TM 5-2420-230-24-2
3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-35
Engine Noise Excessive (Continued)
Cause
Correction
Check the accessory drive axial end play.
Accessory drive is worn (axial end play is out
.......
Inspect the shaft for wear.Refer to Procedure
of specification)
009-019.
OK
C
Refer to the Coolant Temperature Above
oolant temperature is above specification
.......
Normal - Gradual Overheat symptom tree.
OK
D
Disconnect the drivetrain. Check for engine
rivetrain noise is excessive
.......
noise. Refer to the OEM service manual.
OK
E
ngine mounts are worn, damaged, or not
Check the engine mounts. Refer to the OEM
.......
correct
service manual and Procedure 016-003.
OK
O
Measure and adjust the overhead settings.
verhead adjustments are not correct
.......
Refer to Procedure 003-004.
OK
O
Inspect the rocker levers, rocker shafts, and
valves for damage or excessive wear. Refer to
verhead components are damaged
.......
Procedure 003-008.
OK
I
Perform the single-cylinder cutout test. Re-
njector is malfunctioning
.......
place the injectors as necessary. Refer to
Procedure 006-026 or 014-008.
OK
T
Refer to the Engine Noise Excessive - Turbo-
urbocharger noise
.......
charger symptom tree.
OK
C
Refer to the Engine Noise Excessive symptom
ombustion noise excessive
.......
tree.
OK
B
(Continued)
L-619
