TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-23
Coolant in the Lubricating Oil
This is symptom tree T025.
Cause
Correction
Check the lubricating oil cooler for coolant
Lubricating oil cooler is leaking
.......
leaks and cracks. Refer to Procedure 007-003.
OK
A
Inspect the air compressor cylinder head and
ir compressor cylinder head is cracked or
gasket. Refer to Procedure 012-019 and the
porous, or has a leaking gasket (nonmarine
.......
Master Repair Manual, Holset Air Compres-
engines only )
sors, Bulletin No. 3666121.
OK
A
Inspect and pressure-test the aftercooler for
ftercooler is leaking
.......
leaks. Refer to Procedure 010-001.
OK
C
Check the cylinder head gasket. Refer to
ylinder head gasket is leaking
.......
Procedure 002-021.
OK
C
Pressure-test the cylinder head. Refer to
ylinder head is cracked or porous
.......
Procedure 002-004.
OK
C
ylinder head core and expansion plugs
Check cylinder head. Refer to Procedure
.......
002-004.
leaking or misassembled
OK
C
Inspect the cylinder block. Refer to Procedure
ylinder block is cracked or porous
.......
001-026.
L-607