TM 5-3895-383-24
2.
Dirt in inlet air:
Inspect all gaskets and connections. Make repairs
if leaks are found.
3.
Fuel leakage into lubrication oil:
This will cause high fuel consumption and low
engine oil pressure. This condition may also
increase the oil level in the crankcase. Make
repairs if leaks are found. Install new parts were
needed.
4.
Incorrect lubrication oil:
Check
oil
recommendations
for
proper
oil
specifications for engine operating conditions.
5.
Incorrect engine settings:
Check timing, injector synchronization, fuel setting,
and valve settings. Refer to the Testing And
Adjusting Section of the Service Manual.
Problem 21: Coolant In Lubrication Oil
Probable Cause(s):
Failure Of The Oil Cooler Core
Failure Of Cylinder Head Gasket
Failure Of Seal Between Cylinder Head And
Sleeve In Injector Bore
Crack Or Defect In Cylinder Head
Crack Or Defect In Cylinder Block
1.
Failure of the oil cooler core:
Install a new core for the defective oil cooler. Drain
crankcase and refill with clean lubricant. Install new
oil filter.
2.
Failure of cylinder head gasket:
Remove the radiator cap and with the engine
running look for air bubbles in the coolant. Bubbles
in the coolant are a sign of probable leakage at the
head gasket. Remove the cylinder head from the
engine. Check the cylinder head, cylinder walls
and head gasket surface of the cylinder block for
cracks. When installing the head, use a new head
gasket. Tighten the bolt that hold the cylinder head
according to the Specifications Section of the
Service Manual.
3.
Failure of seal between cylinder head and sleeve in
injector bore.
Replace sleeve. Apply sealant per instruction in the
Specifications Section of the Service Manual.
4.
Crack or defect in cylinder head:
Install a new cylinder head.
5.
Crack or defect in cylinder block:
Install a new cylinder block.
Problem 22: Too Much Exhaust Smoke
(Black Or Gray):
Engine Runs Smoothly (Go to Step 1)
Probable Cause(s):
Engine Used At An Altitude Higher Than
762 m (2500 ft)
Not Enough Air For Combustion
Exhaust System Restriction
Low Quality Fuel
Fuel Setting Incorrect
Fuel Injection Timing Is Not Correct
Valve Adjustment Is Not Correct Or Valve
Leakage
Defective Fuel Injector
Governor Problem
Engine Runs Rough (Go to Step 10)
Misfiring Cylinders
Fuel Injection Timing Is Not Correct
Air In Fuel System
1.
Engine used at an altitude above 762 m (2500 ft):
Consult
with
the
Fuel
Setting
And
Related
Information
Fiche
specifications
for
proper
operating altitude for engine certifications.
2.
Not enough air for combustion:
a.
Restriction in air cleaner:
If the air cleaner has a restriction indicator, see if
the red piston is in view. If there is no restriction
indicator, restriction can be checked with a water
manometer or a vacuum gauge (which measures
in inches of water). Make a connection of the
piping between the air cleaner and the air inlet of
the turbocharger. Check with the engine running
at full load rpm. Maximum restriction is 635 mm
(25 in) of water. If a gauge is not available,
visually check the air cleaner element for dirt. If
the element is dirty, clean the element or install a
new element.
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