61 

 

Fill   

Water overheat 

Insufficient coolant 

Water temperature gauge and sensor fails 

Thermostat can not open normally 

Water leakage in water 
tank 

Water pump trouble 

Water leakage in water pipe 

Water leakage in water tank of fan 
heater 

Radiator cooling fan can not run normally 

Cylinder head gasket damaged 

Replace   

Replace   

Replace   

Check 

Replace   

Overhaul and replace it 

Replace it 

Replace it 

Poor heat radiating of the radiator 

Check and replace   

Partial clogging in engine’s 
internal circulating water pipe 

Check and replace   

Insufficient 

Failure 

Abnormal 

Water leaking 

Abnormal 

Water leaking 

Water leaking 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

 
 

 

 

62 

 

No.035 Oil existing in the water tank   

Malfunction Cause 

Solution 

Man-made malfunction   

Oil enters cooling system during engine repair, and 
oil enters water tank along with coolant after the 
engine operates to normal water temperature. This 
malfunction can be eliminated through replacing 
coolant for several times; 

Malfunction of cylinder head gasket 

Cylinder head gasket is slightly damaged or not 
pressed tightly, after the engine starts, oil appears in 
the water tank due to oil pressure higher than the 
pressure of cooling system which causes oil entering 
into cooling system along the damage of cylinder 
head gasket. In case of this malfunction , 
disassemble the engine to check cylinder head and 
its gasket, cylinder block surface, repair or replace it 
and then tighten it in accordance with standard 
torque; 

Cylinder head or cylinder block deforming 

Check whether cylinder head or cylinder block is 
deformed, if any, repair or replace it; 

There is crack on the cylinder head   

There is crack inside oil way of cylinder head, and 
the crack is enlarged once heated, therefore oil 
enters into cooling system through it. In this case, 
check carefully that there is any crank on the cylinder 
head, use instrument if necessary, if any, replace it;

There is crack on the cylinder block 

There is crack inside oil way of cylinder block, and 
the crack is enlarged once heated, therefore oil 
enters into cooling system through it. In this case, 
check carefully that there is any crank on the cylinder 
block, use instrument if necessary, if any, replace it;

Oil appears in the water 

tank during engine 

operation 

Automatic transmission fluid and radiating 
pipe connect and oil enters 

In case of this malfunction , the pipeline must be 
treated timely, the malfunction  exists in automatic 
transmission type Geely Vehicle; 

 

 
 

 

 

63 

 

Replace   

Oil existing in the water tank 

Man-made trouble 

Malfunction of cylinder head 

Cylinder head or cylinder block 
deforming 

There is crack on the 
cylinder head 

There is crack on the cylinder 
block 

Automatic transmission fluid and radiating pipe 
connect and oil enters 

Replace 

Replace 

Replace 

Replace 

Replace 

 
 

 

 

64 

 

No. 036 There is water in the oil   

Malfunction Cause 

Solution 

Man-made 
malfunction  

During engine repairing, there is water mixed into crankcase, oil mixes with water 
and color changes after the engine operates to normal water temperature. This 
malfunction    can be eliminated by changing oil; 

Malfunction of 
cylinder head gasket 

Cylinder head gasket is slightly damaged or not pressed tightly, after the engine 
starts, water enters into crankcase through cylinder head gasket. In case of this 
malfunction , disassemble the engine to check cylinder head and its gasket, cylinder 
block surface, repair or replace it and then tighten it in accordance with standard 
torque; 

There is crack on the 
cylinder head 

There is crack on cylinder head, and the crack is enlarged once heated, therefore 
water enters into crankcase through it. In this case, check carefully that there is any 
crank on the cylinder head, use instrument if necessary, if any, replace it; 

There is water in 

the engine oil 

There is crack on the 
cylinder block 

There is crack on cylinder block, and the crack is enlarged once heated, therefore 
water enters into crankcase through it. In this case, check carefully that there is any 
crank on the cylinder block, use instrument if necessary, if any, replace it; 

 

Check 

There is water in the oil 

Man-made trouble 

Malfunction of cylinder head gasket 

There is crack on the cylinder head 

There is crack on the 
cylinder block 

Replace   

Replace   

Replace   

Normal 

Normal 

Normal 

Incorrect 

Damaged 

Crack 

Crack