Daewoo DE12 - 6.2. Maintenance Specification Table

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Assembly Part Check items
Nominal Standard value Limit for
Correction Remarks
value for assembly use
Inside diameter of cyl. liner for wear 123 123~123.025 123.22 Replace liner
Cylinder
Projected portion of liner 0.03~0.08 5
block
The upper surface of cylinder block for distortion
0.05 Correct with a surface grinder Per distortion length for 200mm
Engine Hydraulic test for 1 minute (kg/cm
2
) 4 Replace if leaky
body
Valve seat depression
Intake -0.3~0
In case of new valve and valve seat
Cylinder
Cylinder head
Exhaust -0.3~0 -0.55
head
Height 114.9~115 -0.55 Replace cyl. head
Hydraulic test for 1 minute (kg/cm
2
) 4 113.9 Replace if leaky Water temp : 70C
Piston diameter(18mm from the lower side) 122.433~122.863
Clearance between piston and liner 0.123~0.162
Piston Tor ring 3.5
Width of piston ring
2nd ring 3.060~3.080
Replace piston if groove width
grooves
Oil ring 4.040~4.060
is beyond specified value
Major Piston projection from cylinder block upper surface 0~0.12
moving Top ring 0.30~0.45 1.5
parts Piston ring gap 2nd ring 0.35~0.50 1.5 Standard gauge inside
Oil ring
0.30~0.50 1.5 diameter : N123
*0.4~0.7
Piston Permissible weight difference of each piston 96g
ring Top ring
2nd ring 0.07~0.102 0.15 Replace ring or piston
Limit for use if for
Oil ring 0.05~0.085 0.15
standard clearance
Direction of ring gap Install ring by 120°
6.2. Maintenance specification table
Measure unworn portion beneath
the rim of the upper side
Measure unworn portion beneath
the rim of the upper side
*Adapted only in DE12TIS