Mitsubishi 4G9 用户手册

Items

Limit

Standard value

Valve stem projec-
tion mm

SOHC

Intake

49.30

49.80

tion mm

Exhaust

49.35

49.85

DOHC

Intake

46.70

47.20

Exhaust

46.65

47.15

DOHC–MIVEC

Intake

58.13

58.63

Exhaust

57.85

58.35

DOHC–GDI

Intake

46.70

47.20

Exhaust

46.65

47.15

Cylinder head bolt shank length mm

–

96.4

Valve stem O.D. mm

6.0

–

Valve face angle

45

_

 – 45.5

_

–

Valve spring load/installed height N/mm

SOHC

216/44.2

–

DOHC

255/44.5

–

DOHC–MIVEC

255/44.5

–

DOHC–GDI

196/37.5

–

Valve guide I.D. mm

6.0

–

Oil pump tip clearance mm

0.06 – 0.18

–

Oil pump side clearance mm

0.04 – 0.10

–

Oil pump body clearance mm

0.10 – 0.18

0.35

Piston ring to piston ring groove clearance
mm

No. 1

0.03 – 0.07

0.1

mm

No. 2

0.02 – 0.06

0.1

Piston ring end gap
mm

No. 1

4G92, 4G93

0.25 – 0.40

0.8

mm

4G94

0.15 – 0.30

0.8

No. 2

0.40 – 0.55

0.8

Oil ring

SOHC (4G92, 4G93)

0.20 – 0.60

1.0

SOHC (4G94), 
DOHC

0.10 – 0.35

1.0

Crankshaft pin oil clearance mm

0.02 – 0.05

0.1

Piston pin press-in load N [Room temperature]

4,500 – 14,700

–

Connecting rod big end side clearance mm

0.10 – 0.25

0.4

Piston pin O.D. mm

19.0

–

Piston O.D. mm

4G92, 4G93

81.0

–

4G94

81.5

–

Crankshaft journal oil clearance mm

0.02 – 0.04

0.1

Cylinder block gasket surface flatness mm

0.05

0.1

Grinding limit of cylinder block gasket surface mm 
*Total resurfacing depth of both cylinder head and cylinder block

–

0.2*

E