TM 5-3895-346-14
ENGINE OVERHAUL
CYLINDER LINER
upper end of the puller rod with the puller weight, thus releasing the liner.
c. Remove the tool from the liner. Then remove the liner from the cylinder block.
d. Remove and discard the cylinder liner seal ring from the groove in the cylinder block bore.
If tool J 22490 is unavailable, tap the liner out with a hardwood block and hammer.
Inspect Cylinder Liner
When the cylinder liner is removed from the cylinder block, it must be thoroughly cleaned and then checked for
the following:
1.
Cracks
2.
Scoring
3.
Poor contact on outer surface
4.
Flange irregularities
5.
Inside diameter
6.
Outside diameter
7.
Out-of-round
8.
Taper
A cracked or excessively scored liner must be
discarded. A slightly scored liner may be cleaned up
and reused.
Figure 2. Removing Cylinder Liner
with Tool J 22490
Excessive liner-to-block clearance or block bore distortion will reduce heat transfer from the liner to the block
and to the engine coolant.
Examine the outside diameter of the liner for fretting below the ports. Fretting is the result of a slight
movement of the liner in the block bore during engine operation, which causes material from the block to
adhere to the liner. These metal particles may be removed from the surface of the liner with a coarse, flat
stone.
Measure the block bore (Cylinder Block) and the outside diameter of the liner (refer to Specifications).
A used cylinder liner must be honed for the following reasons:
NOTE
Do not modify the surface finish in a new service cylinder liner. Since the liner is
properly finished at the factory, any change will adversely affect seating of the
piston rings.
1.
To break the glaze (Fig. 3) due to the rubbing action of the piston rings after long periods of
operation. (Unless this glaze is removed, the time required to seat new piston rings will be
lengthened.)
2.
To remove the ridge (Fig. 4) formed at the top by the piston ring travel. (Otherwise, interference
with the travel of the new compression rings may result in ring breakage.)
Therefore, even though the taper and out-of-round are within the specified
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