Mitsubishi S12A2 - Page 340

INSPECTION RECORD SHEET
No.4(1/2)
Remark
Inlet
a
b
Exhaust
a
b
Reface up to
2.0 [0.079]
Approved by Checked by Measured by
5
Exhaust
a
b
6
Exhaust
3
Inlet
Exhaust
2
Inlet Inlet
a
b
b
Exhaust
a
b
a
b
a
b
Inlet
a
b
b
4
a
b
a
Exhaust
a
b
1
Inlet
a
Seat width
Item
No.
Directio
n
Valve seat
angle
Valve
sinkage
Seat width
No.
Directio
n
Valve seat
angle
Valve
sinkage
2.8 to 3.2
[0.110 to 0.126]
Item
Measured value
Valve
margin
Inlet
Exhaust
2.7 to 3.1
[0.106 to 0.122]
Measuring location
Item
Cylinder head valve sinkage, seat width, and valve margin -
measure(1/2)
Unit
Standard
mm[in.]
S
A
DateCustomer
Engine Model
Serial No.
-
0.5
[0.020]
Seat
width
Inlet
2.5
[0.098]
Exhaust
2.3
[0.091]
Item to be measured Limit
Valve
seat
Valve seat angle
1.75 to 1.95
[0.0689 to 0.0768]
1.98 to 2.18
[0.0780 to 0.0858]
Standard
Valve sinkage
30°
-0.1 to 0.1
[-0.039 to 0.039]