TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-67
Lubricating Oil Consumption Excessive
This is symptom tree T102.
Cause
Correction
Inspect the engine and its components for
External engine leak
.......
seal, gasket, tappet cover, oil cooler, or drain
cock leaks.
OK
C
rankcase oil level above specification
Verify that the dipstick is correctly marked.
.......
(dipstick calibration not correct)
Refer to Procedure 007-009.
OK
L
Change the oil and filters. Refer to Procedure
007013 or 007-025. Use the oil type recom-
ubricating oil does not meet specifications for
.......
mended in Section V of the engine operation
operating conditions
and maintenance manual.
OK
T
Inspect the air crossover tube for evidence of
urbocharger leaking lubricating oil to the air
lubricating oil transfer. Refer to Procedure
.......
intake or exhaust
010-019 .
OK
A
ir compressor is pumping lubricating oil into
Check the air lines for carbon buildup and
.......
the air system
lubricating oil. Refer to Procedure 012-003.
OK
P
Perform a compression check and correct as
iston rings not sealing (blue smoke)
.......
required. Refer to Procedure 014-008.
OK
V
Check and adjust the valves. Refer to Proce-
alves are not sealing correctly
.......
dure 003-004.
L-651
