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Marine Diesel Engine Maintenance And Cooling Systems

diesel engine maintenance

Performing routine diesel engine maintenance of the engine’s cooling system is an essential part of ensuring the longevity of the engine. Diesel engines are considered some of the most reliable, durable, and efficient machines in the world. Nevertheless, they require routine inspection and maintenance of their various internal systems. 

The engine cooling system of your marine diesel engine is one of the most important systems that comprise the engine. Understanding the cooling system can help you troubleshoot potential problems. It can also help you identify an issue before it becomes a major problem. Continue reading to learn more about the cooling systems of marine diesel engines. 

Marine Diesel Engine Raw Water Cooling

An efficient solution to pumping raw water is flexible impeller pumps. The main advantage of a flexible impeller pump is that it is self-priming. This means that they are able to create their own vacuum when the vanes of the impeller are depressed and rebound. A dry pump can lift the water up to as much as three meters. 

A flexible impeller pump that is used for engine cooling does not need to be manually primed. It also does not need to be located below the waterline line. Additionally, a flexible impeller pump can pass the largest solids without compromising or damaging the pump. This reduces the need for filtration of incoming fluids.

In the case of general freshwater applications, the cooling system can benefit from a standard and durable neoprene rubber impeller. It is important to remember that all flexible impeller pumps should never be allowed to run dry for more than thirty seconds. The impeller and the seals need water for lubrication. 

If the impeller is allowed to run dry it can quickly burn out and require diesel engine maintenance and repair. Parts can be replaced by a professional diesel engine repair company.

Fresh Water Cooling

The closed, freshwater circuit of the marine diesel engine’s cooling system will typically use a flexible rubber pump if it is located on the “cold” side of the system. In some cases, belt-driven, centrifugal pumps are used. In a closed-circuit, the heat produced by the marine diesel engine is transferred over to the heat exchanger. 

Cooling Capacity

It is a common misconception to think that the size of the exhaust system and heat exchanger determines the needed output. In fact, the required output of the cooling pump is based on the marine diesel engine’s size and type. This is true in freshwater and raw water handling systems. 

Professional Marine Diesel Engine Maintenance

Ensuring that the cooling system of your marine diesel engine is essential to its performance and longevity. Routine diesel engine maintenance provided by a professional diesel service company is always recommended over D.I.Y. service. RPM Diesel Company has been the number one choice for marine engine service, maintenance, and sales. 

We have continued to build a reputation for excellence and outstanding customer satisfaction since opening our doors in 1956. RPM Diesel Company is also proud to be a factory authorized provider for some of the biggest and most trusted manufacturers in the industry. Contact us today to speak with a marine diesel expert or to schedule a diesel engine maintenance appointment.


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Maintenance Diesel Engine

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