Diesel engines, particularly, are long-lasting and durable compared to their gasoline equivalents. A properly maintained diesel engine can last for hundreds of thousands of miles without any problems, which makes it a popular choice for many cars, machinery, and heavy machinery.
But the longevity of a used diesel engine also has a lot to do with how well it is maintained, even more than with a new engine. With proper maintenance routines and attention to detail, you can greatly prolong the life of your diesel engine.
The following are a few things you can do to make your diesel engine last and run as long as possible.
Regular Oil Changes
Oil is the life of any engine, and diesel engines are no different. Engine oil degrades over time and gets clogged with soot, dust, and combustion byproducts. Periodic oil changes are essential in keeping the engine lubricated and free of dangerous particles. Used diesel engines normally need to be changed more often, depending on their age and usage.
It’s necessary to adhere to the recommended oil change frequency by the manufacturer, but as a guideline, it is advisable to change the oil after 3,000 to 5,000 miles for a used diesel engine. This will assist in avoiding premature engine wear, lowering the risk of carbon buildup, and ensuring optimal engine performance.
When selecting oil for your diesel engine, always use high-quality, diesel-specific oils. These oils are formulated to deal with the high temperatures and pressure that diesel engines tend to work under. Diesel engine oils also contain detergents and additives that will clean the engine and prevent sludge buildup.
Utilize High-Quality Fuel and Fuel Additives
The type of fuel you use affects the performance and lifespan of a diesel engine. Low-quality diesel fuel might have impurities and contaminants that can clog fuel injectors, destroy the fuel pump, and result in poor combustion. Use high-quality diesel fuel from trusted sources to reduce the chances of these problems.
Along with good-quality fuel, use fuel additives that can enhance combustion efficiency, inhibit carbon deposit formation, and maintain the cleanliness of the fuel system. Diesel fuel additives also enhance cold-weather operation and inhibit the growth of algae or bacteria in the fuel tank. These additives can be particularly useful for older diesel engines since they counteract the natural wear and tear that accumulates over time.
Regularly Monitor and Replace the Air Filter
An air filter keeps dirt, dust, and other contaminants from entering the engine, which can cause excessive wear and damage. For used diesel engines, it is important to keep a close eye on the air filter and replace it at regular intervals. A dirty or clogged air filter limits airflow to the engine, which can reduce fuel efficiency, raise exhaust emissions, and put a strain on the engine components.
Depending on the working environment of the machine or vehicle, you might have to replace the air filter more regularly. In off-road or dusty conditions, it’s recommended that you inspect and replace the air filter every 10,000 to 15,000 miles. Clean air improves combustion and engine life, so ensure that the filter is clean.
Check the Cooling System
Diesel engines generate a significant amount of heat during operation, and the cooling system plays a crucial role in regulating the engine temperature. If the engine overheats, it can cause irreversible damage, such as warped cylinder heads or a cracked engine block. For a used diesel engine, regular maintenance of the cooling system is especially important, as older systems may be more prone to leaks or inefficiency.
To make sure your cooling system is in good working order, periodically inspect the radiator, coolant level, and hoses for signs of wear or leaks. Flush the cooling system every 2 to 3 years, or as recommended by the manufacturer, to avoid corrosion and debris buildup. The proper type of coolant must also be used, since the wrong fluid will gradually damage the components of the engine.
Check the Turbocharger (If Equipped)
Most diesel engines, especially those used in heavy-duty service, come with a turbocharger to enhance power and fuel efficiency. The turbocharger is meant to boost the power of the engine by forcing additional air into the combustion chamber. Just like any other component of the engine, the turbocharger needs proper maintenance to continue functioning in optimal condition.
If your older diesel engine features a turbocharger, be particularly mindful of the oil that is used to lubricate the turbo, and have it changed often. The bearings of the turbocharger are very sensitive to oil quality, and the wrong oil or not changing it often enough can cause excessive wear. Additionally, avoid shutting down the engine immediately after heavy use, as this can cause the turbocharger to seize due to residual heat. Allow the engine to idle for a minute or two to cool down before turning it off.
Perform Regular Inspections
Regular inspections are a primary part of taking care of a diesel engine. Inspecting the engine for wear and tear or possible faults will allow you to catch issues early on before they become critical. Be very aware of the following:
Belts and Hoses: Look at the belts and hoses for cracks, leaks, or any other signs of wear. Replace them if they exhibit any kind of damage.
Injectors: Fuel injectors get clogged over time, resulting in bad performance and reduced fuel efficiency. Keep checking and cleaning the injectors for normal functioning.
Exhaust System: Check the exhaust system for leakages or blockages. A faulty exhaust system causes poor engine functioning and higher emissions.
Compression: Periodically check the engine’s compression to make sure that the internal parts are still in good condition.
By being on top of these inspections and catching small problems before they become big ones, you can keep your used diesel engine purring for decades.
Conclusion
Extending the life of a used diesel engine is not luck, but a result of careful maintenance and attention to detail. If you stick to the procedures outlined above, including regular oil changes, the use of good fuel, keeping an eye on the cooling system, and regular inspections, you can extend the life of your diesel engine by a considerable amount.
Diesel engines are built to last and can endure the test of time, but their lifespan is heavily dependent on the level of care they receive. With proper maintenance and use, you can have your diesel engine run smoothly for years to come.
