TM 9-2815-202-34
4-36. CYLINDER BLOCK MAINTENANCE (Cont)
b. Cleaning
NOTE
Remove all pipe plugs except fourteen plugs in cylinder head bolt holes. Do not
remove solid plugs.
(1) Scrape all gasket material from cylinder block.
WARNING
Dry cleaning solvent P-D-680 is toxic and flammable. Wear protective
goggles and gloves and use only in a well ventilated area. Avoid contact
with skin, eyes, and clothes and don’t breathe vapors. Do not use near
open frame or excessive heat. The flash point is 100oF-138°F (38o-50oC).
If you become dizzy while using cleaning solvent, get fresh air
immediately and get medical aid. f contact with eyes is made, wash your
eyes with water and get medical aid immediately.
(2) Clean inner and outer surfaces of cylinder block with cleaning solvent.
WARNiNG
Compressed air used for cleaning purposes will not exceed 30 psi. Use
only with effective chip guarding and personal protective equipment
(goggles/shield, gloves, etc).
(3) Clean water, air, and oil passages with bore brush. Wash passages by flushing with
cleaning solvent and blow out with compressed air.
(4) Dry cylinder block with compressed air.
c. Inspection
NOTE
After cylinder block is thoroughly cleaned and pressure tested (step e), cylinder bores
must be honed before inspection.
(1) Hone cylinder block bores as follows:
NOTE
Use a hone in which cutting radius of stones can be set in a fixed position to remove
irregularities in bore. Do not use spring-loaded hone. Clean stones frequently with wire
brush to prevent stone loading. Follow hone manufacturer’s instructions regarding use
of oil or kerosene on stones. Do not use such cutting agents with dry hone. Use 120-
grit stones.
4-166
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