ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
FIGURE 3-141. Removing Carbon From Cylinder Liner
h.
Before removing pistons, visually inspect condition of cylinder liners with pistons at bottom dead center (BDC).
Liners will require replacement if:
(1)
The crosshatch honing pattern is not visible immediately below the top ring turn around area.
(2)
Liners are pitted or contain deep vertical scratches that can be detected by the fingernail.
(3)
No further inspection is required if any one of the above conditions are found.
i.
Remove oil pan, refer to paragraph 3-20.1.
j.
Remove oil pump and outlet tube, refer to paragraph 3-21.1.
k.
Check rod bearing to journal oil clearance, refer to paragraph 3-46.2., step a.
CAUTION
Using pneumatic wrenches can cause thread damage.
CAUTION
Keep bearing inserts (3, FIGURE 3-143) with their respective rods (4) and caps (2). Mark rods (4),
pistons (7), and caps (2) to ensure correct assembly in same location.
I.
Remove bolt (1) securing bearing cap (2) to connecting rod (4); remove cap (2) and bearing inserts (3).
m.
Repeat step 1 for remaining pistons.
CAUTION
If cylinder liners (9) are to be reused, be extremely careful not to let connecting rod (4) hit liner bore
when removing piston/rod assembly to prevent damage to liner bore.
n.
Gently tap piston (7)
through top engine block from the bottom.
3-191
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