Mitsubishi 4g1 User Manual

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Item

Standard

Limit

Camshaft cam

SOHC 12-VALVE

Intake (primary)

38.78

38.28

height mm

Intake (secondary)

38.78

38.28

Exhaust

39.10

38.60

SOHC 16-VALVE

Intake

36.99

36.49

Exhaust

36.85

36.35

DOHC

Intake

34.67

38.28

Exhaust

34.26

38.60

Camshaft journal diameter mm

SOHC

45.93- 45.94

-

DOHC

25.95- 25.97

-

Flatness of cylinder head gasket surface mm

0.05 or less

-

Cylinder head gasket surface grinding limit (including grinding of

cylinder block gasket surface) mm

-

0.2

Cylinder head overall height mm

SOHC 12-VALVE

106.9- 107.1

-

SOHC 16-VALVE

119.9- 120.1

-

DOHC

131.9- 132.1

-

Cylinder head bolt nominal length mm

-

103.2

Valve margin mm

Intake

1.0

0.5

Exhaust

1.5

1.0

Valve stem diameter mm

SOHC 12-VALVE

6.6

-

SOHC 16-VALVE

5.5

-

DOHC

5.5

-

Valve stem-to-guide SOHC 12-VALVE

Intake

0.020- 0.050

0.10

clearance mm

Exhaust

0.050- 0.085

0.15

SOHC 16-VALVE

Intake

0.020 - 0.047

0.10

Exhaust

0.030 - 0.062

0.15

DOHC

Intake

0.020- 0.047

0.10

Exhaust

0.030- 0.062

0.15

Valve face angle

45_- 45.5_

-

Valve stem projec- SOHC 12-VALVE

Intake

43.70

44.20

tion mm

Exhaust

43.30

43.80

SOHC 16-VALVE

Intake

53.21

53.71

Exhaust

54.10

54.60

DOHC

Intake

48.80

49.30

Exhaust

48.70

49.20

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