Six Things to Know If You're New to Diesel Engines

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Six Things to Know If You're New to Diesel Engines

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If you're looking at a diesel engine, you're probably impressed with their combination of power and fuel efficiency. Modern diesel engines are environmentally friendly and fairly low maintenance. Europeans have enjoyed diesel powered vehicles for years, which are finally starting to catch on in the United States. Considering all their benefits, it's quite possible that diesel engines will one day be more popular than gas engines. Since most U.S. drivers have limited experience with diesel engines, here are some tips for new diesel drivers.

1) Most new diesel engines come with a turbo-charger, which sucks outside air into the engine, increasing efficiency and performance. Turbo-chargers are very powerful pieces of machinery, and require clean air that is empty of debris. Thus, it's vital that you clean and change the air filter on your engine frequently. The majority of diesel engine vehicles are equipped with electronic sensors which will tell you when you need to check or replace your filter. Always change your filter as soon as the sensor tells you to! Delaying or ignoring this alert altogether can result in a damaged 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 already know that diesel fuel is less pure than gasoline, but you might not have known that it also contains water. Small amounts of water won't damage your engine, however, almost all modern diesels have water/fuel separators anyways. Some models may require manual purging of water from the diesel's fuel system. If you're doing this yourself, your owner's manual will tell you how to do this, and how often you should perform this action. Otherwise, there are many service facilities who will do this for little to no charge, and will dispose of the water/fuel mixture in an environmentally safe way.

4) Diesel engines are "oil burners", typically burning some of the engine's lubricating oil during normal operation. This is why it's so important to check your diesel's oil levels often, even between oil changes! Before checking the oil, make sure the vehicle is level and allow the engine to cool for at least 30 minutes. Your owner's manual will explain how to determine if you need to add more oil, based on your 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.
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