What are common causes of overheating in a diesel engine?

Overheating in a diesel engine is commonly caused by factors that impede the engine's ability to dissipate heat effectively. Low coolant levels can result in insufficient liquid to absorb and carry away heat from the engine components, leading to increased temperatures. A failing water pump exacerbates this issue by reducing or eliminating the flow of coolant through the engine and the radiator, further preventing heat exchange and cooling.

In contrast, high fuel quality and proper air intake contribute positively to engine performance, reducing the likelihood of overheating. Thick engine oil can affect lubrication but is not a primary cause of overheating compared to coolant flow issues. Thus, low coolant levels combined with a failing water pump represent critical failures that can lead directly to engine overheating.