Six Tips for Diesel Engine Beginners

by Jason Lancaster

Diesel engine fans will rapture on about the impressive combination of power and fuel efficiency that modern diesel engines carry. Environmentally friendly and fairly low maintenance, diesel engines have been popular for years in Europe, and that popularity is finally beginning to grow in the United States as well. With all their benefits, diesel engines may very well become more popular than gas engines! Here are some tips to consider if you, like most U.S. drivers, are fairly inexperienced with diesel engines.

1) Virtually all new diesel engines are equipped with a turbo-charger, which works like a jet engine, forcing outside air into the engine. This increases efficiency and performance. Turbo-chargers are very powerful, so it’s important that the air entering is clean and free of detritus. You can make sure of this by keeping the air filter on your engine clean and changing it often. Most vehicles are equipped with electric sensors which alert you when your air filter needs changing. Pay attention to this! Ignoring this alert could damage your engine.

2) Diesel fuel isn’t as clean and pure as gasoline, so the fuel filter in a diesel engine is very important. Again, your car has sensors that will warn you if the fuel filter becomes clogged, and you should react to these warnings quickly. If you fail to change a clogged diesel fuel filter, it could leave you stranded on the side of the road. Also, keep in mind that diesel fuel filters need to be changed a little more often than gas fuel filters, so don’t be surprised if you have to replace your diesel’s fuel filter ahead of schedule. That’s perfectly normal.

3) You may be surprised to learn that diesel fuel contains water! A little bit of water won’t damage your engine, but the vast majority of modern diesels are fitted with water/fuel separators regardless. Some vehicles may require you to manually remove the water from the diesel’s fuel system. Your owner’s manual will tell you how to do this, and how often to do it. If DIY is not your thing, many service facilities are willing to do this for you at little to no charge, and will dispose of the water/fuel solution in an environmentally friendly manner.

4) Diesel engines are often referred to as “oil burners” because unlike gasoline engines, diesel engines typically burn some of the engine’s lubricating oil during normal operation. That’s why it’s especially important to check your diesel’s oil level between oil changes. To check the oil, make sure the engine has cooled for at least 30 minutes, and that the vehicle is level. Your owner’s manual will explain when you should add oil based on the engine’s dipstick reading.

5) Diesel engines and coldness don’t get along. Low temperatures will cause your diesel engine to start harshly and warm up slowly. Extremely low temperatures of -10F or lower may cause your diesel engine to not function at all. Always remember to use your diesel’s block heater whenever the temperature hits below zero. The block heater is a simple electrical plug on your car which keeps your engine warm, using your home’s electrical source. All you have to do is plug your car in at night. You can also plug it in whenever the temperatures drop below freezing, if you can afford the electricity. Using your block heater will protect your engine, and will ensure smooth start-ups and quick warm-ups. Your owner’s manual will help you locate the block heater on your vehicle.

6) All new engines have a break-in period, and new diesel engines are no different. The break-in for a new diesel is usually from 500 to 1000 miles. Check your manual to find out what the average period is for your vehicle. During this break-in period, manufacturers will recommend that you do not drive at sustained speeds, such as on long trips on the highway, and do not haul or tow anything. Your engine will continue to improve in power and efficiency for 20,000 to 30,000 miles after the initial break-in period is over, since diesel engines reach their peak performance levels after lots of time and use. Most long-time diesel engine owners say their diesel began to truly perform only after a year or two of use.

To summarize, it’s very important that new or first-time diesel owners review their engine manual. In addition to normal vehicle maintenance, diesel owners should keep a close eye on their air and fuel filter warnings, they should always check engine oil between oil changes, purge water from the fuel system as required, and remember to plug in the block heater any time outside temperatures drop below zero degrees Fahrenheit. When you do all these extra tasks, your diesel engine will reward you with power, great fuel economy, and 200,000+ miles of good service.

About the Author:
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