2.1.2. Valves

Valves

Characteristic

Value

Eccentricity of cores of valves of rather working facet, no more, than a mm

0,03

Facet corner

45 ° + 15'

The minimum height of a head of the valve to a working facet of M 102, not less, than a mm

  • inlet

1,0

  • final

2,0


Characteristics of valves

Parameter, mm

Engine model
M 115.938
M 102.920, M 102.939
M 102.980, M 102.982
M 115.954
Width of a working facet of the valve
  • inlet

1,8 — 2,5

  • final

1,5 — 2,5

Nominal deepening of a head of the valve
  • inlet

0,5

1,7

1,2

0,1

  • final

1,6

1,6

0,5

1,6

Maximum admissible deepening of the valve
  • inlet

1,5

2,6

2,1

0,9

  • final

1,7

1,7

1,4

1,7

Diameter of a head of the valve
  • inlet

44,30 — 44,10

39,90 — 40,10

39,90 — 40,10

47,10 — 46,90

  • final

37,25

35,90 — 36,10

37,25

Valve head height
  • inlet

1,0

1,6

1,6

1,0

  • final

1,5

2,7

2,7

1,5

Diameter of a core of the valve
  • inlet

8,948 — 8,970

7,970 — 7,955

8,955 — 8,970

  • final

10,94 — 10,92

8,960 — 8,938

10,935 — 10,95

Valve core length
  • inlet

128,0

114,7 — 115,10

128

  • final

132,2

115,60 — 116,00

132,20

Parameter, mm
M 123.920, M 123.921
M 110.923
M 110.984, M 110.988
 
Width of a working facet of the valve
  • inlet

1,8 — 2,5

  • final

1,5 — 2,5

1,5 — 2,0

 
Nominal deepening of a head of the valve
  • inlet

0,5

3,3

3,3

  • final

1,5

0,6

0,6

Maximum admissible deepening of the valve
  • inlet

1,5

4,2

4,2

  • final

1,6

1,5

1,5

Diameter of a head of the valve
  • inlet

41,30 — 41,10

45,10 — 45,30

  • final

37,00 — 37,20

Valve head height
  • inlet

1,0

1,0

1,0

  • final

2,0

Diameter of a core of the valve
  • inlet

8,955 — 8,970

  • final

10,935 — 10,95

10,94 — 10,96

Valve core length
  • inlet

128

115,0

  • final

132,20

118,00


Valvate springs

Inlet and final valves have on one identical spring of models M 102 and M 123 and two springs of models M 110 and M 115. Valvate springs of engines with adjustable gaps in the mechanism of the drive of valves differ from springs of valves of engines with hydraulic compensation of a gap. At assembly direct a color tag to a plate of a valve spring.


Characteristics of valvate springs

Color marking *
Engine model
M 115.938
M 102.920, M 102.939
M 102.980, M 102.982
M 115.954

Territory.

— B/F — B

— К/Ф — the Territory.

Territory.

M 123.920, M 123.921
M 110.923
M 110.984, M 110.988

— the Territory.

* The territory — red; Ф — B — violet-white; — To — yellowy-brown; Ф — the Territory — violet-red; — B — ochroleucous.

Diameter of a spring

Parameter, mm

Engine model
M 115.938
M 102.920, M 102.939
M 102.980, M 102.982
M 115.954
Diameter of a spring
  • external

33,2 — 33,7

33,9

34,2

33,1 — 33,4

  • internal

22,2

22,29

Diameter of a wire of a spring
  • external

4,3

4,6

4,75

4,25

  • internal

2,5

2,5

Diameter of a spring in a free state
  • external

50,0

48,5

49,0

50,0

  • internal

45,0

45,0

Length and loading of an external spring

length, mm / under loading, kgf

30,0/66,7 — 76,3

30,4/79,0 — 85,0

30,5/84,3 — 90,2

30,0/66,7 — 76,3

rated load, kgf

60,9

71,0

76,0

Length and loading of an internal spring

length, mm / under loading, kgf

21,0/22,8 — 25,2

21,0/22,8 — 25,2

rated load, kgf

20,5

20,5

Catalog No. of a spring
  • external

1290530220

1290530320

  • internal

1080530022

1080530022

Parameter, mm
M 123.920, M 123.921
M 110.923
M 110.984, M 110.988
Diameter of a spring
  • external

34,1 — 34,5

33,8 — 34,1

  • internal

22,0 — 22,4

Diameter of a wire of a spring
  • external

4,75

4,6

4,6

  • internal

2,5

2,5

Diameter of a spring in a free state
  • external

49,0

49,5

  • internal

45,0

Length and loading of an external spring

length, mm / under loading, kgf

30,5/86,0 — 92,0

30,5/84,0 — 92,0

 

rated load, kgf

57,1

 
Length and loading of an internal spring

length, mm / under loading, kgf

21,5/22,8 — 25,2

 

rated load, kgf

20,5

Catalog No. of a spring
  • external

1230530020

1180530120

  • internal

1300530222


Yokes of the drive of valves

Yokes are made of steel and are identical to inlet and final valves. The basic surface of a yoke is subjected to superficial training. The gap between a yoke and a core of the valve is regulated by rotation of the adjusting screw with a lock-nut or compensated hydraulically. Oil comes to a hydraulic pusher under pressure from an axis and a rack of yokes.

Characteristic

Value

Internal diameter of an axis of a yoke, mm

18,016 — 18,027

Diameter of an axis of a yoke, mm

17,989 — 18,000

Radial gap between a yoke and an axis, mm

0,016 — 0,038

Diameter of an opening in a camshaft support for a rack of a yoke, mm

18,000 — 18,018


Hydraulic pushers

Characteristic

Value

Course of hydrocompensation, mm

0,5 — 2,4

Thickness of adjusting washers, mm

0,9; 1,5; 1,8; 2,2

Thickness of plates, mm

1,0; 1,5