Как быть, если стучит двигатель на ВАЗ- 2107

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Любой двигатель внутреннего сгорания в ходе эксплуатации изнашивается. Связано это с тем, что все его рабочие части находятся в постоянном движении. Проходит какое-то время и в двигателе появляются непонятные стуки и шумы. Многие автомобилисты, услышав неприятный и неизвестный звук из двигателя своего автомобиля, очень сильно расстраиваются, так как считают, что им придется раскошелиться на дорогостоящий капитальный ремонт силовой установки. Поспешу обрадовать таких автомобилистов. Появление какого-то непонятного ударного звука не всегда говорит о надобности серьезного ремонта мотора. В нашей статье мы разберемся в причинах появления стука и выясним что делать, если стучит двигатель на ВАЗ-2107.

Практически 100% автомобилистов связывают появившийся стук в двигателе с клапанами. Ошибиться действительно легко, так как любой стук мотора слышится в его верхней части. Но все дело в том, что двигатель металлический, поэтому стук, даже появившийся в нижней части этого агрегата, равномерно распространяется по всей поверхности. На самом деле причин для появления стука в двигателе ВАЗ-2107 (впрочем, как и в любом другом двигателе) очень много. Мы разберем самые распространенные причины, вызывающие неприятное и пугающее звучание.

Стук шатуна

В первую очередь у двигателя с застучавшим шатуном упадет давление масла. В современных автомобилях практически не ставят датчики, показывающие давление в системе смазки. Зачастую автопроизводители устанавливают контрольную лампочку, загорающуюся при появлении проблем с маслом. Лампочка, конечно, точно не скажет о причине ее загорания, но вы уже насторожитесь и начнете искать проблему. Шатун стучит глухо, с увеличением оборотов двигателя периодичность появления стуков будет возрастать.

Стук в коренных шейках коленчатого вала

Симптомами такого неприятного звука является падение давления в системе и появление глухого металлического стука, который слышно на любых оборотах. Диагностировать эту неисправность можно без разборки мотора. Если вы заливаете в свой двигатель полусинтетическое масло, то вам нужно его поменять на минеральную смазку и тогда шум должен утихнуть.

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Если используете минеральное масло, то при замене на полусинтетику громыхающие звуки должны стать сильнее. При выявлении такой проблемы необходимо разобрать силовой агрегат и произвести расточку коленчатого вала под ремонтные вкладыши.

Стук в холодном двигателе

Запустили холодный мотор и услышали стук, но после прогрева все нестандартные звуки пропали. В такой ситуации нет ничего страшного. Такие шумы появляются в изношенных двигателях, где зазоры между сопрягающимися деталями уже превысили допустимые нормы. Как только двигатель нагревается, все его детали расширяются и занимают свои положенные места, а зазоры возвращаются в допустимые пределы. С таким шумом вполне можно ездить, главное, хорошо прогревайте ваш ВАЗ-2107 перед поездкой.

Шум клапанов

Если хорошо прислушаться, то стучит практически любой мотор и этот звук исходит от клапанов. Первым признаком клапанного стука является появление звонкого металлического гула на любых оборотах (от холостых до максимальных оборотов). Биение клапанов может происходить из-за плохой регулировки или износа «постели» распредвала, а может быть, износился сам рокер клапана. Лечение таких симптомов заключается в правильной регулировке клапанов или замене изношенных деталей.

Стук цепи

Цепь ослабевает и начинает болтаться. Металлический звон хорошо слышно на холостых оборотах, как только обороты увеличиваются, он пропадает или становиться еле слышным. Особенно хорошо слышно как стучит цепь, если стоять возле радиатора. Проверить натяжение цепи просто. Нужно заглушить двигатель и ключом покрутить коленвал. Если цепь ослабла, то вы услышите характерное металлическое звучание. Такой стук не страшен, устраняется он натягиванием цепи. Если же эта цепь уже изношена, то лучше ее заменить на новую.

Стук от распредвала

Звук биения распределительного вала постоянный. Отличается от шатунного более звонким звучанием. Определить эту неисправность можно, натянув сильнее цепь. Если звук изменит тональность, то проблема точно в распределительном валу или в посадочной «постели». Иногда этот звук путают с клапанным и отдают машину на регулировку. Однако после регулировки клапанов звук остается. Поэтому, чтобы не тратить лишние деньги, советуем правильно диагностировать проблему.

Если вы решили заменить распредвал на своем ВАЗ-2107, то советуем покупать вместе с распределительным валом еще и постель вала и рокеры. После такой замены ваш двигатель будет работать мягко и вы надолго забудете о каких-то сторонних шумах.

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