POWER CYLINDERS 221
2. With the lifting bridge firmly on the crankcase top
deck, turn the forcing nut to break the cylinder
sleeve loose from the crankcase.
3. Lift sleeve and puller from the crankcase.
4. Use a pick to remove the crevice seal at the lower
counterbore area of each cylinder sleeve. Discard
crevice seal.
Cleaning
Pistons and Related Components
CAUTION: To prevent engine damage, do not use
a caustic solvent or wire brushes, or bead blasting
media to clean aluminum pistons.
1. Soak aluminum pistons and skirts in a soap and
water solution. Use a non-metallic brush to clean
the pistons.
2. Scrub the piston ring grooves thoroughly. Make
sure that the four oil drain holes in the oil ring
grooves are not blocked.
CAUTION: To prevent engine damage, do not clean
the fractured mating surfaces of the connecting rods.
3. Use a suitable solvent and a non-metallic brush
to clean the connecting rods and caps, piston
rings, pins, retainers, and steel piston crowns.
Thoroughly clean the connecting rod bolt holes
and threads.
4. Clean crevice seal bore area of any scale,
deposits, or sealant (located in crankcase.)
Inspection
Pistons
CAUTION: To prevent engine damage, when
replacing only the steel piston crown, the original
orientation of the reused aluminum piston skirt to the
sleeve must be maintained upon reassembly.
Inspect the pistons for scuffed or scored skirts
and worn ring lands. Replace damaged pistons
as required. For two-piece pistons, the aluminum
piston skirt or steel piston crown may be replaced
individually.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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