SECTION 5
TROUBLESHOOTING
T R O U B L E ANALYSIS FOR DETROIT DIESEL ENGINE (CONT.).
TABLE 5-1
CORRECTIVE ACTION
PROBABLE CAUSE
TROUBLE
Remove the air inlet housing and
High Lubrication
Blower oil seal leaking.
Oil Consumption
inspect the blower end plates while
(Cont.)
engine is running. If oil is seen on
the end plate radiating away from
the seal, overhaul the blower.
Inspect the engine coolant for lub-
Oil cooler core leaking.
ricating oil contamination; if con-
taminated, replace the oil cooler
core. Then, use a good grade of
cooling system cleaner to remove
oil from the cooling system.
Replace oil control rings on the
Oil control rings worn, broken or
piston.
improperly installed.
Replace the piston pin retainer and
Piston pin retainer loose.
defective ports.
Remove and replace defective parts.
Scored liners pistons or oil rings.
Replace worn and defective parts.
Excessive piston and rod misalign-
ment (worn crank shaft thrust washers)
Fill crankcase to proper level only.
Excessive oil in crankcase.
Check the compression pressure
Cylinder head gasket leaking.
Excessive Crankcase
and, if only one cylinder has low
Pressure
compression, remove the cylinder
head and replace the head gaskets.
Inspect the piston and liner and
Piston or liner damaged.
replace damaged parts.
Install new piston rings.
Piston rings worn or broken.
Clean, repair or replace the breather
Obstruction or damage to breather.
assembly.
Replace the gasket.
Damaged blower-to-block gasket.
Replace gasket.
Cylinder block end plate gasket
leaking.
Check the exhaust back pressure
Excessive muffler resistance.
and repair or replace the muffler
if on obstruction is found.
Remove and clean oil strainer.
Strainer clogged.
Low oil pressure
Remove and clean oil cooler core.
Cooler clogged.
5-17.