Причины, по которым сильно греется двигатель

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С приходом жаркой летней погоды многие автомобилисты начинают сталкиваться с серьезной проблемой – у них греется двигатель их автомобиля. От этой неприятности не застрахованы ни владельцы престижных иномарок, ни хозяева отечественных авто. В нашей статье мы расскажем о причинах, вызывающих перегрев двигателя.

Чаще всего мотор перегревается, при движении в пробках. Несколько десятков остановок и троганий приводит к тому, что стрелка указателя температуры поднимается до критического значения. Отметим, что допускать постоянный перегрев нельзя, так как это может привести к серьезным поломкам в моторе.

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Причин, которые вызывают перегрев агрегата, достаточно много. Наиболее вероятной считается неисправность крыльчатки водяной помпы. Насос системы охлаждения – это одна из самых важных деталей данного узла, обеспечивающая нормальную циркуляцию охлаждающей жидкости. В результате выхода из строя насоса жидкость застаивается на одном месте и начинает закипать, вследствие чего и перегревается двигатель. Устранить эту неисправность можно лишь одним способом – купить новый водяной насос.

Обрыв ремня водяного насоса

Рабочая температура двигателя при такой неисправности начнет неуклонно расти, так как в системе прекратилась циркуляция охлаждающей жидкости. Выявить эту неисправность можно визуальным осмотром моторного отсека.

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Также ремень может заклинить, об этом будет свидетельствовать появившийся визг ремня. При появлении такой проблемы советуем ехать к ближайшей ремонтной мастерской, так как самостоятельно устранить ее весьма затруднительно.

Неисправный термостат

Проблемы с этим устройством обычно проявляются в холодную пору года. Характерными признаками неисправного термостата является увеличение времени нагрева мотора и постоянные колебания температурного режима во время движения. Зачастую термостат просто клинит в определенном положении, в результате чего эта деталь не обеспечивает нормальной циркуляции охлаждающей жидкости и теплообмен. Выход из положения – замена термостата. Кстати, некоторые автомобилисты на летний сезон просто вынимают термостат. При этом их автомобиль никогда не перегревается. Ну а с наступлением холодов они ставят его на место.

Система зажигания и свечи

Нестабильная работа двигателя «на холодную» — главный признак появившейся неисправности в системе зажигания. Двигатель может «троить», замечается падение мощности при разгоне.

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Причина – плохой контакт в высоковольтных проводах системы зажигания. Кроме этого, проблема может заключаться в свечах, которые уже выработали свой ресурс.

Утечка охлаждающей жидкости

Утечка тосола приводит к тому, что мотор активно греется. Определить проблему достаточно просто. При достижении стрелки указателя температуры к красной зоне, включите печку. Если из воздухопровода идет холодный воздух, значит в системе недостаточное количество охлаждающей жидкости.

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Продолжать движение с недостаточным количеством тосола или антифриза весьма опасно. Остановитесь, поднимите капот и осмотрите подмоторное пространство. Чаще всего мотор греется из-за негерметичности патрубков. При невозможности заменить патрубки, нужно замотать их изолентой и ехать к ближайшему СТО. При этом советуем долить охлаждающую жидкость до нужного уровня.

Воздушная пробка

Если вы отмечаете, что ваше авто греется через каждые 1-2 часа, то, возможно, в системе охлаждения образовалась воздушная пробка. Устранить эту неисправность можно самостоятельно. Загоните ваш автомобиль на наклонную поверхность передком (идеальный вариант – эстакада). Открутите крышки расширительного бачка и радиатора, а затем просто подождите десять минут. За это время воздух, образовавшийся в системе охлаждения, должен будет выйти. Это самый простой, но в то же время и самый эффективный способ устранения воздушной пробки.

Неисправность вентилятора

Работа этой детали связана с электронным датчиком, который включает крыльчатку при повышении температуры двигателя. Если вентилятор не включается, то проблема скрывается в датчике. В случае выхода из строя датчика, его нужно просто заменить. Чтобы добраться до ремонтной мастерской, можно принудительно включить вентилятор. Для этого требуется снять клемму, которая идет от вентилятора к датчику.

Забитый радиатор

Наличие отложений внутри системы охлаждения может привести к засорению каналов радиатора. Грязь засоряет соты радиатора и не пропускает охлаждающую жидкость в двигатель. Прочистка или продувка радиатора поможет справиться с этой проблемой.

В завершение нашей статьи хотелось бы дать один небольшой совет. Определить перегрев двигателя, находясь на водительском месте, не так уж и просто, поэтому советуем вам выработать стойкую привычку – посматривать на стрелку указателя температуры. Так вы всегда сможете выявить появившуюся проблему и, возможно, избежите проведения дорогостоящего ремонта вашего ДВС.

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