What Causes a Diesel Engine to Frequently Overheat and Boil?

[LaEthan]

Diesel engines frequently overheating and boiling can be attributed to the following reasons: 1. Increased oil level in the diesel engine oil pan: During operation, engine oil is normally consumed and gradually decreases. If the oil level does not decrease but instead rises, it indicates a fault in the diesel engine. The water seal ring between the lower part of the cylinder liner and the cylinder block is improperly installed, with excessive protrusion. Forcibly pressing it in can shear the water seal ring, causing coolant from the water jacket to leak into the oil pan. Long-term overload operation of the diesel engine can cause the engine to overheat, leading to heat-induced aging and deterioration of the water seal ring, resulting in water leakage. 2. Diesel fuel entering the oil pan: Diesel fuel entering the oil pan increases the oil level, dilutes the oil, reduces lubrication performance, and accelerates component wear or causes bearing seizure. If the needle valve assembly of an individual cylinder's fuel injector is stuck or the injection pressure is too low, a large amount of unatomized diesel fuel is injected into the cylinder, failing to completely combust and flowing into the oil pan in liquid form along the cylinder walls.