D439E Service Manual 2. Engine Mechanical System (D439E)
75
2. Remove the piston pin snap ring (2) using the
snap ring pliers (1).
3. Remove the piston pin (1) from the piston.
4. Remove the connecting rod (1) from the piston.
Inspection
Cylinder Block
NOTE
a. Before repairing, clean each part to remove dust,
oil, carbon and fur.
b. Before cleaning the cylinder block, check water
leakage or damages.
c. Remove the adhesives at each oil hole using air
brush and check whether any hole is clogged.
1. In addition to the visual check about scratch, rust
and corrosion, inspect the slight scratches with
precipitant. Repair or replace it if needed.
2. Measure the twist of cylinder block using straight
edge (1) and thickness gauge (2). Measure them
by placing the straight edge as shown in the
following figure.
NOTE : When measuring, cylinder upper block
should be free from foreign materials such as gasket
piece.
CAUTION
When grinding the cylinder block, grind it as the
piston protrusion does not exceed the reference.
Flatness figure of cylinder block
Reference : Below 0.07 mm
Limit : 0.2 mm
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