Mitsubishi S12A2 - Page 341

No.4(2/2)
INSPECTION RECORD SHEET
S
A
Customer
Engine Model
Date
Serial No.
Item
Cylinder head valve sinkage, seat width, and valve margin -
measure(2/2)
Unit mm[in.]
StandardMeasuring location
No.
Directio
n
Valve seat
angle
Valve
sinkage
Measured value
Valve sinkage
Valve
margin
Item
Valve
sinkage
Seat width
Item
No.
Directio
n
Valve seat
angle
7
Inlet
a
Seat width
Inlet
Exhaust
a
b
10
a
b
a
b
a
b
b
a
b
a
b
11
Exhaust
9
Inlet
Exhaust
8
Inlet
Exhaust
Inlet
a
b
b
Exhaust
a
a
b
12
Inlet
a
b
Exhaust
a
b
Limit
-
0.5
[0.020]
Standard
30°
Approved by Checked by Measured by
Remark
Exhaust
2.8 to 3.2
[0.110 to 0.126]
2.7 to 3.1
[0.106 to 0.122]
Inlet
Exhaust
Inlet
Item to be measured
Reface up to
2.0 [0.079]
Valve
seat
1.75 to 1.95
[0.0689 to 0.0768]
2.5
[0.098]
2.3
[0.091]
1.98 to 2.18
[0.0780 to 0.0858]
Seat
width
Valve seat angle
-0.1 to 0.1
[-0.039 to 0.039]