Engines Iveco C87 / Cursor 87. Manual - part 41

8

SECTION 2 - G-DRIVE APPLICATION

CURSOR ENGINES G-DRIVE

Base - June 2007

F2C

Type

mm

X

Measuring dimension

X

125

Max. connecting rod
axis misalignment
tolerance

0.08

1

2

∅

∅

Main journals

∅1

- nominal
- class

1

- class

2

- class

3

Crankpins

∅2

- nominal
- class

1

- class

2

- class

3

92.970 to 93.000
92.970 to 92.980
92.980 to 92.990
92.990 to 93.000

81.915 to 81.945
81.915 to 81.925
81.925 to 81.935
81.935 to 81.945

S 1

S 2

Main bearing shells

S1

Red
Green
Yellow*

2.968 to 2.978
2.978 to 2.988
2.988 to 2.998

Big end bearing shells

S2

Red
Green
Yellow*

1.994 to 2.002
2.002 to 2.010
2.010 to 2.018

3

∅

Main bearing housings

∅3

- nominal
- class

1

- class

2

- class

3

99.000 to 99.030
99.000 to 99.009
99.010 to 99.019
99.020 to 99.030

Bearing shells -
main journals

0.050 to 0.090

Bearing shells -
big ends

0.040 to 0.080

Main bearing shells

0.127 - 2.254 - 0.508

Big end bearing shells

0.127 - 2.254 - 0.508

X1

Main journal,
thrust bearing

X1

39.96 to 40.04

X2

Main bearing housing,
thrust bearing

X2

38.94 to 38.99

X 3

Thrust washer
halves

X3

3.38 to 3.43

Crankshaft end float

0.10 to 0.30

1

2

Alignment

1 - 2

Ovalization

1 - 2

Taper

1 - 2

-

0.04

-

*

Fitted in production only and not supplied as spares

9

CURSOR ENGINES G-DRIVE

SECTION 2 - G-DRIVE APPLICATION

Base - June 2007

F2C

CYLINDER HEAD - VALVE TRAIN

mm

∅ 1

Valve guide housings
in cylinder head

∅1

12.9800 to 12.997

2

∅

Valve guide

∅2

8.023 to 8.038

∅ 3

Valve guide

∅2

∅3

8.023 to 8.038

13.012 to 13.025

Valve guides - housings
in the cylinder heads

0.015 to 0.045

Valve guide

0.2 - 0.4

∅ 4

Valves:

∅4

7 970 to 7 985

∅4

α

∅4

7.970 to 7.985

60

° 30′ ± 7′ 30″

7 970

7 985

α

∅4

α

7.970 to 7.985

45

°

+15

-0

+15’

-0’

Valve stem and its guide

0.040 to 0.070

Valve seat in
head

head

∅1

41.985 to 42.020

∅ 1

∅1

41.985 to 42.020

40.985 to 41.020

2

∅

Outside diameter of valve
seat; angle of valve seat

2

∅

seat; angle of valve seat
in cylinder head:

0’

0 5’

∅2

α

42.060 to 42.075

60

° 30′

0

-0,5’

α

α

∅2

60

° - 30′

41 060 t 41 075

0’

-0,5’

α

∅2

α

41.060 to 41.075

45

° - 30’

X

Recessing of valve

0.5 to 0.8

X

Recessing of valve

X

1.6 to 1.9

Between valve

Between valve
seat and head

0.040 to 0.090

10

SECTION 2 - G-DRIVE APPLICATION

CURSOR ENGINES G-DRIVE

Base - June 2007

Type

F2C

Type

mm

Valve spring height:

A

B

free height

H

70.77

-

H

under a load of:

H

H 1

H 2

N 460

± 23

H1A

N 460

22

H1B

{

51

H 2 N 460

± 22

H1B

{

51

N 740

± 33

H2A

N 731 4

42

H2B

{

39

N 731,4

± 42

H2B

{

39

X

Injector protrusion

X

1.2 to 1.5

∅

∅

∅

Camshaft bushing housing
in the cylinder head:
1

⇒ 7

Ø

69.000 to 69.030

∅

∅

∅

1

2

3

Camshaft bearing
journals:
1

⇒ 7

Ø

64.924 to 64.080

∅

Outer diameter of
camshaft bushings:

∅

69.090 to 69.130

∅

Inner diameter of
camshaft bushings:

∅

65.080 to 65.116

Bushings and housings
in the cylinder head

0.060 to 0.130

Bushings and bearing
journals

0.100 to 0.192

Cam lift:

H

7.4034

8.2108

∅ 1

Rocker shaft

∅1

31.964 to 31.980

11

CURSOR ENGINES G-DRIVE

SECTION 2 - G-DRIVE APPLICATION

Base - June 2007

F2C

Type

mm

Bushing housing in
rocker arms

32.025 to 32.041

∅

32.025 to 32.041

Between bushings and
housings

0.045 to 0.077

0.045 to 0.077

TURBOCHARGER

Type

HX55

0.025 to 0.127

End float

0.025 to 0.127

0.025 to 0.127

0 406 t 0 127

Radial play

0.406 to 0.127

0.330 to 0.508