What are the symptoms of a damaged flex pipe on a Honda Civic? Please be as descriptive as possible

What are the symptoms of a damaged flex pipe on a Honda Civic? Please be as descriptive as possible

Hi so age and sunlight destroy synthetic hoses which are flexible. Movement of the engine within the cars bodywork also add to this problem as flexing about over time weakens the material so leaks happen. And replace meant of the parts are the only solution.

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