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16. TROUBLESHOOTING
16.3.3 ENGINE
Problem
Engine oil pressure
warning
light re-
mains lit when engine speed is raised
after completion of warm up
Steam is emitted from top part of radia-
tor
Indicator of water temperature
gauge is
out of run range
Engine does not start when starting
motor is engaged
Exhaust smoke is white or
blue
Exhaust smoke occasionally turns black
Combustion
noise occasionally
makes
breathing sound
Abnormal noise generated (combustion
or mechanical)
Main Cause
+ Engine oil pan oil level is low
+ Clogged oil filter element
+ Defective warning light
Cooling water level low, water leak-
age
Loose fan belt
Dirt or scale accumulated
in cooling
system
Clogged radiator fins or damaged fins
Defective thermostat
Loose radiator filler cap (high altitude
operation
Defective water temperature
gauge
Lack of fuel
Air in fuel system
Defective fuel injection pump or noz-
zle
Starting
motor cranks engine slug-
gishly
Defective compression
0
Defective valve clearance
+ Too much oil in oil pan
+ Improper fuel
+ Clogged air cleaner element
+ Defective nozzle
+ Defective compression
+ Defective nozzle
+ Low grade fuel being used
+ Overheating
+ Damage inside muffler
+ Excessive valve clearance
Remedy
+
Add oil to specified
level, see 24.3
EVERY 10 HOURS SERVICE
+ Replace element, see 24.6 EVERY
250 HOURS SERVICE
+ (Replace light)
Add cooling water, see 24.3 EVERY
10 HOURS SERVICE
Adjust fan belt tension,
see 24.11
WHEN REQUIRED
Change cooling water, clean inside of
system,
see
24.9
EVERY
2000
HOURS SERVICE
Clean or repair, see 24.7 EVERY 500
HOURS SERVICE
(Replace thermostat)
Tighten cap or replace
(Replace water temperature
gauge)
Add
fuel,
see
24.3
EVERY
10
HOURS SERVICE
Repair place where is sucked in
(Replace pump or nozzle)
See 16.3.1 ELECTRICAL SYSTEM
0
(Adjust valve clearance)
+ Add oil to specified
level, see 24.3
EVERY 10 HOURS SERVICE
+ Change to specified fuel
+ Clean or replace, see 24.10 PERI-
ODIC
+ (Replace nozzle)
+ (Adjust valve clearance)
+ (Replace nozzle)
2-67
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