Causes of Cylinder Overflow of 250kw Diesel Generator Set

Feb. 16, 2022

The causes of water overflow of 250kw diesel generator set cylinder can be divided into two types: the cylinder pad of silent generator set is damaged, or the tightening torque of mute generator cylinder head nut is not enough.


1. Diesel generator set water pump failure. We should first check whether the water pump works well. If the water pump transmission gear shaft is worn beyond the limit, it indicates that the water pump has failed to function and can be circulated normally only after replacement.


2. There is air mixed in the cooling system of 250kw diesel generator set, which makes the pipeline not dredged, and the damage of suction valve and exhaust valve on the expansion water tank also directly affects the circulation. At this time, we should often check whether their pressure values comply with the rules. The suction pressure is 10KPA and the exhaust pressure is 40kpa. In addition, whether the exhaust pipeline is dredged is also an important reason affecting the circulation.

Volvo diesel generator

3. The coolant level of diesel generator set is too low or does not meet the requirements. Low liquid level can directly cause the coolant temperature to rise, so that the coolant does not circulate. The coolant is required to be 50% antifreeze + 50% softened water + dca4. If it does not meet the requirements, it will cause pipeline blockage and rust in the pipe wall, making the coolant unable to circulate normally.


4. The thermostat of diesel generator set has disadvantages. A thermostat is installed in the engine combustion chamber to control the temperature of the engine combustion chamber. The thermostat must be fully opened at the specified temperature to facilitate small cycle. If there is no thermostat and the coolant cannot adhere to the circulating temperature, a low temperature alarm may occur.


5. The radiator fin of diesel generator set is blocked or damaged. The cooling fan does not work or the heat sink is blocked, so that the temperature of the coolant cannot be reduced, and the heat sink is rusted, forming a liquid leakage phenomenon or poor circulation.


How to solve the problem of cylinder overflow of diesel generator set?


1. Understand the causes of cylinder overflow of diesel generator set.

It can be divided into two types: the cylinder pad of the diesel generator set is washed out, causing the water tank mouth to overflow and discharge bubbles, showing the boiling state of cooling water, or the tightening torque of the cylinder head nut of the diesel generator set is not enough.


2. After the generator set stops rotating, remove the valve cover, rocker arm seat, etc. and check the fastening nut of the cylinder head. It is found that the tightening torque of the fastening nut is severe and uneven, and some can be screwed with torque. After tightening the nuts from the head according to the torque, install the rocker arm seat and adjust the valve clearance.


3. After maintenance, check whether the overflow problem has been solved.

The specific inspection method is as follows: start the generator set to the rated speed. After running for a period of time, check whether there is water overflow between the cylinder head and the cylinder. If not, the problem has been solved. If there is water overflow, it needs to be renovated.


Dingbo power is a high-tech enterprise integrating R & D, production, sales and service of various generator sets. The company has many products and wide power. It can produce a full range of products from open type, standard type, silent type to mobile trailer.


Dingbo power generator set has good quality, stable performance and low fuel consumption. It is used in public utilities, education, electronic technology, engineering construction, industrial and mining enterprises, animal husbandry and breeding, communication, biogas engineering, trade and other industries. Welcome new and old customers to negotiate business. Contact us by email dingbo@dieselgeneratortech.com.

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