: 1,1 mm
Final valve: 1,3 mm
Maximum permissible thickness of an edge:
Inlet valve: 0,8 mm
Final valve: 1,0 mm


Valve spring

PERFORMANCE ORDER
1. Examine each spring of the valve on lack of cracks and damages.
2. Measure spring length in a free state. Establish a spring on a flat horizontal surface and measure a deviation of the top part of a spring from the vertical plane.

Spring length under loading of 21,6 kg: 35 mm
Spring length under loading of 45,1 kg: 25,2 mm
Maximum permissible deviation of a spring from the vertical plane: no more than 1,5 °


The directing valve plugs


Check a gap between a core and a guide of the valve. If the gap exceeds maximum permissible value, replace the directing valve plug with the plug of the increased repair size.

Gap between a core and the directing valve plug:
Inlet valve: 0,03–0,06 mm
Final valve: 0,035–0,065 mm
Maximum permissible gap between a core and the directing valve plug:
Inlet valve: 0,1 mm
Final valve: 0,15 mm


The increased sizes of the directing valve plug

Increase in the size, mm
Dimensional tag
Diameter of an opening in a head of cylinders, mm
0,05
5
11,05–11,068
0,25
25
11,25–11,268
0,35
50
11,50–11,518

Valve saddle

Check a state and width of a working edge of a saddle of the valve. If necessary repair or replace a valve saddle.

Before replacement or repair of a saddle of the valve check wear of the directing valve plug. If the directing plug of the valve is worn-out, replace it.

Repairs of a saddle of the valve need to be made an emery circle or a mill. Width of a working facet of a saddle of the valve has to be within technical requirements.

Installation

Prevention

Before installation clear all details.
Apply a thin film of engine oil on all surfaces of sliding.


PERFORMANCE ORDER
1. Using special adaptation 09222-22001, establish a maslootrazhatelny cap.
2. Oil a valve core engine and install the valve. At installation of the valve do not make great efforts not to damage a maslootrazhatelny cap.
3. Establish springs and holders of springs. Springs need to be established by the party enameled to holders of springs.
4. Special adaptation squeeze a spring. Establish crackers and remove the special device for compression of a spring.
5. Establish a head of cylinders.