The reasons why the generator set coolant floats with the oil are:
① The center tube of the water-cooled oil radiator is broken or unwelded, causing oil leakage. oil in the coolant. .
② The cylinder seal is damaged, causing the lubricating oil hole and the cooling water hole to communicate, causing oil and water to mix.
③ The quality of the cylinder block or cylinder head is poor. There are blisters on the partition between the water channel and the oil channel, and the oil is leaking into the coolant.
④ The joint connecting the oil cooler and the cylinder oil inlet and outlet is damaged and the oil is leaking.
Problem diagnosis and treatment methods:
① If you find oil floating on the coolant level, you can first drain the coolant from origin, rinse the channelto the cooling, then add it after it is rinsed. When using a new coolant, observe the time and amount of oil floating on the surface of the fluid to determine the treatment method.
② If the engine has been used for more than a month before the appearance of floating oil and the oil quantity is very low, repairs may not be carried out for the moment. Check and repair when assembly is complete. The machine is repaired and water will not enter the lubrication system. This is because even if there is a very small perforation somewhere, since the oil pressure when the engine is running is always higher than the coolant pressure, the oil flows into the water channel under the action of the pressure difference when the engine stops operating. , the oil pressure decreases and there is no longer any leak in the cooling water jacket. Even though heIf there is some water pressure at the small hole, it is not enough to overcome the resistance of the oil with higher viscosity in the small hole, so the coolant cannot. enter the oil.
It should be noted that you should check if there is a change in the amount of oil floating on the coolant level before leaving or after closing the car. When the floating amount of engine oil suddenly increases, it should be repaired in time.
③ When disassembling and inspecting, first check whether the oil cooler is damaged. If there is a leak here, the oil cooler gasket or core needs to be replaced. When replacing, pay attention to the flatness of the joint and the tightness of the fixing bolts.
④ If the oil cooler is in good condition, remove the cylinder head and check the cylinder head and cylinder block for cracks, blisters and damage.other defects. If trachoma is detected, it can be sealed with an anti-leak agent.
⑤ Carefully observe the water jacket hole and the cylinder seal oil hole for signs of flushing and leaking. If so, use fine asbestos wire to apply the sealant for bonding. When pasting, care must be taken to ensure smoothness and not to be too thick to avoid further leakage. If the cylinder seal is seriously damaged, it should be replaced in time.
⑥ Pay attention to the method when tightening the cylinder head bolts. The bolts should be tightened to the specified steps and torque.