Daewoo DE12T - Crank Shaft End Play; Piston

4) Crank shaft end play
•
Assemble the crankshaft to the cylin-
der block.
•
With a dial gauge, measure crank-
shaft end play.
3.2. 8. Piston
1) Visual check
•
Visually check the pistons for cracks, scuff or wear, paying particular attention to the ring
groove.
2) Clearance between the piston and cylinder liner
•
With an outside micrometer, measure
the piston outside diameter at a point
18mm away from the lower end of pis-
ton skirt in a direction at a right angle
to the piston pin hole.
•
Using a cylinder bore gauge, measure
cylinder liner inside diameter at 3
points (cylinder top ring contacting
face, middle, and oil ring contacting
face on BDC) in a direction at an angle
of 45˚ Take the mean value with the
largest and smallest values excepted.
•
The clearance is computed by subtracting the piston outside diameter from the cylinder liner
inside diameter. Replace either piston or cylinder liner, whichever damaged more, if the
clearance is beyond the specified limit.
Clearance between piston and liner
- 72 -
INSPECTION AND MEASUREMENT
Standard Limit
0.15 ~ 0.325
mm 0.5 mm
EAMD066I
외경 측정위치
18mm
2
EAMD067I
Position of measuring
outside diameter
Standard N 122.873 ~ N 122.877 mm
Standard Limit
N 123 ~ N 123.023 mm N 123.223 mm
Standard 0.113 ~ 0.152 mm