4 Most Important Maintenance Tips For Your Diesel Engine

Oct 28, 2022

Even with the rising popularity of electric vehicles, truck lovers have plenty of reasons to stick to their diesel-powered engines. A diesel-fueled engine can offer better fuel economy, lower emissions, and less maintenance than the typical gas-powered vehicle. And truck manufacturers are pushing back against diesel regulations promising that diesel engines aren’t going anywhere anytime soon.


Diesel engine maintenance is important and there are even things that can be performed at home. To keep your diesel vehicle running the way it should, there are a few things you should be doing regularly.


Top Maintenance Tips For Diesel Engines

Ready, Set …


1. Dust off your diesel engine. 

Beautiful machines need to be shined up every once in a while! Diesel engines tend to last longer than gas-powered engines, so they’ll benefit from more frequent cleaning. With more challenging terrain and heavier loads, diesel-fueled engines have more opportunities to collect dust, dirt, and grime.


More dirt on your engine equals a shorter lifespan and less fuel efficiency. In areas with extreme weather, a diesel engine might collect road salt, moisture, or environmental factors that could cause the components to rust or disintegrate. 


Before cleaning, make sure the engine is cooled. Grab some gloves, an old toothbrush, a wet sponge, and a powerful degreaser. You may want safety goggles as well. Use plastic grocery bags to cover any parts that might not be waterproof. 


After you’ve checked in with your owner’s manual, hose everything down and get to scrubbing! Use the degreaser to safely dissolve built-up and grime, then wipe away with a wet sponge or paper towel. A toothbrush can help you get an especially thorough clean.


2. Air it out.

If your air filter is dirty, it can choke the engine. It’s such an easy fix that it’s easy to forget, too! Most vehicles, including diesel engines, have an air filter under the hood. The air filter is usually in a rectangular box found near the front of the engine compartment. 


If the filter is dirty or clogged, your engine is forced to use more fuel to achieve the desired power and acceleration. It’s a good idea to replace your air filter every 12,000 miles or sooner if you notice decreased engine power or weaker acceleration.


3. Cool it down. 

Diesel engines can get pretty hot– hotter than gas motors. Since the radiators are subjected to higher temperatures, diesel engines are more likely to overheat. Overheating can warp components and cause serious damage, eventually resulting in engine failure.


An easy way to prevent overheating in your diesel vehicle is to regularly maintain your cooling system. Regular maintenance can include coolant or radiator exchanges. 


  • The coolant, or antifreeze, contributes to the cooling process by transferring heat from the engine to the radiator to the air. The antifreeze then repeats this process of transferring heat away from the engine. In diesel engines, the coolant should be replaced every 30,000 miles


  • A radiator exchange typically includes a deep flush of the cooling system and radiator. The antifreeze works to get rid of rust and other impurities. Most manufacturers recommend radiator fluid exchanges every 50,000 miles. 


4. Replace the fuel filter in your diesel engine.

Diesel engines generally have two fuel filters, as opposed to a single. The primary fuel filter sits between the engine and the gas tank, and the second filter sits between the transfer pump and fuel injectors. 


Since diesel fuel absorbs condensation from the tank, it’s important to replace your primary filter and secondary filter every 10,000 to 15,000 miles, before the filters lose their effectiveness. We recommend replacing the primary and secondary filters at the same time to guarantee optimum performance. 

What happens if you don’t replace the fuel filters?

If too much water gets in your diesel fuel, it can cause damage to your engine. The engine may stall, lose horsepower, or cause the fuel injectors to explode.


Diesel Maintenance and Repair in Tempe, AZ

Just because a diesel engine may require less frequent maintenance doesn’t mean maintenance isn’t necessary! Preventative maintenance will keep your diesel vehicle running longer and save on bigger costs later. 


When you choose diesel power to get you to where you need to be, you choose reliability. But you’ve got to show your diesel vehicle some tender loving care! At We-Fix-It, we specialize in diesel maintenance and repair. Bring your diesel-fueled vehicle in to be assessed by our experienced technicians today. We’re happy to answer your preventative maintenance questions.

Are you ready to schedule your vehicle for service at We Fix It?

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