Mitsubishi S12A2 User Manual

2-5
Chapter 2 SERVICE DATA
Cylinder
head
Distortion of bottom surface 0.03 [0.0012] or less 0.07 [0.0028]
Height (reference)
134.9 to 135.1
[5.3110 to 5.3189]
Cylinder
liner
Inside diameter ø150 [5.9]
150.000 to 150.040
[5.9055 to 5.9071]
150.140
[5.9110]
Roundness 0.02 [0.0008] or less
Cylindricity 0.02 [0.0008] or less
Flange protrusion
0.10 to 0.19
[0.0039 to 0.0075]
Flange thick-
ness
P/N:32607-03400
15.15 to 15.19
[0.5965 to 0.5980]
P/N:32507-62400
12.15 to 12.19
[0.4783 to 0.4799]
Top ridge height
0.16 to 0.24
[0.0063 to 0.0094]
Piston
Outside
diameter
P/N:
32517-91101("91101" stamp)
32617-00701("00701" stamp)
32517-91201("91201" stamp)
32617-00600("00600" stamp)
ø150 [5.9]
149.71 to 149.75
[5.8941 to 5.8957]
149.68
[5.8929]
At the height from lower
end of piston at 95.8 mm
[3.77 in.]
with right angles to the
piston pin.
In one
engine
Weight dif-
ference
P/N:
32517-91101("91101" stamp)
32617-00701("00701" stamp)
Within ±15 g [0.53 oz]
P/N:
32517-91201("91201" stamp)
32617-00600("00600" stamp)
Within 20 g [0.71 oz]
Piston pin bore inside diameter ø58 [2.28]
58.002 to 58.012
[2.2835 to 2.2839]
58.040
[2.2850]
Protrusion
0.229 to 0.839
[0.0090 to 0.0330]
Cylinder
head
gasket
Thickness when tightened
1.8
[0.0709]
1.77 to 1.83
[0.0697 to 0.0720]
Piston
cooling
nozzle
Valve opening pressure
0.26 to 0.32 MPa
{2.7 to 3.3 kgf/cm
2
}
[38 to 47 psi]
Piston and
cylinder
head
Top clearance
1.191 to 2.031
[0.0469 to 0.0800]
Piston
ring
End gap
No. 1 compression
0.6 to 0.8
[0.024 to 0.032]
2.0 [0.079]
No. 2 compression
0.5 to 0.7
[0.020 to 0.028]
2.0 [0.079]
Oil
0.5 to 0.7
[0.020 to 0.028]
2.0 [0.079]
Piston
pin
Outside diameter ø58 [2.28]
57.987 to 58.000
[2.2829 to 2.2835]
57.970
[2.2823]
Unit: mm [in.]
Item
Nominal
value
Standard value Limit value Remarks

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English