20 Nov '11, 1pm

@TalllF هذا رابط اتمنى الكل يستفيد منه فيه شرح مفصل يقنعك ان تحميه السياره الصباح مايفيدها بل يضرها

@TalllF هذا رابط اتمنى الكل يستفيد منه فيه شرح مفصل يقنعك ان تحميه السياره الصباح مايفيدها بل يضرها

The problem is, letting your car sit and idle is the slowest way to bring it up to operating temperature because it’s generally sitting in your drive at just above idle speed. And this method to warm up also invites other problems. Remember that modern cars are equipped with a multitude of devices to help them run clean, including a catalytic converter (sometimes three of them), a device in the exhaust system that works to burn off unburned hydrocarbons in the exhaust stream. A cold engine emits a far higher percentage of unburned hydrocarbons than a warm engine. Unfortunately, the average catalytic converter can’t process 100 percent of unburned hydrocarbons even in the best of times. Importantly, the catalytic converter needs high exhaust temperatures to work properly. Throw in a cold engine emitting a high percentage of unburned hydrocarbons, repeat several hundred time...

Full article: http://www.motherearthnews.com/ask-our-experts/car-engine...

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