SECTION 5
TROUBLESHOOTING
TROUBLE ANALYSIS FOR DETROIT DIESEL ENGINE (CONT.).
TABLE 5-1
CORRECTIVE ACTION
PROBABLE CAUSE
TROUBLE
Remove by-pass valve and clean
Low
Oil
Pres-
Cooler by-pass valve not func-
the valve and valve seat and in-
sure (Cont.)
tioning properly.
spect. Replace defective parts.
Remove the pressure regulator
Pressure regulator valve not
valve and clean the valve seat
functioning
properly.
and inspect. Replace defective
parts.
Change bearings.
Excessive wear on crankshaft
Replace missing plugs.
Gallery, crank shaft or camshaft
p l u g s missing.
Check oil pressure with a reliable
Faulty gouge.
gouge. Replace gauge if faulty.
Remove and clean the oil pan and
Oil pump intake screen partially
oil intake screen. Change oil
clogged.
filter and replace oil.
Remove and inspect the valve,
Oil pump relief valve faulty.
valve bore and spring; replace
faulty parts.
Disassemble piping and install
Air leak in oil pump section.
new gaskets.
Remove the pump, clean and re-
Oil pump worn or damaged.
place defective parts.
Fill cooling system. Check for
Engine Overheating
Lock of coolant.
leaks. Tighten clomps.
Replace all faulty hoses.
Collapsed or disintegrated hoses.
Test thermostot and replace if
Thermostat stuck shut.
faulty.
Repair or replace pump.
W ater pump defective.
Check exhaust manifold.
Exhaust system partially blocked.
Replace if hard, crocked or frayed.
Fan belt too loose or slipping.
Check pulleys for cracks or mis-
alignment. Replace if necessary.
Check belt tension.
Clean radiator with water or com-
Radiator clogged (external).
pressed air.
Flush radiator
described in
Radiator
clogged
(internal).
OS
section 4.
5-18.
