Eurasian Journal of Engineering and Technology

Maintenance and Maintenance Technology 
of Cooling System. 
1. The main problems of cooling system, their 
symptoms and causes. 
2. Maintenance and Maintenance Technology 
of Cooling System. 

---

Volume 5| April, 2022 ISSN: 2795-7640
Eurasian Journal of Engineering and Technology
www.geniusjournals.org 
P a g e
| 108 
3. New technology for collecting slag from the 
boiling water in the cooling system. 
Major faults in the heating system: failure of 
sealant, leakage of fluid from water pump, 
patrol and other areas, insufficient bandwidth, 
cracking, breakage, failure of the 
thermostat valve, openings of the pump blade, radiator cover sediments / sedimentary rocks. 
Defects of the cooling system can be attributed 
to the following external features: Engine is 
heated for a long time, even when it is not 
working properly, if the fuel is burned and 
burned, radiator fluid will boil if the appliances 
are not adjusted properly. If the thermostat 
valve is opened slowly or is completely open 
(after engine start), the engine will warm up 
more slowly, and if the valve goes on, the engine 
will warm up faster. 
The system is diagnosed before maintenance 
and repair, to check its fever and seal, the 
bandwidth, and the operation of the thermostat. 
In normal operation of the engine, the cooling 
system fluid temperature should be within the 
range of 80-95C, and the temperature of the 
upper and lower parts of the radiator is in the 
range 8-12C. The leakage of the cooling system 
fluid can be traced to the fluid traces in the 
lower parts of the water pump (and other 
compounds). Control of this is done in the cold 
state of the engine. 
The tightness of the system is checked by the 
pressure of air (0.06 Mpa), which is injected into 
the upper fluid part of the radiator. The voltage 
of the fan and the bandwidth is checked by 
checking the tape at a distance between the 
screws (30-40N power). Thickness of the belt 
should be 10-20 mm (for different engines). 
The removed thermostat is immersed in a 
heated water bath and checked for 
performance. At the initial opening of the 
thermostat valve, the fluid temperature is 65–
70C and at full opening 80–85C. Replace 
defective thermostat. 
The cooling system consists of adjusting the fan 
belt, tightening the hose joints, changing the 
pump pump if necessary, and cleaning the 
system. The system is rinsed with water or a 
mixture of 0.02-0.03 MPa. The washing 
direction of the system is in the opposite 
direction to the cooling process. The goverment 
worsens the heat exchange process. Scientific 
studies show that a 1 mm deflection can reduce 
the cooling intensity by 25%, the power by 6%, 
and the fuel consumption by 5%. Hakip is 
washed with chemical impurities. Washing the 
cooling system in a mixture of sulfuric acid 
softener and foam exchanger is very effective. 
The mixture is filled into the system for 10-15 

---