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Valves

Features valve

Option mm	Engine model
	M 115,938	M 102,920, 102,939 M	M 102,980, M 102.982	M 115,954
Width of a working facet of the valve
Intake	1.8-2.5
outlet	1.5-2.5
Rated deepening of the valve head
Intake	0.5	1.7	12	0.1
outlet	16	16	0.5	16
The maximum allowable valve recess
Intake	15	2.6	2.1	0.9
outlet	1.7	1.7	14	1.7
The diameter of the valve head
Intake	44,30-44,10	39,90-40,10	39,90-40,10	47,10-46,90
outlet	37.25	35,90-36,10		37.25
The height of the valve head
Intake	10	16	16	10
outlet	15	2.7	2.7	15
The diameter of the valve stem
Intake	8,948-8,970	7,970-7,955		8,955-8,970
outlet	10,94-10,92	8,960-8,938		10,935-10,95
The length of the valve stem
Intake	128.0	114,7-115,10		128
outlet	132.2	115,60-116,00		132.20
Option mm	M 123,920, 123,921 M	M 110,923	M 110,984, 110,988 M
Width of a working facet of the valve
Intake	1.8-2.5
outlet	1.5-2.5	1.5-2.0
Rated deepening of the valve head
Intake	0.5	3.3	3.3
outlet	15	0.6	0.6
The maximum allowable valve recess
Intake	15	4.2	4.2
outlet	16	15	15
The diameter of the valve head
Intake	41,30-41,10	45,10-45,30
outlet	37,00-37,20
The height of the valve head
Intake	10	10	10
outlet	20
The diameter of the valve stem
Intake	8,955-8,970
outlet	10,935-10,95	10,94-10,96
The length of the valve stem
Intake	128	115.0
outlet	132.20	118,00

Valve spring

Inlet and outlet valves have one same spring models M 102 and M 123 and two spring models M 110 and M 115. Valve spring motors with adjustable clearances in the valve mechanism of the valve springs are different from engines with hydraulic clearance compensation. When assembling the color label to send the valve spring plate.

Features valve springs

Colour coding *

Engine model
M 115,938	M 102,920, 102,939 M	M 102,980, M 102.982	M 115,954
Kr.	F-B / F & B	F-K / F-Kr.	Kr.
M 123,920, 123,921 M	M 110,923	M 110,984, 110,988 M
F-Kr.	-	-

* Kr. - Red; F-B - purple and white; F-K - yellow-brown; F-Kr. - Violet-red; F & B - yellow and white.

The diameter of the spring

Option mm	Engine model
	M 115,938	M 102,920, 102,939 M	M 102,980, M 102.982	M 115,954
The diameter of the spring
outdoor	33,2-33,7	33.9	34.2	33,1-33,4
internal	22.2	-	-	22.29
The diameter of the spring wire
outdoor	4.3	4.6	4.75	4.25
internal	2.5	-	-	2.5
The diameter of the spring in a free condition
outdoor	50.0	48.5	49.0	50.0
internal	45.0	-	-	45.0
The length of the outer spring load
length mm / under load, 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	-
The length and internal load spring
length mm / under load, kgf	21.0 / 22,8-25,2	-	-	21.0 / 22,8-25,2
rated load, kgf	20.5	-	-	20.5
Part number of the spring
outdoor	1290530220	-	-	1290530320
internal	1080530022	-	-	1080530022
Option mm	M 123,920, 123,921 M	M 110,923	M 110,984, 110,988 M
The diameter of the spring
outdoor	34,1-34,5	33,8-34,1
internal	-	22,0-22,4
The diameter of the spring wire
outdoor	4.75	4.6	4.6
internal	-	2.5	2.5
The diameter of the spring in a free condition
outdoor	49.0	49.5
internal	-	45.0
The length of the outer spring load
length mm / under load, kgf	30.5 / 86,0-92,0	30.5 / 84,0-92,0
rated load, kgf	57.1	-	-
The length and internal load spring
length mm / under load, kgf	-	21.5 / 22,8-25,2
rated load, kgf	-	20.5
Part number of the spring
outdoor	1230530020	1180530120
internal	-	1300530222

Rocker arm valve drive

Rocker made of steel and the same for the intake and exhaust valves. The bearing surface of the rocker surface subjected to quenching. The gap between the rocker and the valve stem is adjusted by turning the adjustment screw with a lock nut or hydraulically compensated. Hydraulic oil under pressure enters the pusher from the axis of the rack and the rocker arm.

Characteristic	Value
The inner diameter of the rocker axis, mm	18,016-18,027
The diameter of the rocker axis, mm	17,989-18,000
Radial clearance between the rocker arm and the axis, mm	0,016-0,038
The diameter of the holes in the bearing of the camshaft rocker rack, mm	18,000-18,018

Hydraulic tappets

Characteristic	Value
Progress gidrokompensatsii mm	0,5-2,4
Thickness of shims in mm	0.9; 15; 18; 2.2
The thickness of the plates, mm	10; 15