Engine Overheating; Engine Overcooling; Lack Of Coolant; Cooling System Noisy - Daewoo DE12T Manual

6.2.5. Diagnostics and troubleshooting
Complaints

1. Engine overheating

2. Engine overcooling

3. Lack of coolant

4. Cooling system noisy

MAINTENANCE OF MAJOR COMPONENTS
Possible causes
•
Lack of coolant
•
Radiator cap pressure valve
spring weakened
•
Fan belt loosened or broken
•
Fan belt fouled with oil
•
Thermostat inoperative
•
Water pump defective
•
Restrictions in water passages
due to deposit of scales
•
Injection timing incorrect
•
Restriction in radiator core
•
Gases leaking into water jacket
due to broken cylinder head
gasket
•
Thermostat inoperative
•
Ambient temperature too low
•
Radiator leaky
•
Radiator hoses loosely
connected or damaged
•
Radiator cap valve spring
weakened
•
Water pump leaky
•
Heater hoses loosely
connected or broken
•
Cylinder head gasket leaky
•
Cylinder head or cylinder block
cracked
•
Water pump bearing defective
•
Fan loosely fitted or bent
•
Fan out of balance
•
Fan belt defective
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Corrections
•
Replenish coolant
•
Replace cap
•
Adjust or replace fan belt
•
Replace fan belt
•
Replace thermostat
•
Repair or replace
•
Clean radiator and water
passages
•
Adjust injection timing
correctly
•
Clean exterior of radiator
•
Replace cylinder head gasket
•
Replace thermostat
•
Install radiator curtain
•
Correct or replace
•
Retighten clamps or replace
hoses
•
Replace cap
•
Repair or replace
•
Tighten or replace hoses
•
Replace cylinder head gasket
•
Replace cylinder head or block
•
Replace bearing
•
Retighten or replace fan
•
Replace fan
•
Replace fan belt