Tolerancias Culata

7/25/2019 Tolerancias Culata

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Task Descriptions 65

3.1.8 Cylinder head Tolerances

Cylinder head tolerances for heads with valve seat inserts and

exhaust emission certificationInlet and exhaust valve guides

Deviation Clearance Interference Wear limitNo. Designation Repairsize

Tol. size

Basicsize

lower upper min. max. min. max.

0 19.000 H7

1 19.100 H7

Cylinder headbore

2 19.300 H7

0 +0.021

0 19.000 r6

1 19.100r6

1

Valve guideexternaldiameter

2 19.300 r6

+0.028 +0.041

+0.007 +0.041

Valve guide bore

installed

11.000 H7 0 +0.0182

Valve stemdiameter

10.935 0.010 +0.010

0.055 0.093

MS20001/00E 07-02 MTU


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66 Task Descriptions


Tol. size

Basicsize


Ready-to-usevalve guide bore

installed

11.000 H9 0 +0.0432

Valve stemdiameter

10.935 0.010 +0.010

0.055 0.118

Valve clearance


Tol. size

Basicsize


1 Valve protrusion

exhaust valve

with valve seatinsert

+0.100 up to max.1.000

2 Valve clearanceor protrusion

inlet valve

0.000 up to max.1.100

MS20001/00E 07-02 MTU


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Inlet and exhaust valve seat insert


Tol. size

Basic

size lower upper min. max. min. max.

1 Valve-seat insertbore, exhaust

57.000 H6 0 +0.019

2 Valve-seat insert- depth

11.200 0.050 +0.050

3 Valve-seat insertbore, inlet

58.000 H6 0 +0.019

Reconditioning note:

If a valve-seat insert is replaced before reaching the reconditioning depth of 1.100 mm, it must be machinedto the depth of the contour to avoid that the valve-seat insert protrudes into the combustion chamber.

Max. corrective machining or equalizing of valve-seat inserts by 0.300 mm in depth, without machining thecontour and the radius.

MS20001/00E 07-02 MTU


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Inlet and exhaust valve-seat insert


Tol. size

Basic


1 Plug gaugediameter

73.200 0 0

2 Plug gaugediameter

87.130 0 0

3 Valve seatsurface

referencedimension

plug gauge

4.800 0.200 +0.200 up to min.3.700

4 Cylinder headdepth

Combustionchamber sealingring surface

13.800 0 +0.100

MS20001/00E 07-02 MTU


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Inlet valve elliptical chamfer


Tol. size

Basicsize lower upper min. max. min. max.

1 Distance to valveseat center

2.700 0.150 +0.150

2 Chamfer 0.300

MS20001/00E 07-02 MTU


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Exhaust valve


Tol. size

Basic


1 Valve head

externaldiameter

56.000 0.200 +0.200

Referencedimension

with ring gaugefor

valve seatdiameter

54.0002

Valve seat height 4.680

0.200 +0.100 up to min.3.480

3 Referencedimension

without ringgauge for

valve seat height

3.200 0.200 +0.100 up to min.3.000

MS20001/00E 07-02 MTU


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Inlet valve


Tol. size

Basic


1 Valve head

externaldiameter

57.000 0.200 +0.200

Referencedimension

with ring gaugefor

valve seatdiameter

54.0002

Valve seat height 4.050

0.200 +0.100 up to min.3.350

3 Referencedimension

without ringgauge for

valve seat height

3.200 0.200 +0.100 up to min.3.000

MS20001/00E 07-02 MTU


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Valve springs, outer


Tol. size


1 Spring length

released

83.900

Spring length

compressed

66.0002

Spring lengthwhen mod. valverotator is used

65.100

2.1 Spring force

at compressedspring length

530.000 N

Spring length

compressed

51.7503


50.850

3.1 Spring force atspring lengthpos. 3

952.000 N 39 N +39 N Springforce

min. 897.000 N

4 Spring length

block dimension

47.700 Blockdimension

max. 47.700

MS20001/00E 07-02 MTU


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Tol. size

Basicsize


5 Winding dia. 34.400

6 Wire dia. 5.300

e1 Permissible deviation of surface line from vertical with unloaded spring max. 2.500

e2 Spring seat, permissible parallelism deviation max. 0.600

Valve springs, inner


Tol. size

Basic

size lower upper

min. max.

min. max.

1 Spring length

released

78.400

Spring length

compressed

61.0002


60.100

2.1 Spring forceat compressedspring length

256.000 N

MS20001/00E 07-02 MTU


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Tol. size

Basicsize


Spring length

compressed

46.7503


45.850

3.1 Spring force atspring lengthpos. 3

466.000 N 19 N +19 N Springforce

min. 420.000 N

4 Spring length

Block dimension

42.500 Blockdimension

max. 42.500

5 Winding dia. 23.000

6 Wire dia. 3.600

e1 Permissible deviation of surface line from vertical with unloaded spring max. 2.300

e2 Spring seat, permissible parallelism deviation max. 0.400

MS20001/00E 07-02 MTU


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Cylinder head mating surface protective sleeve


Tol. size


1 Cylinder headheight

184.000 0.100 +0.100 183.600

2 Protective sleevemating surface

124.000 0 +0.200

Protective sleevebore

44.200 0 +0.1003

Protective sleeve

external

diameter

44.100 0.100 0

0.100 0.300

4 Cylinder headand protectivesleeve thread

M 24 x 1.5

Reconditioning note: Rework only until a satisfactory mating surface has been achieved. When reconditioning cylinder head height, reestablish the fire side contour of 13.800 +0.100.

MS20001/00E 07-02 MTU


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Cylinder head screws


Tol. size


1 Cylinder headscrew withengine lifting eye

333.000 0.300 +0.300

2 Cylinder headscrew

283.000 0.300 +0.300

MS20001/00E 07-02 MTU

Tolerancias Culata

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