Timing Chevrolet Lacetti Como substituir o cinto de tempo com suas próprias mãos

O cinto do mecanismo de distribuição de gás é um atributo indispensável para a maioria dos veículos modernos, incluindo o carro Chevrolet Lacetti. Apesar da excelente simplicidade, este é um detalhe bastante importante para o motor de combustão interna. Substituindo o cinto de tempo no Chevrolet Lacetti - O evento é bastante demorado, mas é completamente simples, se você agir exatamente abaixo das instruções fornecidas.

Cinto de tempo, quais tarefas fazem o cinto de tempo

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A tarefa é que o eixo de cames girou a uma velocidade, exatamente a metade idêntica do volume de negócios do virabrequim. Meio século atrás, a unidade de cadeia do GRM foi usada na indústria automotiva, e todas as tentativas de adaptar o cinto para isso foram mal-entendidos. Muito tempo passou antes da unidade de correia começar a dominar. Mas ele tem várias vantagens significativas - simplificando o design, baixo ruído e uma diminuição na massa da unidade de energia.

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Hoje, os fabricantes preferem instalar drives de correia em seus carros. Mas é impossível dizer inequivocamente que a corrente é pior que o cinto. A unidade de corrente também tem sua vantagem - durabilidade, correlacionada com a duração do próprio motor. Portanto, mesmo em nosso tempo, algumas empresas de fabricação impedem sua escolha no mecanismo de cadeia. Além disso, esses motores são geralmente equipados com tensores automáticos. A vida útil do cinturão ordinário é muito raramente excede 60 mil quilômetros, e a simplicidade do design implica a necessidade de serviço permanente - pull-up, substituição, controle sobre o status do cinto.

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Cinto de tempo, como funciona e de que material

Para que a correia de tempo funcione de forma confiável, as seguintes condições devem ser observadas - o estado ideal das polias e rolos ao longo do qual a correia é movida, a tensão correta da correia, sua proteção absoluta contra o óleo e a sujeira. O design do cinto é bastante simples e algo se assemelha a um pneu de carro.

Portanto, a maioria das empresas que se especializam na produção de pneus também produzem cintos. A base da correia de tempo - cordão - o plexo de fios duráveis \u200b\u200bda fibra de vidro. Os cordões internos são dentes de materiais resistentes ao desgaste (como regra, nylon), e fora dele protege a camada de borracha, a espessura dos quais é cerca de cinco milímetros. O design dos cintos é bastante diversificado. Pode diferir na largura do cinto, número e passo dos dentes, bem como seu perfil (há cerca de vinte tipos de perfis de dentes).

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Quantas vezes altera o cinto de tempo

A substituição da correia de tempo no Chevrolet Lacetti, de acordo com os regulamentos de manutenção, é necessário conduzir a cada 60.000 quilômetros de milhagem. No entanto, a maioria dos especialistas recomenda reduzir a mudança no período de substituição devido a condições de operação complexas. Quanto à verificação do estado do cinto, então no carro Chevrolet Lacetta deve ser realizado a cada 30 mil quilômetros.

Quanto trocar o cinto de tempo, que sinais falam sobre a necessidade de substituir o cinto de tempo

  1. Vestindo material. O cinto de tempo é capaz de se desgastar da mesma maneira que, por exemplo, pneu. Se o material da correia estiver desgastado, ele pode ocorrer para abri-lo ou escorregar. Especialmente muitas vezes isso acontece em grandes cargas no motor do motor. Por exemplo, ao traçar um reboque ou reboque, bem como no clima úmido.
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  2. Abrasão de cinto. Isso acontece, por via de regra, com o desvio da polia e o rolo de tensor da posição traseira, bem como quando o mau funcionamento do rolamento e a temperatura elevada. Em caso de inspeção, você pode notar o desgaste dos dentes da correia - sua base tecidual (fibras de tecido dilatadas e textura desigual).
  3. Desapego ou rachaduras. Esse recurso de desernidade é óbvio. É necessário explorar a superfície traseira e frontal da correia. A presença de rachaduras, especialmente se houver muitos deles, indica um forte desgastado.
  4. O endurecimento da superfície oposta da correia dentada é a superfície oposta da correia é dura, não elástica e glitter. Neste caso, o cinto torna-se provocável, como resultado do qual não fornece mais o contato desejado com a polia.
  5. Alongamento. O desgaste material é capaz de liderar um forte alongamento de correia, como resultado do qual o rolo de tensão se move além dos limites permissíveis. Isso reduz a rigidez e a tensão total da correia e, consequentemente, o desempenho geral do mecanismo.
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  6. Desvio da posição designada. Esse recurso indica que os elementos internos do rolo de tensionamento estão bastante próximos da quebra. Se o rolo falhar, ele levará ao aumento do ruído, temperatura e vibrações.

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Quebrou o cinto de tempo, que lidera um desses

O acidente do cinto de tempo pode implicar uma massa de consequências desagradáveis \u200b\u200bque são diferentes, variando da necessidade de substituir a correia de tempo e restaurar o mecanismo de distribuição de gás e a revisão do motor.

A situação mais difícil é quando a válvula é curvada como resultado da pausa da correia. Isso é explicado simplesmente. A lacuna pode acontecer no período em que as válvulas caíram para a injeção de combustível ou a liberação de gases. Ao mesmo tempo, o movimento de pistões nos cilindros ainda continua e eles são capazes de atingi-los de toda a força. Neste caso, a "reunião" pode acabar muito mal.

Estimar o grau de dano só pode ser avaliado após desmantelar a cabeça do motor e estimar o estado do sistema e válvulas do pistão. Deve-se notar que o defeito da válvula não pode ver imediatamente - para diagnóstico requer equipamento especial.

Cinto de tempo, por que a substituição do cinto é melhor fazer no conjunto

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Para evitar problemas no futuro, a substituição do cinto de tempo é desejável para produzir junto com bombas e rolos. Esta não é uma ação obrigatória, no entanto, se houver fundos adicionais, é melhor não ser preguiçoso porque afetará a eficiência do novo cinto de tempo.

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Além disso, para cumprir a substituição, você terá que desmontar totalmente todos os componentes deste equipamento, incluindo a bomba com rolos. Assim, a substituição de consumíveis O custo deste procedimento não aumentará muito, e não levará muito tempo, mas aumentará a vida útil do agregado substituído.

Ferramentas, luminárias, consumíveis

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  1. Cabeça em "10", "12", "14", "17", "32".
  2. Ênfase ajustável.
  3. Hexágono em "5".
  4. A chave para "41".
  5. PASSATIA.

Técnica de segurança

É impossível trabalhar sob o veículo se ele estiver postado apenas no jack. Como seguro em obrigatório, use a estação de condição de fábrica. É proibido pendurar o carro em dois ou mais tomadas. Para proteger suas mãos de contusões e cortes com operações "poder", você deve trabalhar em luvas.

Substituindo o cinto de tempo Chevrolet Lacetti, passo a passo

  1. Abra o capô e desmonte um revestimento decorativo com um motor, para o qual você precisa desparafusar quatro porcas.
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  2. Por conveniência, desmonte a caixa do filtro de ar. Para fazer isso, com a cobertura do filtro de ar, nós desaparafusamos os quatro parafusos, bem como a camada de bocal de ar. Nós desmantelamos a tampa e o filtro de ar. Para remover o próprio filtro, desaparafuse mais dois parafusos.
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  3. Agora remova a correia de acionamento - Puxe o rolo da unidade usando a chave para "17" e desmonte o cinto das polias. Em seguida, você deve desparafusar dois parafusos e remover a tampa superior da tampa de tempo.
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  4. Fazemos a remoção da roda dianteira direita e a antera lateral do motor, que é anexada a três pistões e dois parafusos.
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  5. Nós desaparafusamos a polia do virabrequim, para a qual você corrige o volante usando uma chave de fenda enorme através da janela de visualização. Então, com um soldador e cabeça em "17" nós desaparafuse e desmantelamos a polia do virabrequim.
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  6. Você também deve remover a tampa inferior da correia de temporização, que é anexada por três engrenagens.
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  7. O próximo passo é remover o suporte do motor, para o que você precisa instalar um conector adicional para uma unidade de energia sob o palete. Em seguida, nós desaparafusamos 3 porcas e 1 parafuso usando a chave para "14" e desmontar o suporte OB.
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  8. Nós desaparafusamos os quatro parafusos ao redor do perímetro do suporte de suporte e removendo o suporte.
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  9. Além disso, em todas as polias, definimos as tags de temporização. Na polia do virabrequim, estará abaixo.
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  10. Para a conveniência da rotação do virabrequim, aperte o parafuso de polia de volta.
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  11. Agora prossiga para substituir o cinto de tempo. Usando a chave para "14", nós desaparafusamos o rolo parasitário, que está localizado à direita e desmonta o cinto, após o que nós desaparafusamos o tensor de rolos, que é anexado por três parafusos.
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  12. Antes de montar o cinto, verifique as tags, porque depois de remover eles poderiam ser derrubados.
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  13. Quando permanece apenas para usar um cinto na bomba, mova o tensor de rolos, após o que é até o final da correia e verifique a instalação dos rótulos.
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  14. Em seguida, role o virabrequim no sentido horário em uma ou duas voltas e verifique as etiquetas novamente.
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Dicas Profi, como verificar a tensão do cinto de tempo

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Para verificar a tensão do cinto de tempo, gire o virabrequim duas a três vezes no sentido horário e olhe para os dentes do rolo do tensor. É necessário que eles estejam em frente uns aos outros - mais-menos alguns milímetros. Se as leituras diferem, você terá que ajustar a tensão da correia usando as bombas.

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