warum- und kaltfahren
English translation: warm up and cool down
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| 22:43 Oct 11, 2017 |
| German to English translations [PRO] Tech/Engineering - Automotive / Cars & Trucks / Turbochargers | |||||||
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|  Selected response from: Vere Barzilai Israel Local time: 19:30 | ||||||
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| 4 | The driver must use the appropriate procedures for driving a warm/ cold engine |
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| 4 | warm up and cool down |
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| Discussion entries: 7 | |
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Answers
11 hrs confidence: 
The driver must use the appropriate procedures for driving a warm/ cold engine Explanation: "Warmfahren" is when you drive a car that has been warmed up, i.e. driven, or the engine was turned on for a certain period. A neighbor of mine does that even during the summer. "Kaltfahren" is when you 1.) start a car that has been sitting a while. 2.) It also has to do with oil residue. There is more residue if the motor is cold. The oil needs to be hot in order to grease correctly, and the car can't be driven with abandon (pedal to the metal) if it doesn't have a certain temperature. But the oil can burn if it exceeds a certain temperature, so it's best to drive with the engine making a low number of revolutions per minute. https://www.youtube.com/watch?v=fGAnn6F3VVY |
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12 hrs confidence:
warm up and cool down Explanation: cool down period allows for circulating engine oil to remove heat from the turbocharger so that the engine oil does not "cook" in the turbocharger upon shutdown. Recommended cool down on idle. There is really no reason to "cool down" a turbo-diesel these days, but you won't hurt anything by doing it either. You can still find people who swear you have to do it, maybe they just like to sit and listen to the radio. -------------------------------------------------- Note added at 4 days (2017-10-16 06:35:17 GMT) Post-grading -------------------------------------------------- Thanks Marc Reference: http://www.dieselhub.com/tech/warm-up-cool-down.html |
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