After the engine cooling system malfunction indicator light illuminates, immediately stop the vehicle for inspection. The cooling system light is illuminated (red), indicating that the coolant temperature is too high or the coolant level is too low.
1. Engine overheating
Bubbles: The air in the antifreeze will produce a lot of foam under the agitation of the water pump, which will hinder the heat dissipation of the water jacket wall.
Scale: Calcium and magnesium ions in water will slowly form scale after a certain high temperature, which greatly reduces the heat dissipation capacity. At the same time, it will also partially block water channels and pipes, preventing antifreeze from flowing normally.
Dangers: Engine parts expand due to heat, destroying normal assembly clearance, affectingboth inflation of the cylinder, reducing power and reducing the lubricating effect of engine oil
2. and leaks
Ethylene glycol is very corrosive to water tanks. And with the failure of antifreeze preservatives. Causes corrosion of radiators, water jackets, water pumps, pipes and other parts.
Detailed information
Maintenance
1. Selection of cooling water: River water with low hardness, such as well water, should be used. to be used. Boil and soften before use. It is best to use antifreeze.
2. Pay attention to the technical condition of each part: if the radiator leaks, it must be repaired. If the water pump or fan runs or makes abnormal noises, it needs to be repaired. should be repaired in time. If the engine overheats, you must quickly check if there is a lack of water, stop the engine. After coolingent, add sufficient cooling water. If the thermostat does not work properly and makes the engine operating temperature too high or too low, it should be repaired or replaced in time.
3. Inspection and adjustment of fan belt tightness: If the fan belt tightness is too weak, it not only affects the cooling air volume and increases the workload of the engine, but also accelerates the wear of the belt due to slipping. If the belt is too tight, it will accelerate wear on the water pump bearings and generator bearings. Therefore, the tightness of the belt should be checked during use and adjusted if necessary. If it does not comply with regulations, it can be adjusted by changing the position of the generator and the adjustment arm.
4. Clean the scale regularly: after a certain period of use of the engine, scale will be depositeda in the water tank and radiator, which will affect heat dissipation. It must therefore be cleaned regularly. The cleaning method is to add sufficient cleaning fluid to the cooling system. After a while of soaking, start the engine and run it at low to medium speed for a while, then release the cleaning fluid while it is hot. then rinse it with clean water.
What are the dangers if the cooling water temperature of the power plant is too low?
(1) The copper pipe of the water cooler is leaking, making the generator cooling water hard.
(2) The amount of ammonia added in the first stage is too high, causing the conductivity of the generator cooling water to exceed the standard.
(3) Corrosion of copper pipes increases the copper content of water.
(4) If the exchange volume of eau of the water cooling box is too small, this will also cause the content of impurities in the water cooling system to increase.
(5) When using secondary desalinated water as the cooling water source for the generator, pay attention to the water quality of the condensate tank.
The generator cooling water temperature is too low, which often damages the unit:
1. The temperature in the combustion chamber of the diesel engine will be too low. Once the diesel is injected, it will not be easy to atomize and burn it. Some diesel will always be discharged with the exhaust gases as exhaust gas. mist droplets and the smoke will be white.
2. The fuel is not completely burned and forms a colloid, which causes the piston ring to get stuck in the piston ring groove, blocking the valve and the pressure in the cylindre decreases at the end of the compression. Certain combustion products combine with condensed water in the cylinder to generate acidic substances that corrode the cylinder and significantly increase engine wear.
3. If the water temperature is too low, the engine oil temperature will also decrease, the engine oil will become thicker, the fluidity will become poor, and the oil volume of the oil pump will decrease, resulting in decrease in water temperature. in case of insufficient oil supply, in addition, the clearance of the crankshaft bearings will become smaller, which will lead to poor lubrication.