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 TM 55-1905-223-24-3
TABLE 2-2. TROUBLESHOOTING-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP
5.
Check for defective cylinder head, head gasket, cylinder block, or liner as follows:
a.
Drain the engine lubricating oil. Refer to TM 55-1905-223-10.
b.
Remove the lubricating oil pan (para. 3-21).
c.
Use 20 psi (140 kPa) air pressure to pressurize the engine cooling system.
NOTE
Apply the air pressure 15 minutes before inspecting the cylinder liner, the crevice seal, or
the cylinder block for coolant leaks.
d.
Inspect the inside and the outside diameters of the cylinder liners and also the area of the cylinder block
around the crevice seals and the push tube cavity for coolant leaks.
e.
If a leak is found, remove the pressure test equipment. Remove the cylinder head and gasket (para. 2-
43) and inspect for coolant leaks.
f.
Replace the cylinder head or gasket as required (para. 2-43).
g.
Remove and inspect the cylinder liner(s) for cracks, porosity, or crevice seal damage.
h.
Remove and inspect the cylinder block (2) for cracks or porosity in the crevice seal area. Refer to (para.
4-17) for cylinder liner removal/replacement.
i.
Install a new gasket and the lubricating oil pan (para. 3-21).
j.
Fill the engine with clean lubricating oil. Refer to LO 55-1905-223-12.
NOTE
Make sure the oil drain plug is tight.
k.
Operate the engine until it reaches a temperature of 180 (80 ), and check for coolant or lubricating oil
F
C
leaks.
4. Loss of engine coolant (external leakage).
WARNING
Before removing pressure cap, engine must be cooled to below 120 (50 ) to avoid burn injury.
F
C
2-27
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