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Should You Allow Diesel Engine To Warm Up Before Driving Off? The Technical Perspective

Warming up an engine before moving ahead is a universal practice that drivers have been using since ever. You may be all cool with warming up your gasoline engine, but what’s up with diesel engines is a matter of interest. If perplexed whether should you allow diesel engine to warm up before driving off or not, reading on, can come in handy.

Should You Allow Diesel Engine To Warm Up Before Driving Off? A Detailed Analysis

Diesel engine wholly relies on compression of the air for ignition. When starting from a dead point, one needs to make sure that the engine gets the heat it demands. Is idling the solution to the problem? And, if yes, how long should a diesel engine warm up? Let’s get deeper into the conversation.

1. The Concept Of Pre-Heating

Starting from the scratch, you should know what glow-plugs are. This device is a heating device that facilitates smooth starting of a diesel engine. It becomes tricky sometimes to start off a diesel engine owing to the lack of heat of compression. That is why; a glow plug is embedded to simplify the task.

In some moderately old vehicles, the glow-plug gets automatically lit up when the driver rotates the key to the “ON” position. The longer is the idling duration; better is the heating of the engine. This process is known as pre-heating. Many of latest diesel engines though, simplify the pre-heating process even further. The moment a driver unlocks his car or opens the door, the glow-plugs get activated, thus lesser the idling time. Coming to should you allow diesel engine to warm up before driving off, the answer is, undoubtedly yes.

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Should you allow diesel engine to warm up before driving off explained

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2. The Pre-Heating Time Span

Thanks to technology, the newer cars have a display light indicating for how long should a diesel engine warm up. There is a symbol that lights up as soon as you put in that key or open the car’s door. In older cars, the wait time was around 20 seconds. On the other hand, in cars with newer engines, only 6-8 seconds wait time before starting off is required.

Once you start driving down the road, the glow-plug get switched off. One should know that if your engine was recently given power, you wouldn’t have to wait. That implies that you can just simply put in the key and drive off without waiting a moment. Same goes the case when the outside temperature is hot!

3. The Downsides Of Pre-Heating

The carbon emissions in the environment are ever-increasing. That is why; several emission regulations are put to use by compliance bodies around the world. Idling or pre-heating as you may call it also emits harmful emissions into the environment. Car manufacturers have thus enabled a system where the glow plug would light up only when the engine starts. The glow plug is also liable to switch on when the engine temperature has decreased exponentially.

Explaining Should you allow diesel engine to warm up before driving off
Should you allow diesel engine to warm up before driving off

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The engine life would also be affected when idling over-excessively. Alternatively, you could start off on your journey without waiting much but moving on slowly. You could also go through driving tips, to grab some knowledge of useful driving techniques.

Wrapping Up

Now that you are clear on should you allow diesel engine to warm up before driving off, you would not mess up. Always remember; never give an aggressive start to your cold diesel engine as this may prove to be most damaging.

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