TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-19
Coolant Temperature Above Normal Gradual Overheat (Continued)
Cause
Correction
Keel cooler is malfunctioning (marine engines
Inspect the keel cooler for proper operation.
.......
only)
Refer to the vessel OEM service manual.
OK
F
Put the engine at top dead center. Check and
uel injection pump timing is not correct
.......
adjust the fuel timing. Refer to Procedure
005-037.
OK
F
Replace the fuel injection pump. Refer to
uel injection pump is malfunctioning
.......
Procedure 005-012 or 005-014.
OK
P
lugged cooling passages in the cylinder
Pressure test the cooling system. Refer to
.......
head, head gasket, or cylinder block
Procedure 008-020.
OK
C
Refer to the Application Engineering Bulletin
ooling system has insufficient capacity
.......
(AEB) 90.24 for cooling system specifications.
L-603
